diff --git a/arch/alpha/include/asm/io.h b/arch/alpha/include/asm/io.h
index b191d87f89c401..65fe1e54c6da09 100644
--- a/arch/alpha/include/asm/io.h
+++ b/arch/alpha/include/asm/io.h
@@ -88,7 +88,6 @@ static inline void * phys_to_virt(unsigned long address)
 
 #define virt_to_phys		virt_to_phys
 #define phys_to_virt		phys_to_virt
-#define page_to_phys(page)	page_to_pa(page)
 
 /* Maximum PIO space address supported?  */
 #define IO_SPACE_LIMIT 0xffff
diff --git a/arch/arc/include/asm/io.h b/arch/arc/include/asm/io.h
index f57cb5a6b62403..00171a212b3cb2 100644
--- a/arch/arc/include/asm/io.h
+++ b/arch/arc/include/asm/io.h
@@ -42,9 +42,6 @@ static inline void ioport_unmap(void __iomem *addr)
 #define iowrite16be(v,p)	({ __iowmb(); __raw_writew((__force u16)cpu_to_be16(v), p); })
 #define iowrite32be(v,p)	({ __iowmb(); __raw_writel((__force u32)cpu_to_be32(v), p); })
 
-/* Change struct page to physical address */
-#define page_to_phys(page)		(page_to_pfn(page) << PAGE_SHIFT)
-
 #define __raw_readb __raw_readb
 static inline u8 __raw_readb(const volatile void __iomem *addr)
 {
diff --git a/arch/arm/include/asm/div64.h b/arch/arm/include/asm/div64.h
index 4b69cf850451b0..d3ef8e416b27d2 100644
--- a/arch/arm/include/asm/div64.h
+++ b/arch/arm/include/asm/div64.h
@@ -52,10 +52,17 @@ static inline uint32_t __div64_32(uint64_t *n, uint32_t base)
 
 #else
 
-static inline uint64_t __arch_xprod_64(uint64_t m, uint64_t n, bool bias)
+#ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE
+static __always_inline
+#else
+static inline
+#endif
+uint64_t __arch_xprod_64(uint64_t m, uint64_t n, bool bias)
 {
 	unsigned long long res;
 	register unsigned int tmp asm("ip") = 0;
+	bool no_ovf = __builtin_constant_p(m) &&
+		      ((m >> 32) + (m & 0xffffffff) < 0x100000000);
 
 	if (!bias) {
 		asm (	"umull	%Q0, %R0, %Q1, %Q2\n\t"
@@ -63,7 +70,7 @@ static inline uint64_t __arch_xprod_64(uint64_t m, uint64_t n, bool bias)
 			: "=&r" (res)
 			: "r" (m), "r" (n)
 			: "cc");
-	} else if (!(m & ((1ULL << 63) | (1ULL << 31)))) {
+	} else if (no_ovf) {
 		res = m;
 		asm (	"umlal	%Q0, %R0, %Q1, %Q2\n\t"
 			"mov	%Q0, #0"
@@ -80,7 +87,7 @@ static inline uint64_t __arch_xprod_64(uint64_t m, uint64_t n, bool bias)
 			: "cc");
 	}
 
-	if (!(m & ((1ULL << 63) | (1ULL << 31)))) {
+	if (no_ovf) {
 		asm (	"umlal	%R0, %Q0, %R1, %Q2\n\t"
 			"umlal	%R0, %Q0, %Q1, %R2\n\t"
 			"mov	%R0, #0\n\t"
diff --git a/arch/arm/include/asm/memory.h b/arch/arm/include/asm/memory.h
index ef2aa79ece5ad5..7c2fa7dcec6d4b 100644
--- a/arch/arm/include/asm/memory.h
+++ b/arch/arm/include/asm/memory.h
@@ -147,12 +147,6 @@ extern unsigned long vectors_base;
 #define DTCM_OFFSET	UL(0xfffe8000)
 #endif
 
-/*
- * Convert a page to/from a physical address
- */
-#define page_to_phys(page)	(__pfn_to_phys(page_to_pfn(page)))
-#define phys_to_page(phys)	(pfn_to_page(__phys_to_pfn(phys)))
-
 /*
  * PLAT_PHYS_OFFSET is the offset (from zero) of the start of physical
  * memory.  This is used for XIP and NoMMU kernels, and on platforms that don't
diff --git a/arch/arm64/include/asm/io.h b/arch/arm64/include/asm/io.h
index 8688343b71f2d3..76ebbdc6ffddd8 100644
--- a/arch/arm64/include/asm/io.h
+++ b/arch/arm64/include/asm/io.h
@@ -129,17 +129,6 @@ static __always_inline u64 __raw_readq(const volatile void __iomem *addr)
 #define IO_SPACE_LIMIT		(PCI_IO_SIZE - 1)
 #define PCI_IOBASE		((void __iomem *)PCI_IO_START)
 
-/*
- * String version of I/O memory access operations.
- */
-extern void __memcpy_fromio(void *, const volatile void __iomem *, size_t);
-extern void __memcpy_toio(volatile void __iomem *, const void *, size_t);
-extern void __memset_io(volatile void __iomem *, int, size_t);
-
-#define memset_io(c,v,l)	__memset_io((c),(v),(l))
-#define memcpy_fromio(a,c,l)	__memcpy_fromio((a),(c),(l))
-#define memcpy_toio(c,a,l)	__memcpy_toio((c),(a),(l))
-
 /*
  * The ARM64 iowrite implementation is intended to support drivers that want to
  * use write combining. For instance PCI drivers using write combining with a 64
diff --git a/arch/arm64/include/asm/memory.h b/arch/arm64/include/asm/memory.h
index 0480c61dbb4f30..b9b992908a569c 100644
--- a/arch/arm64/include/asm/memory.h
+++ b/arch/arm64/include/asm/memory.h
@@ -353,12 +353,6 @@ extern phys_addr_t __phys_addr_symbol(unsigned long x);
 #define __phys_to_virt(x)	((unsigned long)((x) - PHYS_OFFSET) | PAGE_OFFSET)
 #define __phys_to_kimg(x)	((unsigned long)((x) + kimage_voffset))
 
-/*
- * Convert a page to/from a physical address
- */
-#define page_to_phys(page)	(__pfn_to_phys(page_to_pfn(page)))
-#define phys_to_page(phys)	(pfn_to_page(__phys_to_pfn(phys)))
-
 /*
  * Note: Drivers should NOT use these.  They are the wrong
  * translation for translating DMA addresses.  Use the driver
diff --git a/arch/arm64/kernel/io.c b/arch/arm64/kernel/io.c
index ef48089fbfe1a4..fe86ada23c7d43 100644
--- a/arch/arm64/kernel/io.c
+++ b/arch/arm64/kernel/io.c
@@ -9,34 +9,6 @@
 #include <linux/types.h>
 #include <linux/io.h>
 
-/*
- * Copy data from IO memory space to "real" memory space.
- */
-void __memcpy_fromio(void *to, const volatile void __iomem *from, size_t count)
-{
-	while (count && !IS_ALIGNED((unsigned long)from, 8)) {
-		*(u8 *)to = __raw_readb(from);
-		from++;
-		to++;
-		count--;
-	}
-
-	while (count >= 8) {
-		*(u64 *)to = __raw_readq(from);
-		from += 8;
-		to += 8;
-		count -= 8;
-	}
-
-	while (count) {
-		*(u8 *)to = __raw_readb(from);
-		from++;
-		to++;
-		count--;
-	}
-}
-EXPORT_SYMBOL(__memcpy_fromio);
-
 /*
  * This generates a memcpy that works on a from/to address which is aligned to
  * bits. Count is in terms of the number of bits sized quantities to copy. It
@@ -78,62 +50,3 @@ void __iowrite32_copy_full(void __iomem *to, const void *from, size_t count)
 	dgh();
 }
 EXPORT_SYMBOL(__iowrite32_copy_full);
-
-/*
- * Copy data from "real" memory space to IO memory space.
- */
-void __memcpy_toio(volatile void __iomem *to, const void *from, size_t count)
-{
-	while (count && !IS_ALIGNED((unsigned long)to, 8)) {
-		__raw_writeb(*(u8 *)from, to);
-		from++;
-		to++;
-		count--;
-	}
-
-	while (count >= 8) {
-		__raw_writeq(*(u64 *)from, to);
-		from += 8;
-		to += 8;
-		count -= 8;
-	}
-
-	while (count) {
-		__raw_writeb(*(u8 *)from, to);
-		from++;
-		to++;
-		count--;
-	}
-}
-EXPORT_SYMBOL(__memcpy_toio);
-
-/*
- * "memset" on IO memory space.
- */
-void __memset_io(volatile void __iomem *dst, int c, size_t count)
-{
-	u64 qc = (u8)c;
-
-	qc |= qc << 8;
-	qc |= qc << 16;
-	qc |= qc << 32;
-
-	while (count && !IS_ALIGNED((unsigned long)dst, 8)) {
-		__raw_writeb(c, dst);
-		dst++;
-		count--;
-	}
-
-	while (count >= 8) {
-		__raw_writeq(qc, dst);
-		dst += 8;
-		count -= 8;
-	}
-
-	while (count) {
-		__raw_writeb(c, dst);
-		dst++;
-		count--;
-	}
-}
-EXPORT_SYMBOL(__memset_io);
diff --git a/arch/csky/include/asm/io.h b/arch/csky/include/asm/io.h
index 4725bb977b0f4f..ed53f0b4738808 100644
--- a/arch/csky/include/asm/io.h
+++ b/arch/csky/include/asm/io.h
@@ -31,17 +31,6 @@
 #define writel(v,c)		({ wmb(); writel_relaxed((v),(c)); mb(); })
 #endif
 
-/*
- * String version of I/O memory access operations.
- */
-extern void __memcpy_fromio(void *, const volatile void __iomem *, size_t);
-extern void __memcpy_toio(volatile void __iomem *, const void *, size_t);
-extern void __memset_io(volatile void __iomem *, int, size_t);
-
-#define memset_io(c,v,l)        __memset_io((c),(v),(l))
-#define memcpy_fromio(a,c,l)    __memcpy_fromio((a),(c),(l))
-#define memcpy_toio(c,a,l)      __memcpy_toio((c),(a),(l))
-
 /*
  * I/O memory mapping functions.
  */
diff --git a/arch/csky/include/asm/page.h b/arch/csky/include/asm/page.h
index f8beae295afb07..4911d0892b71d7 100644
--- a/arch/csky/include/asm/page.h
+++ b/arch/csky/include/asm/page.h
@@ -39,9 +39,6 @@ extern void *memcpy(void *to, const void *from, size_t l);
 #define clear_page(page)	memset((page), 0, PAGE_SIZE)
 #define copy_page(to, from)	memcpy((to), (from), PAGE_SIZE)
 
-#define page_to_phys(page)	(page_to_pfn(page) << PAGE_SHIFT)
-#define phys_to_page(paddr)	(pfn_to_page(PFN_DOWN(paddr)))
-
 struct page;
 
 #include <abi/page.h>
diff --git a/arch/csky/kernel/Makefile b/arch/csky/kernel/Makefile
index 8a868316b912bf..de1c3472e8f07a 100644
--- a/arch/csky/kernel/Makefile
+++ b/arch/csky/kernel/Makefile
@@ -2,7 +2,7 @@
 extra-y := vmlinux.lds
 
 obj-y += head.o entry.o atomic.o signal.o traps.o irq.o time.o vdso.o vdso/
-obj-y += power.o syscall.o syscall_table.o setup.o io.o
+obj-y += power.o syscall.o syscall_table.o setup.o
 obj-y += process.o cpu-probe.o ptrace.o stacktrace.o
 obj-y += probes/
 
diff --git a/arch/csky/kernel/io.c b/arch/csky/kernel/io.c
deleted file mode 100644
index 5883f13fa2b18a..00000000000000
--- a/arch/csky/kernel/io.c
+++ /dev/null
@@ -1,91 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-
-#include <linux/export.h>
-#include <linux/types.h>
-#include <linux/io.h>
-
-/*
- * Copy data from IO memory space to "real" memory space.
- */
-void __memcpy_fromio(void *to, const volatile void __iomem *from, size_t count)
-{
-	while (count && !IS_ALIGNED((unsigned long)from, 4)) {
-		*(u8 *)to = __raw_readb(from);
-		from++;
-		to++;
-		count--;
-	}
-
-	while (count >= 4) {
-		*(u32 *)to = __raw_readl(from);
-		from += 4;
-		to += 4;
-		count -= 4;
-	}
-
-	while (count) {
-		*(u8 *)to = __raw_readb(from);
-		from++;
-		to++;
-		count--;
-	}
-}
-EXPORT_SYMBOL(__memcpy_fromio);
-
-/*
- * Copy data from "real" memory space to IO memory space.
- */
-void __memcpy_toio(volatile void __iomem *to, const void *from, size_t count)
-{
-	while (count && !IS_ALIGNED((unsigned long)to, 4)) {
-		__raw_writeb(*(u8 *)from, to);
-		from++;
-		to++;
-		count--;
-	}
-
-	while (count >= 4) {
-		__raw_writel(*(u32 *)from, to);
-		from += 4;
-		to += 4;
-		count -= 4;
-	}
-
-	while (count) {
-		__raw_writeb(*(u8 *)from, to);
-		from++;
-		to++;
-		count--;
-	}
-}
-EXPORT_SYMBOL(__memcpy_toio);
-
-/*
- * "memset" on IO memory space.
- */
-void __memset_io(volatile void __iomem *dst, int c, size_t count)
-{
-	u32 qc = (u8)c;
-
-	qc |= qc << 8;
-	qc |= qc << 16;
-
-	while (count && !IS_ALIGNED((unsigned long)dst, 4)) {
-		__raw_writeb(c, dst);
-		dst++;
-		count--;
-	}
-
-	while (count >= 4) {
-		__raw_writel(qc, dst);
-		dst += 4;
-		count -= 4;
-	}
-
-	while (count) {
-		__raw_writeb(c, dst);
-		dst++;
-		count--;
-	}
-}
-EXPORT_SYMBOL(__memset_io);
diff --git a/arch/hexagon/Kconfig b/arch/hexagon/Kconfig
index e233b5efa2761e..3eb51fbe804ea2 100644
--- a/arch/hexagon/Kconfig
+++ b/arch/hexagon/Kconfig
@@ -30,8 +30,6 @@ config HEXAGON
 	select HAVE_ARCH_KGDB
 	select HAVE_ARCH_TRACEHOOK
 	select NEED_SG_DMA_LENGTH
-	select NO_IOPORT_MAP
-	select GENERIC_IOMAP
 	select GENERIC_IOREMAP
 	select GENERIC_SMP_IDLE_THREAD
 	select STACKTRACE_SUPPORT
@@ -59,6 +57,9 @@ config EARLY_PRINTK
 config MMU
 	def_bool y
 
+config NO_IOPORT_MAP
+	def_bool y
+
 config GENERIC_CSUM
 	def_bool y
 
diff --git a/arch/hexagon/include/asm/io.h b/arch/hexagon/include/asm/io.h
index 522d321ea85a75..83b2eb5de60c45 100644
--- a/arch/hexagon/include/asm/io.h
+++ b/arch/hexagon/include/asm/io.h
@@ -8,38 +8,13 @@
 #ifndef _ASM_IO_H
 #define _ASM_IO_H
 
-#ifdef __KERNEL__
-
 #include <linux/types.h>
-#include <asm/iomap.h>
 #include <asm/page.h>
 #include <asm/cacheflush.h>
 
-/*
- * We don't have PCI yet.
- * _IO_BASE is pointing at what should be unused virtual space.
- */
-#define IO_SPACE_LIMIT 0xffff
-#define _IO_BASE ((void __iomem *)0xfe000000)
-
-#define IOMEM(x)        ((void __force __iomem *)(x))
-
 extern int remap_area_pages(unsigned long start, unsigned long phys_addr,
 				unsigned long end, unsigned long flags);
 
-/* Defined in lib/io.c, needed for smc91x driver. */
-extern void __raw_readsw(const void __iomem *addr, void *data, int wordlen);
-extern void __raw_writesw(void __iomem *addr, const void *data, int wordlen);
-
-extern void __raw_readsl(const void __iomem *addr, void *data, int wordlen);
-extern void __raw_writesl(void __iomem *addr, const void *data, int wordlen);
-
-#define readsw(p, d, l)	__raw_readsw(p, d, l)
-#define writesw(p, d, l) __raw_writesw(p, d, l)
-
-#define readsl(p, d, l)   __raw_readsl(p, d, l)
-#define writesl(p, d, l)  __raw_writesl(p, d, l)
-
 /*
  * virt_to_phys - map virtual address to physical
  * @address:  address to map
@@ -58,21 +33,12 @@ static inline void *phys_to_virt(unsigned long address)
 	return __va(address);
 }
 
-/*
- * IO port access primitives.  Hexagon doesn't have special IO access
- * instructions; all I/O is memory mapped.
- *
- * in/out are used for "ports", but we don't have "port instructions",
- * so these are really just memory mapped too.
- */
-
 /*
  * readb - read byte from memory mapped device
  * @addr:  pointer to memory
  *
- * Operates on "I/O bus memory space"
  */
-static inline u8 readb(const volatile void __iomem *addr)
+static inline u8 __raw_readb(const volatile void __iomem *addr)
 {
 	u8 val;
 	asm volatile(
@@ -82,8 +48,9 @@ static inline u8 readb(const volatile void __iomem *addr)
 	);
 	return val;
 }
+#define __raw_readb __raw_readb
 
-static inline u16 readw(const volatile void __iomem *addr)
+static inline u16 __raw_readw(const volatile void __iomem *addr)
 {
 	u16 val;
 	asm volatile(
@@ -93,8 +60,9 @@ static inline u16 readw(const volatile void __iomem *addr)
 	);
 	return val;
 }
+#define __raw_readw __raw_readw
 
-static inline u32 readl(const volatile void __iomem *addr)
+static inline u32 __raw_readl(const volatile void __iomem *addr)
 {
 	u32 val;
 	asm volatile(
@@ -104,6 +72,7 @@ static inline u32 readl(const volatile void __iomem *addr)
 	);
 	return val;
 }
+#define __raw_readl __raw_readl
 
 /*
  * writeb - write a byte to a memory location
@@ -111,7 +80,7 @@ static inline u32 readl(const volatile void __iomem *addr)
  * @addr:  pointer to memory
  *
  */
-static inline void writeb(u8 data, volatile void __iomem *addr)
+static inline void __raw_writeb(u8 data, volatile void __iomem *addr)
 {
 	asm volatile(
 		"memb(%0) = %1;"
@@ -120,8 +89,9 @@ static inline void writeb(u8 data, volatile void __iomem *addr)
 		: "memory"
 	);
 }
+#define __raw_writeb __raw_writeb
 
-static inline void writew(u16 data, volatile void __iomem *addr)
+static inline void __raw_writew(u16 data, volatile void __iomem *addr)
 {
 	asm volatile(
 		"memh(%0) = %1;"
@@ -131,8 +101,9 @@ static inline void writew(u16 data, volatile void __iomem *addr)
 	);
 
 }
+#define __raw_writew __raw_writew
 
-static inline void writel(u32 data, volatile void __iomem *addr)
+static inline void __raw_writel(u32 data, volatile void __iomem *addr)
 {
 	asm volatile(
 		"memw(%0) = %1;"
@@ -141,26 +112,7 @@ static inline void writel(u32 data, volatile void __iomem *addr)
 		: "memory"
 	);
 }
-
-#define __raw_writeb writeb
-#define __raw_writew writew
-#define __raw_writel writel
-
-#define __raw_readb readb
-#define __raw_readw readw
-#define __raw_readl readl
-
-/*
- * http://comments.gmane.org/gmane.linux.ports.arm.kernel/117626
- */
-
-#define readb_relaxed __raw_readb
-#define readw_relaxed __raw_readw
-#define readl_relaxed __raw_readl
-
-#define writeb_relaxed __raw_writeb
-#define writew_relaxed __raw_writew
-#define writel_relaxed __raw_writel
+#define __raw_writel __raw_writel
 
 /*
  * I/O memory mapping functions.
@@ -168,140 +120,6 @@ static inline void writel(u32 data, volatile void __iomem *addr)
 #define _PAGE_IOREMAP (_PAGE_PRESENT | _PAGE_READ | _PAGE_WRITE | \
 		       (__HEXAGON_C_DEV << 6))
 
-#define __raw_writel writel
-
-static inline void memcpy_fromio(void *dst, const volatile void __iomem *src,
-	int count)
-{
-	memcpy(dst, (void *) src, count);
-}
-
-static inline void memcpy_toio(volatile void __iomem *dst, const void *src,
-	int count)
-{
-	memcpy((void *) dst, src, count);
-}
-
-static inline void memset_io(volatile void __iomem *addr, int value,
-			     size_t size)
-{
-	memset((void __force *)addr, value, size);
-}
-
-#define PCI_IO_ADDR	(volatile void __iomem *)
-
-/*
- * inb - read byte from I/O port or something
- * @port:  address in I/O space
- *
- * Operates on "I/O bus I/O space"
- */
-static inline u8 inb(unsigned long port)
-{
-	return readb(_IO_BASE + (port & IO_SPACE_LIMIT));
-}
-
-static inline u16 inw(unsigned long port)
-{
-	return readw(_IO_BASE + (port & IO_SPACE_LIMIT));
-}
-
-static inline u32 inl(unsigned long port)
-{
-	return readl(_IO_BASE + (port & IO_SPACE_LIMIT));
-}
-
-/*
- * outb - write a byte to a memory location
- * @data: data to write to
- * @addr:  address in I/O space
- */
-static inline void outb(u8 data, unsigned long port)
-{
-	writeb(data, _IO_BASE + (port & IO_SPACE_LIMIT));
-}
-
-static inline void outw(u16 data, unsigned long port)
-{
-	writew(data, _IO_BASE + (port & IO_SPACE_LIMIT));
-}
-
-static inline void outl(u32 data, unsigned long port)
-{
-	writel(data, _IO_BASE + (port & IO_SPACE_LIMIT));
-}
-
-#define outb_p outb
-#define outw_p outw
-#define outl_p outl
-
-#define inb_p inb
-#define inw_p inw
-#define inl_p inl
-
-static inline void insb(unsigned long port, void *buffer, int count)
-{
-	if (count) {
-		u8 *buf = buffer;
-		do {
-			u8 x = inb(port);
-			*buf++ = x;
-		} while (--count);
-	}
-}
-
-static inline void insw(unsigned long port, void *buffer, int count)
-{
-	if (count) {
-		u16 *buf = buffer;
-		do {
-			u16 x = inw(port);
-			*buf++ = x;
-		} while (--count);
-	}
-}
-
-static inline void insl(unsigned long port, void *buffer, int count)
-{
-	if (count) {
-		u32 *buf = buffer;
-		do {
-			u32 x = inw(port);
-			*buf++ = x;
-		} while (--count);
-	}
-}
-
-static inline void outsb(unsigned long port, const void *buffer, int count)
-{
-	if (count) {
-		const u8 *buf = buffer;
-		do {
-			outb(*buf++, port);
-		} while (--count);
-	}
-}
-
-static inline void outsw(unsigned long port, const void *buffer, int count)
-{
-	if (count) {
-		const u16 *buf = buffer;
-		do {
-			outw(*buf++, port);
-		} while (--count);
-	}
-}
-
-static inline void outsl(unsigned long port, const void *buffer, int count)
-{
-	if (count) {
-		const u32 *buf = buffer;
-		do {
-			outl(*buf++, port);
-		} while (--count);
-	}
-}
-
 /*
  * These defines are necessary to use the generic io.h for filling in
  * the missing parts of the API contract. This is because the platform
@@ -310,23 +128,6 @@ static inline void outsl(unsigned long port, const void *buffer, int count)
  */
 #define virt_to_phys virt_to_phys
 #define phys_to_virt phys_to_virt
-#define memset_io memset_io
-#define memcpy_fromio memcpy_fromio
-#define memcpy_toio memcpy_toio
-#define readb readb
-#define readw readw
-#define readl readl
-#define writeb writeb
-#define writew writew
-#define writel writel
-#define insb insb
-#define insw insw
-#define insl insl
-#define outsb outsb
-#define outsw outsw
-#define outsl outsl
 #include <asm-generic/io.h>
 
-#endif /* __KERNEL__ */
-
 #endif
diff --git a/arch/hexagon/include/asm/page.h b/arch/hexagon/include/asm/page.h
index b01f8df69dd40a..137ba7c5de4811 100644
--- a/arch/hexagon/include/asm/page.h
+++ b/arch/hexagon/include/asm/page.h
@@ -116,12 +116,6 @@ static inline void clear_page(void *page)
 #define clear_user_page(page, vaddr, pg)	clear_page(page)
 #define copy_user_page(to, from, vaddr, pg)	copy_page(to, from)
 
-/*
- * page_to_phys - convert page to physical address
- * @page - pointer to page entry in mem_map
- */
-#define page_to_phys(page)      (page_to_pfn(page) << PAGE_SHIFT)
-
 static inline unsigned long virt_to_pfn(const void *kaddr)
 {
 	return __pa(kaddr) >> PAGE_SHIFT;
diff --git a/arch/hexagon/lib/Makefile b/arch/hexagon/lib/Makefile
index a64641e89d5fe7..107894c0910ed2 100644
--- a/arch/hexagon/lib/Makefile
+++ b/arch/hexagon/lib/Makefile
@@ -2,5 +2,5 @@
 #
 # Makefile for hexagon-specific library files.
 #
-obj-y = checksum.o io.o memcpy.o memset.o memcpy_likely_aligned.o \
+obj-y = checksum.o memcpy.o memset.o memcpy_likely_aligned.o \
          divsi3.o modsi3.o udivsi3.o  umodsi3.o
diff --git a/arch/hexagon/lib/io.c b/arch/hexagon/lib/io.c
deleted file mode 100644
index 55f75392857b00..00000000000000
--- a/arch/hexagon/lib/io.c
+++ /dev/null
@@ -1,82 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * I/O access functions for Hexagon
- *
- * Copyright (c) 2010-2011, The Linux Foundation. All rights reserved.
- */
-
-#include <asm/io.h>
-
-/*  These are all FIFO routines!  */
-
-/*
- * __raw_readsw - read words a short at a time
- * @addr:  source address
- * @data:  data address
- * @len: number of shorts to read
- */
-void __raw_readsw(const void __iomem *addr, void *data, int len)
-{
-	const volatile short int *src = (short int *) addr;
-	short int *dst = (short int *) data;
-
-	if ((u32)data & 0x1)
-		panic("unaligned pointer to readsw");
-
-	while (len-- > 0)
-		*dst++ = *src;
-
-}
-EXPORT_SYMBOL(__raw_readsw);
-
-/*
- * __raw_writesw - read words a short at a time
- * @addr:  source address
- * @data:  data address
- * @len: number of shorts to read
- */
-void __raw_writesw(void __iomem *addr, const void *data, int len)
-{
-	const short int *src = (short int *)data;
-	volatile short int *dst = (short int *)addr;
-
-	if ((u32)data & 0x1)
-		panic("unaligned pointer to writesw");
-
-	while (len-- > 0)
-		*dst = *src++;
-
-
-}
-EXPORT_SYMBOL(__raw_writesw);
-
-/*  Pretty sure len is pre-adjusted for the length of the access already */
-void __raw_readsl(const void __iomem *addr, void *data, int len)
-{
-	const volatile long *src = (long *) addr;
-	long *dst = (long *) data;
-
-	if ((u32)data & 0x3)
-		panic("unaligned pointer to readsl");
-
-	while (len-- > 0)
-		*dst++ = *src;
-
-
-}
-EXPORT_SYMBOL(__raw_readsl);
-
-void __raw_writesl(void __iomem *addr, const void *data, int len)
-{
-	const long *src = (long *)data;
-	volatile long *dst = (long *)addr;
-
-	if ((u32)data & 0x3)
-		panic("unaligned pointer to writesl");
-
-	while (len-- > 0)
-		*dst = *src++;
-
-
-}
-EXPORT_SYMBOL(__raw_writesl);
diff --git a/arch/loongarch/include/asm/io.h b/arch/loongarch/include/asm/io.h
index 5e95a60df1808a..e77a56eaf90604 100644
--- a/arch/loongarch/include/asm/io.h
+++ b/arch/loongarch/include/asm/io.h
@@ -62,16 +62,6 @@ static inline void __iomem *ioremap_prot(phys_addr_t offset, unsigned long size,
 
 #define mmiowb() wmb()
 
-/*
- * String version of I/O memory access operations.
- */
-extern void __memset_io(volatile void __iomem *dst, int c, size_t count);
-extern void __memcpy_toio(volatile void __iomem *to, const void *from, size_t count);
-extern void __memcpy_fromio(void *to, const volatile void __iomem *from, size_t count);
-#define memset_io(c, v, l)     __memset_io((c), (v), (l))
-#define memcpy_fromio(a, c, l) __memcpy_fromio((a), (c), (l))
-#define memcpy_toio(c, a, l)   __memcpy_toio((c), (a), (l))
-
 #define __io_aw() mmiowb()
 
 #ifdef CONFIG_KFENCE
diff --git a/arch/loongarch/include/asm/page.h b/arch/loongarch/include/asm/page.h
index 2e56a773660f59..7368f12b7cb1ec 100644
--- a/arch/loongarch/include/asm/page.h
+++ b/arch/loongarch/include/asm/page.h
@@ -76,9 +76,6 @@ struct page *tlb_virt_to_page(unsigned long kaddr);
 #define pfn_to_phys(pfn)	__pfn_to_phys(pfn)
 #define phys_to_pfn(paddr)	__phys_to_pfn(paddr)
 
-#define page_to_phys(page)	pfn_to_phys(page_to_pfn(page))
-#define phys_to_page(paddr)	pfn_to_page(phys_to_pfn(paddr))
-
 #ifndef CONFIG_KFENCE
 
 #define page_to_virt(page)	__va(page_to_phys(page))
diff --git a/arch/loongarch/kernel/Makefile b/arch/loongarch/kernel/Makefile
index c9bfeda89e4076..9497968ee158ff 100644
--- a/arch/loongarch/kernel/Makefile
+++ b/arch/loongarch/kernel/Makefile
@@ -8,7 +8,7 @@ OBJECT_FILES_NON_STANDARD_head.o := y
 extra-y		:= vmlinux.lds
 
 obj-y		+= head.o cpu-probe.o cacheinfo.o env.o setup.o entry.o genex.o \
-		   traps.o irq.o idle.o process.o dma.o mem.o io.o reset.o switch.o \
+		   traps.o irq.o idle.o process.o dma.o mem.o reset.o switch.o \
 		   elf.o syscall.o signal.o time.o topology.o inst.o ptrace.o vdso.o \
 		   alternative.o unwind.o
 
diff --git a/arch/loongarch/kernel/io.c b/arch/loongarch/kernel/io.c
deleted file mode 100644
index cb85bda5a6ada9..00000000000000
--- a/arch/loongarch/kernel/io.c
+++ /dev/null
@@ -1,94 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Copyright (C) 2020-2022 Loongson Technology Corporation Limited
- */
-#include <linux/export.h>
-#include <linux/types.h>
-#include <linux/io.h>
-
-/*
- * Copy data from IO memory space to "real" memory space.
- */
-void __memcpy_fromio(void *to, const volatile void __iomem *from, size_t count)
-{
-	while (count && !IS_ALIGNED((unsigned long)from, 8)) {
-		*(u8 *)to = __raw_readb(from);
-		from++;
-		to++;
-		count--;
-	}
-
-	while (count >= 8) {
-		*(u64 *)to = __raw_readq(from);
-		from += 8;
-		to += 8;
-		count -= 8;
-	}
-
-	while (count) {
-		*(u8 *)to = __raw_readb(from);
-		from++;
-		to++;
-		count--;
-	}
-}
-EXPORT_SYMBOL(__memcpy_fromio);
-
-/*
- * Copy data from "real" memory space to IO memory space.
- */
-void __memcpy_toio(volatile void __iomem *to, const void *from, size_t count)
-{
-	while (count && !IS_ALIGNED((unsigned long)to, 8)) {
-		__raw_writeb(*(u8 *)from, to);
-		from++;
-		to++;
-		count--;
-	}
-
-	while (count >= 8) {
-		__raw_writeq(*(u64 *)from, to);
-		from += 8;
-		to += 8;
-		count -= 8;
-	}
-
-	while (count) {
-		__raw_writeb(*(u8 *)from, to);
-		from++;
-		to++;
-		count--;
-	}
-}
-EXPORT_SYMBOL(__memcpy_toio);
-
-/*
- * "memset" on IO memory space.
- */
-void __memset_io(volatile void __iomem *dst, int c, size_t count)
-{
-	u64 qc = (u8)c;
-
-	qc |= qc << 8;
-	qc |= qc << 16;
-	qc |= qc << 32;
-
-	while (count && !IS_ALIGNED((unsigned long)dst, 8)) {
-		__raw_writeb(c, dst);
-		dst++;
-		count--;
-	}
-
-	while (count >= 8) {
-		__raw_writeq(qc, dst);
-		dst += 8;
-		count -= 8;
-	}
-
-	while (count) {
-		__raw_writeb(c, dst);
-		dst++;
-		count--;
-	}
-}
-EXPORT_SYMBOL(__memset_io);
diff --git a/arch/m68k/include/asm/virtconvert.h b/arch/m68k/include/asm/virtconvert.h
index 0a27905b0036ff..32e27bddb7d430 100644
--- a/arch/m68k/include/asm/virtconvert.h
+++ b/arch/m68k/include/asm/virtconvert.h
@@ -28,9 +28,6 @@ static inline void *phys_to_virt(unsigned long address)
 	return __va(address);
 }
 
-/* Permanent address of a page. */
-#define page_to_phys(page)	(page_to_pfn(page) << PAGE_SHIFT)
-
 /*
  * IO bus memory addresses are 1:1 with the physical address,
  * deprecated globally but still used on two machines.
diff --git a/arch/microblaze/include/asm/page.h b/arch/microblaze/include/asm/page.h
index d1ec3806edab94..90fc9c81debda7 100644
--- a/arch/microblaze/include/asm/page.h
+++ b/arch/microblaze/include/asm/page.h
@@ -98,7 +98,6 @@ extern int page_is_ram(unsigned long pfn);
 
 #  define virt_to_page(kaddr)	(pfn_to_page(__pa(kaddr) >> PAGE_SHIFT))
 #  define page_to_virt(page)   __va(page_to_pfn(page) << PAGE_SHIFT)
-#  define page_to_phys(page)     (page_to_pfn(page) << PAGE_SHIFT)
 
 #  define ARCH_PFN_OFFSET	(memory_start >> PAGE_SHIFT)
 # endif /* __ASSEMBLY__ */
diff --git a/arch/mips/include/asm/io.h b/arch/mips/include/asm/io.h
index af58d6ae06b85e..0bddb568af7c1c 100644
--- a/arch/mips/include/asm/io.h
+++ b/arch/mips/include/asm/io.h
@@ -125,11 +125,6 @@ static inline unsigned long isa_virt_to_bus(volatile void *address)
 	return virt_to_phys(address);
 }
 
-/*
- * Change "struct page" to physical address.
- */
-#define page_to_phys(page)	((dma_addr_t)page_to_pfn(page) << PAGE_SHIFT)
-
 void __iomem *ioremap_prot(phys_addr_t offset, unsigned long size,
 		unsigned long prot_val);
 void iounmap(const volatile void __iomem *addr);
diff --git a/arch/mips/include/asm/vga.h b/arch/mips/include/asm/vga.h
index 0136e03666989a..491c2b5aeb8162 100644
--- a/arch/mips/include/asm/vga.h
+++ b/arch/mips/include/asm/vga.h
@@ -47,10 +47,6 @@ static inline void scr_memsetw(u16 *s, u16 v, unsigned int count)
 	memset16(s, cpu_to_le16(v), count / 2);
 }
 
-#define scr_memcpyw(d, s, c) memcpy(d, s, c)
-#define scr_memmovew(d, s, c) memmove(d, s, c)
-#define VT_BUF_HAVE_MEMCPYW
-#define VT_BUF_HAVE_MEMMOVEW
 #define VT_BUF_HAVE_MEMSETW
 
 #endif /* _ASM_VGA_H */
diff --git a/arch/nios2/include/asm/io.h b/arch/nios2/include/asm/io.h
index 746853ac7d8d38..36e3550673b34b 100644
--- a/arch/nios2/include/asm/io.h
+++ b/arch/nios2/include/asm/io.h
@@ -28,9 +28,6 @@
 void __iomem *ioremap(unsigned long physaddr, unsigned long size);
 void iounmap(void __iomem *addr);
 
-/* Pages to physical address... */
-#define page_to_phys(page)	virt_to_phys(page_to_virt(page))
-
 /* Macros used for converting between virtual and physical mappings. */
 #define phys_to_virt(vaddr)	\
 	((void *)((unsigned long)(vaddr) | CONFIG_NIOS2_KERNEL_REGION_BASE))
diff --git a/arch/openrisc/include/asm/page.h b/arch/openrisc/include/asm/page.h
index 124a2db4b16030..c589e96035e15e 100644
--- a/arch/openrisc/include/asm/page.h
+++ b/arch/openrisc/include/asm/page.h
@@ -71,8 +71,6 @@ static inline unsigned long virt_to_pfn(const void *kaddr)
 #define virt_to_page(addr) \
 	(mem_map + (((unsigned long)(addr)-PAGE_OFFSET) >> PAGE_SHIFT))
 
-#define page_to_phys(page)      ((dma_addr_t)page_to_pfn(page) << PAGE_SHIFT)
-
 #define virt_addr_valid(kaddr)	(pfn_valid(virt_to_pfn(kaddr)))
 
 #endif /* __ASSEMBLY__ */
diff --git a/arch/parisc/include/asm/page.h b/arch/parisc/include/asm/page.h
index 6c4836fb540705..7fd44709263077 100644
--- a/arch/parisc/include/asm/page.h
+++ b/arch/parisc/include/asm/page.h
@@ -166,7 +166,6 @@ extern int npmem_ranges;
 
 #define virt_addr_valid(kaddr)	pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
 
-#define page_to_phys(page)	(page_to_pfn(page) << PAGE_SHIFT)
 #define virt_to_page(kaddr)     pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
 
 #include <asm-generic/memory_model.h>
diff --git a/arch/powerpc/include/asm/io.h b/arch/powerpc/include/asm/io.h
index 52e1b1d15ff63a..fd92ac4501693c 100644
--- a/arch/powerpc/include/asm/io.h
+++ b/arch/powerpc/include/asm/io.h
@@ -969,18 +969,6 @@ static inline void * phys_to_virt(unsigned long address)
 }
 #define phys_to_virt phys_to_virt
 
-/*
- * Change "struct page" to physical address.
- */
-static inline phys_addr_t page_to_phys(struct page *page)
-{
-	unsigned long pfn = page_to_pfn(page);
-
-	WARN_ON(IS_ENABLED(CONFIG_DEBUG_VIRTUAL) && !pfn_valid(pfn));
-
-	return PFN_PHYS(pfn);
-}
-
 /*
  * 32 bits still uses virt_to_bus() for its implementation of DMA
  * mappings se we have to keep it defined here. We also have some old
diff --git a/arch/powerpc/include/asm/vga.h b/arch/powerpc/include/asm/vga.h
index fcf721682a7119..f2dc40e1c52ae1 100644
--- a/arch/powerpc/include/asm/vga.h
+++ b/arch/powerpc/include/asm/vga.h
@@ -40,11 +40,6 @@ static inline void scr_memsetw(u16 *s, u16 v, unsigned int n)
 	memset16(s, cpu_to_le16(v), n / 2);
 }
 
-#define VT_BUF_HAVE_MEMCPYW
-#define VT_BUF_HAVE_MEMMOVEW
-#define scr_memcpyw	memcpy
-#define scr_memmovew	memmove
-
 #endif /* !CONFIG_VGA_CONSOLE && !CONFIG_MDA_CONSOLE */
 
 #ifdef __powerpc64__
diff --git a/arch/riscv/include/asm/page.h b/arch/riscv/include/asm/page.h
index 9875399827c780..71aabc5c671389 100644
--- a/arch/riscv/include/asm/page.h
+++ b/arch/riscv/include/asm/page.h
@@ -192,9 +192,6 @@ extern phys_addr_t __phys_addr_symbol(unsigned long x);
 #define virt_to_page(vaddr)	(pfn_to_page(virt_to_pfn(vaddr)))
 #define page_to_virt(page)	(pfn_to_virt(page_to_pfn(page)))
 
-#define page_to_phys(page)	(pfn_to_phys(page_to_pfn(page)))
-#define phys_to_page(paddr)	(pfn_to_page(phys_to_pfn(paddr)))
-
 #define sym_to_pfn(x)           __phys_to_pfn(__pa_symbol(x))
 
 unsigned long kaslr_offset(void);
diff --git a/arch/s390/include/asm/page.h b/arch/s390/include/asm/page.h
index d703e736bddc90..b13a46e2e931ed 100644
--- a/arch/s390/include/asm/page.h
+++ b/arch/s390/include/asm/page.h
@@ -241,9 +241,7 @@ static inline unsigned long __phys_addr(unsigned long x, bool is_31bit)
 #define phys_to_pfn(phys)	((phys) >> PAGE_SHIFT)
 #define pfn_to_phys(pfn)	((pfn) << PAGE_SHIFT)
 
-#define phys_to_page(phys)	pfn_to_page(phys_to_pfn(phys))
 #define phys_to_folio(phys)	page_folio(phys_to_page(phys))
-#define page_to_phys(page)	pfn_to_phys(page_to_pfn(page))
 #define folio_to_phys(page)	pfn_to_phys(folio_pfn(folio))
 
 static inline void *pfn_to_virt(unsigned long pfn)
diff --git a/arch/sh/include/asm/page.h b/arch/sh/include/asm/page.h
index fc39b8171bfb4f..3990cbd9aa0442 100644
--- a/arch/sh/include/asm/page.h
+++ b/arch/sh/include/asm/page.h
@@ -145,7 +145,6 @@ typedef struct page *pgtable_t;
 #endif
 
 #define pfn_to_kaddr(pfn)	__va((pfn) << PAGE_SHIFT)
-#define page_to_phys(page)	(page_to_pfn(page) << PAGE_SHIFT)
 
 /*
  * PFN = physical frame number (ie PFN 0 == physical address 0)
diff --git a/arch/sh/include/asm/vga.h b/arch/sh/include/asm/vga.h
deleted file mode 100644
index 089fbdc6c0b1d0..00000000000000
--- a/arch/sh/include/asm/vga.h
+++ /dev/null
@@ -1,7 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef __ASM_SH_VGA_H
-#define __ASM_SH_VGA_H
-
-/* Stupid drivers. */
-
-#endif /* __ASM_SH_VGA_H */
diff --git a/arch/sparc/include/asm/page.h b/arch/sparc/include/asm/page.h
index 5e44cdf2a8f2bd..1a00cc0a1893eb 100644
--- a/arch/sparc/include/asm/page.h
+++ b/arch/sparc/include/asm/page.h
@@ -2,8 +2,6 @@
 #ifndef ___ASM_SPARC_PAGE_H
 #define ___ASM_SPARC_PAGE_H
 
-#define page_to_phys(page)	(page_to_pfn(page) << PAGE_SHIFT)
-
 #if defined(__sparc__) && defined(__arch64__)
 #include <asm/page_64.h>
 #else
diff --git a/arch/sparc/include/asm/vga.h b/arch/sparc/include/asm/vga.h
deleted file mode 100644
index 2952d667d93634..00000000000000
--- a/arch/sparc/include/asm/vga.h
+++ /dev/null
@@ -1,60 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-/*
- *	Access to VGA videoram
- *
- *	(c) 1998 Martin Mares <mj@ucw.cz>
- */
-
-#ifndef _LINUX_ASM_VGA_H_
-#define _LINUX_ASM_VGA_H_
-
-#include <linux/bug.h>
-#include <linux/string.h>
-#include <asm/types.h>
-
-#define VT_BUF_HAVE_RW
-#define VT_BUF_HAVE_MEMSETW
-#define VT_BUF_HAVE_MEMCPYW
-#define VT_BUF_HAVE_MEMMOVEW
-
-#undef scr_writew
-#undef scr_readw
-
-static inline void scr_writew(u16 val, u16 *addr)
-{
-	BUG_ON((long) addr >= 0);
-
-	*addr = val;
-}
-
-static inline u16 scr_readw(const u16 *addr)
-{
-	BUG_ON((long) addr >= 0);
-
-	return *addr;
-}
-
-static inline void scr_memsetw(u16 *p, u16 v, unsigned int n)
-{
-	BUG_ON((long) p >= 0);
-
-	memset16(p, cpu_to_le16(v), n / 2);
-}
-
-static inline void scr_memcpyw(u16 *d, u16 *s, unsigned int n)
-{
-	BUG_ON((long) d >= 0);
-
-	memcpy(d, s, n);
-}
-
-static inline void scr_memmovew(u16 *d, u16 *s, unsigned int n)
-{
-	BUG_ON((long) d >= 0);
-
-	memmove(d, s, n);
-}
-
-#define VGA_MAP_MEM(x,s) (x)
-
-#endif
diff --git a/arch/um/include/asm/pgtable.h b/arch/um/include/asm/pgtable.h
index 83373c9963e7c9..faab5a2a4b061f 100644
--- a/arch/um/include/asm/pgtable.h
+++ b/arch/um/include/asm/pgtable.h
@@ -287,9 +287,7 @@ static inline int pte_same(pte_t pte_a, pte_t pte_b)
  * and a page entry and page directory to the page they refer to.
  */
 
-#define phys_to_page(phys) pfn_to_page(phys_to_pfn(phys))
 #define __virt_to_page(virt) phys_to_page(__pa(virt))
-#define page_to_phys(page) pfn_to_phys(page_to_pfn(page))
 #define virt_to_page(addr) __virt_to_page((const unsigned long) addr)
 
 #define mk_pte(page, pgprot) \
diff --git a/arch/x86/include/asm/io.h b/arch/x86/include/asm/io.h
index 1d60427379c939..ed580c7f9d0aaf 100644
--- a/arch/x86/include/asm/io.h
+++ b/arch/x86/include/asm/io.h
@@ -151,11 +151,6 @@ static inline void *phys_to_virt(phys_addr_t address)
 }
 #define phys_to_virt phys_to_virt
 
-/*
- * Change "struct page" to physical address.
- */
-#define page_to_phys(page)    ((dma_addr_t)page_to_pfn(page) << PAGE_SHIFT)
-
 /*
  * ISA I/O bus memory addresses are 1:1 with the physical address.
  * However, we truncate the address to unsigned int to avoid undesirable
diff --git a/arch/xtensa/include/asm/page.h b/arch/xtensa/include/asm/page.h
index 595c1037b73889..efdea5d5bca07d 100644
--- a/arch/xtensa/include/asm/page.h
+++ b/arch/xtensa/include/asm/page.h
@@ -189,7 +189,6 @@ static inline unsigned long ___pa(unsigned long va)
 #define virt_to_page(kaddr)	pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
 #define page_to_virt(page)	__va(page_to_pfn(page) << PAGE_SHIFT)
 #define virt_addr_valid(kaddr)	pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
-#define page_to_phys(page)	(page_to_pfn(page) << PAGE_SHIFT)
 
 #endif /* __ASSEMBLY__ */
 
diff --git a/drivers/bluetooth/Kconfig b/drivers/bluetooth/Kconfig
index 18767b54df352e..4ab32abf0f4864 100644
--- a/drivers/bluetooth/Kconfig
+++ b/drivers/bluetooth/Kconfig
@@ -336,7 +336,7 @@ config BT_HCIBFUSB
 
 config BT_HCIDTL1
 	tristate "HCI DTL1 (PC Card) driver"
-	depends on PCMCIA
+	depends on PCMCIA && HAS_IOPORT
 	help
 	  Bluetooth HCI DTL1 (PC Card) driver.
 	  This driver provides support for Bluetooth PCMCIA devices with
@@ -349,7 +349,7 @@ config BT_HCIDTL1
 
 config BT_HCIBT3C
 	tristate "HCI BT3C (PC Card) driver"
-	depends on PCMCIA
+	depends on PCMCIA && HAS_IOPORT
 	select FW_LOADER
 	help
 	  Bluetooth HCI BT3C (PC Card) driver.
@@ -363,7 +363,7 @@ config BT_HCIBT3C
 
 config BT_HCIBLUECARD
 	tristate "HCI BlueCard (PC Card) driver"
-	depends on PCMCIA
+	depends on PCMCIA && HAS_IOPORT
 	help
 	  Bluetooth HCI BlueCard (PC Card) driver.
 	  This driver provides support for Bluetooth PCMCIA devices with
diff --git a/drivers/gpu/drm/gma500/Kconfig b/drivers/gpu/drm/gma500/Kconfig
index efb4a2dd2f8088..23b7c14de5e292 100644
--- a/drivers/gpu/drm/gma500/Kconfig
+++ b/drivers/gpu/drm/gma500/Kconfig
@@ -1,7 +1,7 @@
 # SPDX-License-Identifier: GPL-2.0-only
 config DRM_GMA500
 	tristate "Intel GMA500/600/3600/3650 KMS Framebuffer"
-	depends on DRM && PCI && X86 && MMU
+	depends on DRM && PCI && X86 && MMU && HAS_IOPORT
 	select DRM_KMS_HELPER
 	select FB_IOMEM_HELPERS if DRM_FBDEV_EMULATION
 	select I2C
diff --git a/drivers/gpu/drm/qxl/Kconfig b/drivers/gpu/drm/qxl/Kconfig
index ca3f51c2a8fe1a..17d6927e5e2340 100644
--- a/drivers/gpu/drm/qxl/Kconfig
+++ b/drivers/gpu/drm/qxl/Kconfig
@@ -1,7 +1,7 @@
 # SPDX-License-Identifier: GPL-2.0-only
 config DRM_QXL
 	tristate "QXL virtual GPU"
-	depends on DRM && PCI && MMU
+	depends on DRM && PCI && MMU && HAS_IOPORT
 	select DRM_KMS_HELPER
 	select DRM_TTM
 	select DRM_TTM_HELPER
diff --git a/drivers/gpu/drm/tiny/bochs.c b/drivers/gpu/drm/tiny/bochs.c
index 31fc5d839e106e..e738bb85831667 100644
--- a/drivers/gpu/drm/tiny/bochs.c
+++ b/drivers/gpu/drm/tiny/bochs.c
@@ -1,5 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
 
+#include <linux/bug.h>
 #include <linux/module.h>
 #include <linux/pci.h>
 
@@ -95,12 +96,17 @@ struct bochs_device {
 
 /* ---------------------------------------------------------------------- */
 
+static __always_inline bool bochs_uses_mmio(struct bochs_device *bochs)
+{
+	return !IS_ENABLED(CONFIG_HAS_IOPORT) || bochs->mmio;
+}
+
 static void bochs_vga_writeb(struct bochs_device *bochs, u16 ioport, u8 val)
 {
 	if (WARN_ON(ioport < 0x3c0 || ioport > 0x3df))
 		return;
 
-	if (bochs->mmio) {
+	if (bochs_uses_mmio(bochs)) {
 		int offset = ioport - 0x3c0 + 0x400;
 
 		writeb(val, bochs->mmio + offset);
@@ -114,7 +120,7 @@ static u8 bochs_vga_readb(struct bochs_device *bochs, u16 ioport)
 	if (WARN_ON(ioport < 0x3c0 || ioport > 0x3df))
 		return 0xff;
 
-	if (bochs->mmio) {
+	if (bochs_uses_mmio(bochs)) {
 		int offset = ioport - 0x3c0 + 0x400;
 
 		return readb(bochs->mmio + offset);
@@ -127,7 +133,7 @@ static u16 bochs_dispi_read(struct bochs_device *bochs, u16 reg)
 {
 	u16 ret = 0;
 
-	if (bochs->mmio) {
+	if (bochs_uses_mmio(bochs)) {
 		int offset = 0x500 + (reg << 1);
 
 		ret = readw(bochs->mmio + offset);
@@ -140,7 +146,7 @@ static u16 bochs_dispi_read(struct bochs_device *bochs, u16 reg)
 
 static void bochs_dispi_write(struct bochs_device *bochs, u16 reg, u16 val)
 {
-	if (bochs->mmio) {
+	if (bochs_uses_mmio(bochs)) {
 		int offset = 0x500 + (reg << 1);
 
 		writew(val, bochs->mmio + offset);
@@ -228,7 +234,7 @@ static int bochs_hw_init(struct drm_device *dev)
 			DRM_ERROR("Cannot map mmio region\n");
 			return -ENOMEM;
 		}
-	} else {
+	} else if (IS_ENABLED(CONFIG_HAS_IOPORT)) {
 		ioaddr = VBE_DISPI_IOPORT_INDEX;
 		iosize = 2;
 		if (!request_region(ioaddr, iosize, "bochs-drm")) {
@@ -236,6 +242,9 @@ static int bochs_hw_init(struct drm_device *dev)
 			return -EBUSY;
 		}
 		bochs->ioports = 1;
+	} else {
+		dev_err(dev->dev, "I/O ports are not supported\n");
+		return -EIO;
 	}
 
 	id = bochs_dispi_read(bochs, VBE_DISPI_INDEX_ID);
diff --git a/drivers/gpu/drm/tiny/cirrus.c b/drivers/gpu/drm/tiny/cirrus.c
index 751326e3d9c374..e31e1df029ab02 100644
--- a/drivers/gpu/drm/tiny/cirrus.c
+++ b/drivers/gpu/drm/tiny/cirrus.c
@@ -509,8 +509,10 @@ static void cirrus_crtc_helper_atomic_enable(struct drm_crtc *crtc,
 
 	cirrus_mode_set(cirrus, &crtc_state->mode);
 
+#ifdef CONFIG_HAS_IOPORT
 	/* Unblank (needed on S3 resume, vgabios doesn't do it then) */
 	outb(VGA_AR_ENABLE_DISPLAY, VGA_ATT_W);
+#endif
 
 	drm_dev_exit(idx);
 }
diff --git a/drivers/gpu/drm/xe/Kconfig b/drivers/gpu/drm/xe/Kconfig
index 7bbe46a98ff1f4..116f58774135fc 100644
--- a/drivers/gpu/drm/xe/Kconfig
+++ b/drivers/gpu/drm/xe/Kconfig
@@ -49,7 +49,7 @@ config DRM_XE
 
 config DRM_XE_DISPLAY
 	bool "Enable display support"
-	depends on DRM_XE && DRM_XE=m
+	depends on DRM_XE && DRM_XE=m && HAS_IOPORT
 	select FB_IOMEM_HELPERS
 	select I2C
 	select I2C_ALGOBIT
diff --git a/drivers/tty/Kconfig b/drivers/tty/Kconfig
index a45d423ad10f02..63a494d36a1fdc 100644
--- a/drivers/tty/Kconfig
+++ b/drivers/tty/Kconfig
@@ -220,7 +220,7 @@ config MOXA_INTELLIO
 
 config MOXA_SMARTIO
 	tristate "Moxa SmartIO support v. 2.0"
-	depends on SERIAL_NONSTANDARD && PCI
+	depends on SERIAL_NONSTANDARD && PCI && HAS_IOPORT
 	help
 	  Say Y here if you have a Moxa SmartIO multiport serial card and/or
 	  want to help develop a new version of this driver.
@@ -302,7 +302,7 @@ config GOLDFISH_TTY_EARLY_CONSOLE
 
 config IPWIRELESS
 	tristate "IPWireless 3G UMTS PCMCIA card support"
-	depends on PCMCIA && NETDEVICES
+	depends on PCMCIA && NETDEVICES && HAS_IOPORT
 	select PPP
 	help
 	  This is a driver for 3G UMTS PCMCIA card from IPWireless company. In
diff --git a/drivers/tty/serial/8250/8250_early.c b/drivers/tty/serial/8250/8250_early.c
index 6176083d0341ca..84242292176570 100644
--- a/drivers/tty/serial/8250/8250_early.c
+++ b/drivers/tty/serial/8250/8250_early.c
@@ -46,8 +46,10 @@ static unsigned int serial8250_early_in(struct uart_port *port, int offset)
 		return readl(port->membase + offset);
 	case UPIO_MEM32BE:
 		return ioread32be(port->membase + offset);
+#ifdef CONFIG_HAS_IOPORT
 	case UPIO_PORT:
 		return inb(port->iobase + offset);
+#endif
 	default:
 		return 0;
 	}
@@ -70,9 +72,11 @@ static void serial8250_early_out(struct uart_port *port, int offset, int value)
 	case UPIO_MEM32BE:
 		iowrite32be(value, port->membase + offset);
 		break;
+#ifdef CONFIG_HAS_IOPORT
 	case UPIO_PORT:
 		outb(value, port->iobase + offset);
 		break;
+#endif
 	}
 }
 
diff --git a/drivers/tty/serial/8250/8250_pci.c b/drivers/tty/serial/8250/8250_pci.c
index 6709b6a5f3011d..7d7a6d62c09cea 100644
--- a/drivers/tty/serial/8250/8250_pci.c
+++ b/drivers/tty/serial/8250/8250_pci.c
@@ -964,6 +964,9 @@ static int pci_ite887x_init(struct pci_dev *dev)
 	struct resource *iobase = NULL;
 	u32 miscr, uartbar, ioport;
 
+	if (!IS_ENABLED(CONFIG_HAS_IOPORT))
+		return serial_8250_warn_need_ioport(dev);
+
 	/* search for the base-ioport */
 	for (i = 0; i < ARRAY_SIZE(inta_addr); i++) {
 		iobase = request_region(inta_addr[i], ITE_887x_IOSIZE,
@@ -1514,6 +1517,9 @@ static int pci_quatech_init(struct pci_dev *dev)
 	const struct pci_device_id *match;
 	bool amcc = false;
 
+	if (!IS_ENABLED(CONFIG_HAS_IOPORT))
+		return serial_8250_warn_need_ioport(dev);
+
 	match = pci_match_id(quatech_cards, dev);
 	if (match)
 		amcc = match->driver_data;
@@ -1538,6 +1544,9 @@ static int pci_quatech_setup(struct serial_private *priv,
 		  const struct pciserial_board *board,
 		  struct uart_8250_port *port, int idx)
 {
+	if (!IS_ENABLED(CONFIG_HAS_IOPORT))
+		return serial_8250_warn_need_ioport(priv->dev);
+
 	/* Needed by pci_quatech calls below */
 	port->port.iobase = pci_resource_start(priv->dev, FL_GET_BASE(board->flags));
 	/* Set up the clocking */
@@ -1655,6 +1664,9 @@ static int pci_fintek_setup(struct serial_private *priv,
 	u8 config_base;
 	u16 iobase;
 
+	if (!IS_ENABLED(CONFIG_HAS_IOPORT))
+		return serial_8250_warn_need_ioport(pdev);
+
 	config_base = 0x40 + 0x08 * idx;
 
 	/* Get the io address from configuration space */
@@ -1686,6 +1698,9 @@ static int pci_fintek_init(struct pci_dev *dev)
 	u8 config_base;
 	struct serial_private *priv = pci_get_drvdata(dev);
 
+	if (!IS_ENABLED(CONFIG_HAS_IOPORT))
+		return serial_8250_warn_need_ioport(dev);
+
 	if (!(pci_resource_flags(dev, 5) & IORESOURCE_IO) ||
 			!(pci_resource_flags(dev, 4) & IORESOURCE_IO) ||
 			!(pci_resource_flags(dev, 3) & IORESOURCE_IO))
@@ -1864,6 +1879,9 @@ static int kt_serial_setup(struct serial_private *priv,
 			   const struct pciserial_board *board,
 			   struct uart_8250_port *port, int idx)
 {
+	if (!IS_ENABLED(CONFIG_HAS_IOPORT))
+		return serial_8250_warn_need_ioport(priv->dev);
+
 	port->port.flags |= UPF_BUG_THRE;
 	port->port.serial_in = kt_serial_in;
 	port->port.handle_break = kt_handle_break;
@@ -1884,6 +1902,9 @@ pci_wch_ch353_setup(struct serial_private *priv,
 		    const struct pciserial_board *board,
 		    struct uart_8250_port *port, int idx)
 {
+	if (!IS_ENABLED(CONFIG_HAS_IOPORT))
+		return serial_8250_warn_need_ioport(priv->dev);
+
 	port->port.flags |= UPF_FIXED_TYPE;
 	port->port.type = PORT_16550A;
 	return pci_default_setup(priv, board, port, idx);
@@ -1894,6 +1915,9 @@ pci_wch_ch355_setup(struct serial_private *priv,
 		const struct pciserial_board *board,
 		struct uart_8250_port *port, int idx)
 {
+	if (!IS_ENABLED(CONFIG_HAS_IOPORT))
+		return serial_8250_warn_need_ioport(priv->dev);
+
 	port->port.flags |= UPF_FIXED_TYPE;
 	port->port.type = PORT_16550A;
 	return pci_default_setup(priv, board, port, idx);
@@ -1904,6 +1928,9 @@ pci_wch_ch38x_setup(struct serial_private *priv,
 		    const struct pciserial_board *board,
 		    struct uart_8250_port *port, int idx)
 {
+	if (!IS_ENABLED(CONFIG_HAS_IOPORT))
+		return serial_8250_warn_need_ioport(priv->dev);
+
 	port->port.flags |= UPF_FIXED_TYPE;
 	port->port.type = PORT_16850;
 	return pci_default_setup(priv, board, port, idx);
@@ -1918,6 +1945,8 @@ static int pci_wch_ch38x_init(struct pci_dev *dev)
 	int max_port;
 	unsigned long iobase;
 
+	if (!IS_ENABLED(CONFIG_HAS_IOPORT))
+		return serial_8250_warn_need_ioport(dev);
 
 	switch (dev->device) {
 	case 0x3853: /* 8 ports */
@@ -1937,6 +1966,11 @@ static void pci_wch_ch38x_exit(struct pci_dev *dev)
 {
 	unsigned long iobase;
 
+	if (!IS_ENABLED(CONFIG_HAS_IOPORT)) {
+		serial_8250_warn_need_ioport(dev);
+		return;
+	}
+
 	iobase = pci_resource_start(dev, 0);
 	outb(0x0, iobase + CH384_XINT_ENABLE_REG);
 }
@@ -2052,6 +2086,9 @@ static int pci_moxa_init(struct pci_dev *dev)
 	unsigned int i, num_ports = moxa_get_nports(device);
 	u8 val, init_mode = MOXA_RS232;
 
+	if (!IS_ENABLED(CONFIG_HAS_IOPORT))
+		return serial_8250_warn_need_ioport(dev);
+
 	if (!(pci_moxa_supported_rs(dev) & MOXA_SUPP_RS232)) {
 		init_mode = MOXA_RS422;
 	}
@@ -2084,6 +2121,9 @@ pci_moxa_setup(struct serial_private *priv,
 	unsigned int bar = FL_GET_BASE(board->flags);
 	int offset;
 
+	if (!IS_ENABLED(CONFIG_HAS_IOPORT))
+		return serial_8250_warn_need_ioport(priv->dev);
+
 	if (board->num_ports == 4 && idx == 3)
 		offset = 7 * board->uart_offset;
 	else
diff --git a/drivers/tty/serial/8250/8250_pcilib.c b/drivers/tty/serial/8250/8250_pcilib.c
index ea906d721b2c3e..3bdccf76f71d6a 100644
--- a/drivers/tty/serial/8250/8250_pcilib.c
+++ b/drivers/tty/serial/8250/8250_pcilib.c
@@ -12,6 +12,15 @@
 #include "8250.h"
 #include "8250_pcilib.h"
 
+int serial_8250_warn_need_ioport(struct pci_dev *dev)
+{
+	dev_warn(&dev->dev,
+		 "Serial port not supported because of missing I/O resource\n");
+
+	return -ENXIO;
+}
+EXPORT_SYMBOL_NS_GPL(serial_8250_warn_need_ioport, SERIAL_8250_PCI);
+
 int serial8250_pci_setup_port(struct pci_dev *dev, struct uart_8250_port *port,
 		   u8 bar, unsigned int offset, int regshift)
 {
@@ -27,12 +36,14 @@ int serial8250_pci_setup_port(struct pci_dev *dev, struct uart_8250_port *port,
 		port->port.mapbase = pci_resource_start(dev, bar) + offset;
 		port->port.membase = pcim_iomap_table(dev)[bar] + offset;
 		port->port.regshift = regshift;
-	} else {
+	} else if (IS_ENABLED(CONFIG_HAS_IOPORT)) {
 		port->port.iotype = UPIO_PORT;
 		port->port.iobase = pci_resource_start(dev, bar) + offset;
 		port->port.mapbase = 0;
 		port->port.membase = NULL;
 		port->port.regshift = 0;
+	} else {
+		return serial_8250_warn_need_ioport(dev);
 	}
 	return 0;
 }
diff --git a/drivers/tty/serial/8250/8250_pcilib.h b/drivers/tty/serial/8250/8250_pcilib.h
index 1aaf1b50ce9cc9..16a274574cdef9 100644
--- a/drivers/tty/serial/8250/8250_pcilib.h
+++ b/drivers/tty/serial/8250/8250_pcilib.h
@@ -13,3 +13,5 @@ struct uart_8250_port;
 
 int serial8250_pci_setup_port(struct pci_dev *dev, struct uart_8250_port *port, u8 bar,
 		   unsigned int offset, int regshift);
+
+int serial_8250_warn_need_ioport(struct pci_dev *dev);
diff --git a/drivers/tty/serial/8250/8250_port.c b/drivers/tty/serial/8250/8250_port.c
index 0b886c0924daee..4d63d80e78a92c 100644
--- a/drivers/tty/serial/8250/8250_port.c
+++ b/drivers/tty/serial/8250/8250_port.c
@@ -338,6 +338,7 @@ static void default_serial_dl_write(struct uart_8250_port *up, u32 value)
 	serial_out(up, UART_DLM, value >> 8 & 0xff);
 }
 
+#ifdef CONFIG_HAS_IOPORT
 static unsigned int hub6_serial_in(struct uart_port *p, int offset)
 {
 	offset = offset << p->regshift;
@@ -351,6 +352,7 @@ static void hub6_serial_out(struct uart_port *p, int offset, int value)
 	outb(p->hub6 - 1 + offset, p->iobase);
 	outb(value, p->iobase + 1);
 }
+#endif /* CONFIG_HAS_IOPORT */
 
 static unsigned int mem_serial_in(struct uart_port *p, int offset)
 {
@@ -400,6 +402,7 @@ static unsigned int mem32be_serial_in(struct uart_port *p, int offset)
 	return ioread32be(p->membase + offset);
 }
 
+#ifdef CONFIG_HAS_IOPORT
 static unsigned int io_serial_in(struct uart_port *p, int offset)
 {
 	offset = offset << p->regshift;
@@ -411,6 +414,15 @@ static void io_serial_out(struct uart_port *p, int offset, int value)
 	offset = offset << p->regshift;
 	outb(value, p->iobase + offset);
 }
+#endif
+static unsigned int no_serial_in(struct uart_port *p, int offset)
+{
+	return (unsigned int)-1;
+}
+
+static void no_serial_out(struct uart_port *p, int offset, int value)
+{
+}
 
 static int serial8250_default_handle_irq(struct uart_port *port);
 
@@ -422,10 +434,12 @@ static void set_io_from_upio(struct uart_port *p)
 	up->dl_write = default_serial_dl_write;
 
 	switch (p->iotype) {
+#ifdef CONFIG_HAS_IOPORT
 	case UPIO_HUB6:
 		p->serial_in = hub6_serial_in;
 		p->serial_out = hub6_serial_out;
 		break;
+#endif
 
 	case UPIO_MEM:
 		p->serial_in = mem_serial_in;
@@ -446,11 +460,16 @@ static void set_io_from_upio(struct uart_port *p)
 		p->serial_in = mem32be_serial_in;
 		p->serial_out = mem32be_serial_out;
 		break;
-
-	default:
+#ifdef CONFIG_HAS_IOPORT
+	case UPIO_PORT:
 		p->serial_in = io_serial_in;
 		p->serial_out = io_serial_out;
 		break;
+#endif
+	default:
+		WARN(1, "Unsupported UART type %x\n", p->iotype);
+		p->serial_in = no_serial_in;
+		p->serial_out = no_serial_out;
 	}
 	/* Remember loaded iotype */
 	up->cur_iotype = p->iotype;
@@ -1174,7 +1193,7 @@ static void autoconfig(struct uart_8250_port *up)
 		 */
 		scratch = serial_in(up, UART_IER);
 		serial_out(up, UART_IER, 0);
-#ifdef __i386__
+#if defined(__i386__) && defined(CONFIG_HAS_IOPORT)
 		outb(0xff, 0x080);
 #endif
 		/*
@@ -1183,7 +1202,7 @@ static void autoconfig(struct uart_8250_port *up)
 		 */
 		scratch2 = serial_in(up, UART_IER) & UART_IER_ALL_INTR;
 		serial_out(up, UART_IER, UART_IER_ALL_INTR);
-#ifdef __i386__
+#if defined(__i386__) && defined(CONFIG_HAS_IOPORT)
 		outb(0, 0x080);
 #endif
 		scratch3 = serial_in(up, UART_IER) & UART_IER_ALL_INTR;
diff --git a/drivers/tty/serial/8250/Kconfig b/drivers/tty/serial/8250/Kconfig
index 47ff50763c048c..1eb20350fcf432 100644
--- a/drivers/tty/serial/8250/Kconfig
+++ b/drivers/tty/serial/8250/Kconfig
@@ -72,7 +72,7 @@ config SERIAL_8250_16550A_VARIANTS
 
 config SERIAL_8250_FINTEK
 	bool "Support for Fintek variants"
-	depends on SERIAL_8250
+	depends on SERIAL_8250 && HAS_IOPORT
 	help
 	  Selecting this option will add support for the RS232 and RS485
 	  capabilities of the Fintek F81216A LPC to 4 UART as well similar
@@ -163,7 +163,7 @@ config SERIAL_8250_HP300
 
 config SERIAL_8250_CS
 	tristate "8250/16550 PCMCIA device support"
-	depends on PCMCIA && SERIAL_8250
+	depends on PCMCIA && SERIAL_8250 && HAS_IOPORT
 	help
 	  Say Y here to enable support for 16-bit PCMCIA serial devices,
 	  including serial port cards, modems, and the modem functions of
diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig
index 28e4beeabf8f37..45f0f779fbf960 100644
--- a/drivers/tty/serial/Kconfig
+++ b/drivers/tty/serial/Kconfig
@@ -877,7 +877,7 @@ config SERIAL_TXX9_STDSERIAL
 
 config SERIAL_JSM
 	tristate "Digi International NEO and Classic PCI Support"
-	depends on PCI
+	depends on PCI && HAS_IOPORT
 	select SERIAL_CORE
 	help
 	  This is a driver for Digi International's Neo and Classic series
diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig
index 755cf355954049..2333476a42c02b 100644
--- a/drivers/watchdog/Kconfig
+++ b/drivers/watchdog/Kconfig
@@ -1519,7 +1519,7 @@ config 60XX_WDT
 
 config SBC8360_WDT
 	tristate "SBC8360 Watchdog Timer"
-	depends on X86_32
+	depends on X86_32 && HAS_IOPORT
 	help
 
 	  This is the driver for the hardware watchdog on the SBC8360 Single
@@ -1532,7 +1532,7 @@ config SBC8360_WDT
 
 config SBC7240_WDT
 	tristate "SBC Nano 7240 Watchdog Timer"
-	depends on X86_32 && !UML
+	depends on X86_32 && HAS_IOPORT
 	help
 	  This is the driver for the hardware watchdog found on the IEI
 	  single board computers EPIC Nano 7240 (and likely others). This
diff --git a/include/asm-generic/div64.h b/include/asm-generic/div64.h
index 13f5aa68a4552a..25e7b4b58dcf55 100644
--- a/include/asm-generic/div64.h
+++ b/include/asm-generic/div64.h
@@ -74,7 +74,8 @@
 	 * do the trick here).						\
 	 */								\
 	uint64_t ___res, ___x, ___t, ___m, ___n = (n);			\
-	uint32_t ___p, ___bias;						\
+	uint32_t ___p;							\
+	bool ___bias = false;						\
 									\
 	/* determine MSB of b */					\
 	___p = 1 << ilog2(___b);					\
@@ -87,22 +88,14 @@
 	___x = ~0ULL / ___b * ___b - 1;					\
 									\
 	/* test our ___m with res = m * x / (p << 64) */		\
-	___res = ((___m & 0xffffffff) * (___x & 0xffffffff)) >> 32;	\
-	___t = ___res += (___m & 0xffffffff) * (___x >> 32);		\
-	___res += (___x & 0xffffffff) * (___m >> 32);			\
-	___t = (___res < ___t) ? (1ULL << 32) : 0;			\
-	___res = (___res >> 32) + ___t;					\
-	___res += (___m >> 32) * (___x >> 32);				\
-	___res /= ___p;							\
+	___res = (___m & 0xffffffff) * (___x & 0xffffffff);		\
+	___t = (___m & 0xffffffff) * (___x >> 32) + (___res >> 32);	\
+	___res = (___m >> 32) * (___x >> 32) + (___t >> 32);		\
+	___t = (___m >> 32) * (___x & 0xffffffff) + (___t & 0xffffffff);\
+	___res = (___res + (___t >> 32)) / ___p;			\
 									\
-	/* Now sanitize and optimize what we've got. */			\
-	if (~0ULL % (___b / (___b & -___b)) == 0) {			\
-		/* special case, can be simplified to ... */		\
-		___n /= (___b & -___b);					\
-		___m = ~0ULL / (___b / (___b & -___b));			\
-		___p = 1;						\
-		___bias = 1;						\
-	} else if (___res != ___x / ___b) {				\
+	/* Now validate what we've got. */				\
+	if (___res != ___x / ___b) {					\
 		/*							\
 		 * We can't get away without a bias to compensate	\
 		 * for bit truncation errors.  To avoid it we'd need an	\
@@ -111,45 +104,18 @@
 		 *							\
 		 * Instead we do m = p / b and n / b = (n * m + m) / p.	\
 		 */							\
-		___bias = 1;						\
+		___bias = true;						\
 		/* Compute m = (p << 64) / b */				\
 		___m = (~0ULL / ___b) * ___p;				\
 		___m += ((~0ULL % ___b + 1) * ___p) / ___b;		\
-	} else {							\
-		/*							\
-		 * Reduce m / p, and try to clear bit 31 of m when	\
-		 * possible, otherwise that'll need extra overflow	\
-		 * handling later.					\
-		 */							\
-		uint32_t ___bits = -(___m & -___m);			\
-		___bits |= ___m >> 32;					\
-		___bits = (~___bits) << 1;				\
-		/*							\
-		 * If ___bits == 0 then setting bit 31 is  unavoidable.	\
-		 * Simply apply the maximum possible reduction in that	\
-		 * case. Otherwise the MSB of ___bits indicates the	\
-		 * best reduction we should apply.			\
-		 */							\
-		if (!___bits) {						\
-			___p /= (___m & -___m);				\
-			___m /= (___m & -___m);				\
-		} else {						\
-			___p >>= ilog2(___bits);			\
-			___m >>= ilog2(___bits);			\
-		}							\
-		/* No bias needed. */					\
-		___bias = 0;						\
 	}								\
 									\
+	/* Reduce m / p to help avoid overflow handling later. */	\
+	___p /= (___m & -___m);						\
+	___m /= (___m & -___m);						\
+									\
 	/*								\
-	 * Now we have a combination of 2 conditions:			\
-	 *								\
-	 * 1) whether or not we need to apply a bias, and		\
-	 *								\
-	 * 2) whether or not there might be an overflow in the cross	\
-	 *    product determined by (___m & ((1 << 63) | (1 << 31))).	\
-	 *								\
-	 * Select the best way to do (m_bias + m * n) / (1 << 64).	\
+	 * Perform (m_bias + m * n) / (1 << 64).			\
 	 * From now on there will be actual runtime code generated.	\
 	 */								\
 	___res = __arch_xprod_64(___m, ___n, ___bias);			\
@@ -165,47 +131,42 @@
  * Semantic:  retval = ((bias ? m : 0) + m * n) >> 64
  *
  * The product is a 128-bit value, scaled down to 64 bits.
- * Assuming constant propagation to optimize away unused conditional code.
+ * Hoping for compile-time optimization of  conditional code.
  * Architectures may provide their own optimized assembly implementation.
  */
-static inline uint64_t __arch_xprod_64(const uint64_t m, uint64_t n, bool bias)
+#ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE
+static __always_inline
+#else
+static inline
+#endif
+uint64_t __arch_xprod_64(const uint64_t m, uint64_t n, bool bias)
 {
 	uint32_t m_lo = m;
 	uint32_t m_hi = m >> 32;
 	uint32_t n_lo = n;
 	uint32_t n_hi = n >> 32;
-	uint64_t res;
-	uint32_t res_lo, res_hi, tmp;
-
-	if (!bias) {
-		res = ((uint64_t)m_lo * n_lo) >> 32;
-	} else if (!(m & ((1ULL << 63) | (1ULL << 31)))) {
-		/* there can't be any overflow here */
-		res = (m + (uint64_t)m_lo * n_lo) >> 32;
+	uint64_t x, y;
+
+	/* Determine if overflow handling can be dispensed with. */
+	bool no_ovf = __builtin_constant_p(m) &&
+		      ((m >> 32) + (m & 0xffffffff) < 0x100000000);
+
+	if (no_ovf) {
+		x = (uint64_t)m_lo * n_lo + (bias ? m : 0);
+		x >>= 32;
+		x += (uint64_t)m_lo * n_hi;
+		x += (uint64_t)m_hi * n_lo;
+		x >>= 32;
+		x += (uint64_t)m_hi * n_hi;
 	} else {
-		res = m + (uint64_t)m_lo * n_lo;
-		res_lo = res >> 32;
-		res_hi = (res_lo < m_hi);
-		res = res_lo | ((uint64_t)res_hi << 32);
+		x = (uint64_t)m_lo * n_lo + (bias ? m_lo : 0);
+		y = (uint64_t)m_lo * n_hi + (uint32_t)(x >> 32) + (bias ? m_hi : 0);
+		x = (uint64_t)m_hi * n_hi + (uint32_t)(y >> 32);
+		y = (uint64_t)m_hi * n_lo + (uint32_t)y;
+		x += (uint32_t)(y >> 32);
 	}
 
-	if (!(m & ((1ULL << 63) | (1ULL << 31)))) {
-		/* there can't be any overflow here */
-		res += (uint64_t)m_lo * n_hi;
-		res += (uint64_t)m_hi * n_lo;
-		res >>= 32;
-	} else {
-		res += (uint64_t)m_lo * n_hi;
-		tmp = res >> 32;
-		res += (uint64_t)m_hi * n_lo;
-		res_lo = res >> 32;
-		res_hi = (res_lo < tmp);
-		res = res_lo | ((uint64_t)res_hi << 32);
-	}
-
-	res += (uint64_t)m_hi * n_hi;
-
-	return res;
+	return x;
 }
 #endif
 
diff --git a/include/asm-generic/io.h b/include/asm-generic/io.h
index 80de699bf6af4b..a5cbbf3e26ec7d 100644
--- a/include/asm-generic/io.h
+++ b/include/asm-generic/io.h
@@ -540,6 +540,7 @@ static inline void writesq(volatile void __iomem *addr, const void *buffer,
 
 #if !defined(inb) && !defined(_inb)
 #define _inb _inb
+#ifdef CONFIG_HAS_IOPORT
 static inline u8 _inb(unsigned long addr)
 {
 	u8 val;
@@ -549,10 +550,15 @@ static inline u8 _inb(unsigned long addr)
 	__io_par(val);
 	return val;
 }
+#else
+u8 _inb(unsigned long addr)
+	__compiletime_error("inb()) requires CONFIG_HAS_IOPORT");
+#endif
 #endif
 
 #if !defined(inw) && !defined(_inw)
 #define _inw _inw
+#ifdef CONFIG_HAS_IOPORT
 static inline u16 _inw(unsigned long addr)
 {
 	u16 val;
@@ -562,10 +568,15 @@ static inline u16 _inw(unsigned long addr)
 	__io_par(val);
 	return val;
 }
+#else
+u16 _inw(unsigned long addr)
+	__compiletime_error("inw() requires CONFIG_HAS_IOPORT");
+#endif
 #endif
 
 #if !defined(inl) && !defined(_inl)
 #define _inl _inl
+#ifdef CONFIG_HAS_IOPORT
 static inline u32 _inl(unsigned long addr)
 {
 	u32 val;
@@ -575,36 +586,55 @@ static inline u32 _inl(unsigned long addr)
 	__io_par(val);
 	return val;
 }
+#else
+u32 _inl(unsigned long addr)
+	__compiletime_error("inl() requires CONFIG_HAS_IOPORT");
+#endif
 #endif
 
 #if !defined(outb) && !defined(_outb)
 #define _outb _outb
+#ifdef CONFIG_HAS_IOPORT
 static inline void _outb(u8 value, unsigned long addr)
 {
 	__io_pbw();
 	__raw_writeb(value, PCI_IOBASE + addr);
 	__io_paw();
 }
+#else
+void _outb(u8 value, unsigned long addr)
+	__compiletime_error("outb() requires CONFIG_HAS_IOPORT");
+#endif
 #endif
 
 #if !defined(outw) && !defined(_outw)
 #define _outw _outw
+#ifdef CONFIG_HAS_IOPORT
 static inline void _outw(u16 value, unsigned long addr)
 {
 	__io_pbw();
 	__raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
 	__io_paw();
 }
+#else
+void _outw(u16 value, unsigned long addr)
+	__compiletime_error("outw() requires CONFIG_HAS_IOPORT");
+#endif
 #endif
 
 #if !defined(outl) && !defined(_outl)
 #define _outl _outl
+#ifdef CONFIG_HAS_IOPORT
 static inline void _outl(u32 value, unsigned long addr)
 {
 	__io_pbw();
 	__raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
 	__io_paw();
 }
+#else
+void _outl(u32 value, unsigned long addr)
+	__compiletime_error("outl() requires CONFIG_HAS_IOPORT");
+#endif
 #endif
 
 #include <linux/logic_pio.h>
@@ -688,53 +718,83 @@ static inline void outl_p(u32 value, unsigned long addr)
 
 #ifndef insb
 #define insb insb
+#ifdef CONFIG_HAS_IOPORT
 static inline void insb(unsigned long addr, void *buffer, unsigned int count)
 {
 	readsb(PCI_IOBASE + addr, buffer, count);
 }
+#else
+void insb(unsigned long addr, void *buffer, unsigned int count)
+	__compiletime_error("insb() requires HAS_IOPORT");
+#endif
 #endif
 
 #ifndef insw
 #define insw insw
+#ifdef CONFIG_HAS_IOPORT
 static inline void insw(unsigned long addr, void *buffer, unsigned int count)
 {
 	readsw(PCI_IOBASE + addr, buffer, count);
 }
+#else
+void insw(unsigned long addr, void *buffer, unsigned int count)
+	__compiletime_error("insw() requires HAS_IOPORT");
+#endif
 #endif
 
 #ifndef insl
 #define insl insl
+#ifdef CONFIG_HAS_IOPORT
 static inline void insl(unsigned long addr, void *buffer, unsigned int count)
 {
 	readsl(PCI_IOBASE + addr, buffer, count);
 }
+#else
+void insl(unsigned long addr, void *buffer, unsigned int count)
+	__compiletime_error("insl() requires HAS_IOPORT");
+#endif
 #endif
 
 #ifndef outsb
 #define outsb outsb
+#ifdef CONFIG_HAS_IOPORT
 static inline void outsb(unsigned long addr, const void *buffer,
 			 unsigned int count)
 {
 	writesb(PCI_IOBASE + addr, buffer, count);
 }
+#else
+void outsb(unsigned long addr, const void *buffer, unsigned int count)
+	__compiletime_error("outsb() requires HAS_IOPORT");
+#endif
 #endif
 
 #ifndef outsw
 #define outsw outsw
+#ifdef CONFIG_HAS_IOPORT
 static inline void outsw(unsigned long addr, const void *buffer,
 			 unsigned int count)
 {
 	writesw(PCI_IOBASE + addr, buffer, count);
 }
+#else
+void outsw(unsigned long addr, const void *buffer, unsigned int count)
+	__compiletime_error("outsw() requires HAS_IOPORT");
+#endif
 #endif
 
 #ifndef outsl
 #define outsl outsl
+#ifdef CONFIG_HAS_IOPORT
 static inline void outsl(unsigned long addr, const void *buffer,
 			 unsigned int count)
 {
 	writesl(PCI_IOBASE + addr, buffer, count);
 }
+#else
+void outsl(unsigned long addr, const void *buffer, unsigned int count)
+	__compiletime_error("outsl() requires HAS_IOPORT");
+#endif
 #endif
 
 #ifndef insb_p
@@ -1151,7 +1211,6 @@ static inline void unxlate_dev_mem_ptr(phys_addr_t phys, void *addr)
 #endif
 
 #ifndef memset_io
-#define memset_io memset_io
 /**
  * memset_io	Set a range of I/O memory to a constant value
  * @addr:	The beginning of the I/O-memory range to set
@@ -1160,15 +1219,10 @@ static inline void unxlate_dev_mem_ptr(phys_addr_t phys, void *addr)
  *
  * Set a range of I/O memory to a given value.
  */
-static inline void memset_io(volatile void __iomem *addr, int value,
-			     size_t size)
-{
-	memset(__io_virt(addr), value, size);
-}
+void memset_io(volatile void __iomem *addr, int val, size_t count);
 #endif
 
 #ifndef memcpy_fromio
-#define memcpy_fromio memcpy_fromio
 /**
  * memcpy_fromio	Copy a block of data from I/O memory
  * @dst:		The (RAM) destination for the copy
@@ -1177,16 +1231,10 @@ static inline void memset_io(volatile void __iomem *addr, int value,
  *
  * Copy a block of data from I/O memory.
  */
-static inline void memcpy_fromio(void *buffer,
-				 const volatile void __iomem *addr,
-				 size_t size)
-{
-	memcpy(buffer, __io_virt(addr), size);
-}
+void memcpy_fromio(void *dst, const volatile void __iomem *src, size_t count);
 #endif
 
 #ifndef memcpy_toio
-#define memcpy_toio memcpy_toio
 /**
  * memcpy_toio		Copy a block of data into I/O memory
  * @dst:		The (I/O memory) destination for the copy
@@ -1195,11 +1243,7 @@ static inline void memcpy_fromio(void *buffer,
  *
  * Copy a block of data to I/O memory.
  */
-static inline void memcpy_toio(volatile void __iomem *addr, const void *buffer,
-			       size_t size)
-{
-	memcpy(__io_virt(addr), buffer, size);
-}
+void memcpy_toio(volatile void __iomem *dst, const void *src, size_t count);
 #endif
 
 extern int devmem_is_allowed(unsigned long pfn);
diff --git a/include/asm-generic/memory_model.h b/include/asm-generic/memory_model.h
index 6796abe1900e30..6d1fb6162ac1a6 100644
--- a/include/asm-generic/memory_model.h
+++ b/include/asm-generic/memory_model.h
@@ -64,6 +64,19 @@ static inline int pfn_valid(unsigned long pfn)
 #define page_to_pfn __page_to_pfn
 #define pfn_to_page __pfn_to_page
 
+#ifdef CONFIG_DEBUG_VIRTUAL
+#define page_to_phys(page)						\
+({									\
+	unsigned long __pfn = page_to_pfn(page);			\
+									\
+	WARN_ON_ONCE(!pfn_valid(__pfn));				\
+	PFN_PHYS(__pfn);						\
+})
+#else
+#define page_to_phys(page)	PFN_PHYS(page_to_pfn(page))
+#endif /* CONFIG_DEBUG_VIRTUAL */
+#define phys_to_page(phys)	pfn_to_page(PHYS_PFN(phys))
+
 #endif /* __ASSEMBLY__ */
 
 #endif
diff --git a/include/asm-generic/vga.h b/include/asm-generic/vga.h
index adf91a783b5c15..5dcaf4ae904a22 100644
--- a/include/asm-generic/vga.h
+++ b/include/asm-generic/vga.h
@@ -1,25 +1,4 @@
 /* SPDX-License-Identifier: GPL-2.0 */
-/*
- *	Access to VGA videoram
- *
- *	(c) 1998 Martin Mares <mj@ucw.cz>
- */
 #ifndef __ASM_GENERIC_VGA_H
 #define __ASM_GENERIC_VGA_H
-
-/*
- *	On most architectures that support VGA, we can just
- *	recalculate addresses and then access the videoram
- *	directly without any black magic.
- *
- *	Everyone else needs to ioremap the address and use
- *	proper I/O accesses.
- */
-#ifndef VGA_MAP_MEM
-#define VGA_MAP_MEM(x, s) (unsigned long)phys_to_virt(x)
-#endif
-
-#define vga_readb(x) (*(x))
-#define vga_writeb(x, y) (*(y) = (x))
-
-#endif /* _ASM_GENERIC_VGA_H */
+#endif /* __ASM_GENERIC_VGA_H */
diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h
index 4ab65874a850b4..743b4afaad4c89 100644
--- a/include/linux/serial_core.h
+++ b/include/linux/serial_core.h
@@ -505,7 +505,11 @@ struct uart_port {
 	 * The remaining bits are serial-core specific and not modifiable by
 	 * userspace.
 	 */
+#ifdef CONFIG_HAS_IOPORT
 #define UPF_FOURPORT		((__force upf_t) ASYNC_FOURPORT       /* 1  */ )
+#else
+#define UPF_FOURPORT		0
+#endif
 #define UPF_SAK			((__force upf_t) ASYNC_SAK            /* 2  */ )
 #define UPF_SPD_HI		((__force upf_t) ASYNC_SPD_HI         /* 4  */ )
 #define UPF_SPD_VHI		((__force upf_t) ASYNC_SPD_VHI        /* 5  */ )
diff --git a/include/linux/vt_buffer.h b/include/linux/vt_buffer.h
index 919d999a8c1db2..b6eeb8cb60705c 100644
--- a/include/linux/vt_buffer.h
+++ b/include/linux/vt_buffer.h
@@ -28,45 +28,21 @@
 #ifndef VT_BUF_HAVE_MEMSETW
 static inline void scr_memsetw(u16 *s, u16 c, unsigned int count)
 {
-#ifdef VT_BUF_HAVE_RW
-	count /= 2;
-	while (count--)
-		scr_writew(c, s++);
-#else
 	memset16(s, c, count / 2);
-#endif
 }
 #endif
 
 #ifndef VT_BUF_HAVE_MEMCPYW
 static inline void scr_memcpyw(u16 *d, const u16 *s, unsigned int count)
 {
-#ifdef VT_BUF_HAVE_RW
-	count /= 2;
-	while (count--)
-		scr_writew(scr_readw(s++), d++);
-#else
 	memcpy(d, s, count);
-#endif
 }
 #endif
 
 #ifndef VT_BUF_HAVE_MEMMOVEW
 static inline void scr_memmovew(u16 *d, const u16 *s, unsigned int count)
 {
-#ifdef VT_BUF_HAVE_RW
-	if (d < s)
-		scr_memcpyw(d, s, count);
-	else {
-		count /= 2;
-		d += count;
-		s += count;
-		while (count--)
-			scr_writew(scr_readw(--s), --d);
-	}
-#else
 	memmove(d, s, count);
-#endif
 }
 #endif
 
diff --git a/include/uapi/asm-generic/ioctl.h b/include/uapi/asm-generic/ioctl.h
index a84f4db8a25050..e3290a5824c901 100644
--- a/include/uapi/asm-generic/ioctl.h
+++ b/include/uapi/asm-generic/ioctl.h
@@ -82,13 +82,13 @@
  * NOTE: _IOW means userland is writing and kernel is reading. _IOR
  * means userland is reading and kernel is writing.
  */
-#define _IO(type,nr)		_IOC(_IOC_NONE,(type),(nr),0)
-#define _IOR(type,nr,size)	_IOC(_IOC_READ,(type),(nr),(_IOC_TYPECHECK(size)))
-#define _IOW(type,nr,size)	_IOC(_IOC_WRITE,(type),(nr),(_IOC_TYPECHECK(size)))
-#define _IOWR(type,nr,size)	_IOC(_IOC_READ|_IOC_WRITE,(type),(nr),(_IOC_TYPECHECK(size)))
-#define _IOR_BAD(type,nr,size)	_IOC(_IOC_READ,(type),(nr),sizeof(size))
-#define _IOW_BAD(type,nr,size)	_IOC(_IOC_WRITE,(type),(nr),sizeof(size))
-#define _IOWR_BAD(type,nr,size)	_IOC(_IOC_READ|_IOC_WRITE,(type),(nr),sizeof(size))
+#define _IO(type,nr)			_IOC(_IOC_NONE,(type),(nr),0)
+#define _IOR(type,nr,argtype)		_IOC(_IOC_READ,(type),(nr),(_IOC_TYPECHECK(argtype)))
+#define _IOW(type,nr,argtype)		_IOC(_IOC_WRITE,(type),(nr),(_IOC_TYPECHECK(argtype)))
+#define _IOWR(type,nr,argtype)		_IOC(_IOC_READ|_IOC_WRITE,(type),(nr),(_IOC_TYPECHECK(argtype)))
+#define _IOR_BAD(type,nr,argtype)	_IOC(_IOC_READ,(type),(nr),sizeof(argtype))
+#define _IOW_BAD(type,nr,argtype)	_IOC(_IOC_WRITE,(type),(nr),sizeof(argtype))
+#define _IOWR_BAD(type,nr,argtype)	_IOC(_IOC_READ|_IOC_WRITE,(type),(nr),sizeof(argtype))
 
 /* used to decode ioctl numbers.. */
 #define _IOC_DIR(nr)		(((nr) >> _IOC_DIRSHIFT) & _IOC_DIRMASK)
diff --git a/lib/Makefile b/lib/Makefile
index 773adf88af4166..db4717538fadf1 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -35,7 +35,7 @@ lib-y := ctype.o string.o vsprintf.o cmdline.o \
 	 is_single_threaded.o plist.o decompress.o kobject_uevent.o \
 	 earlycpio.o seq_buf.o siphash.o dec_and_lock.o \
 	 nmi_backtrace.o win_minmax.o memcat_p.o \
-	 buildid.o objpool.o union_find.o
+	 buildid.o objpool.o union_find.o iomem_copy.o
 
 lib-$(CONFIG_PRINTK) += dump_stack.o
 lib-$(CONFIG_SMP) += cpumask.o
diff --git a/lib/iomem_copy.c b/lib/iomem_copy.c
new file mode 100644
index 00000000000000..dec7eaea60e02b
--- /dev/null
+++ b/lib/iomem_copy.c
@@ -0,0 +1,136 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright 2024 Kalray, Inc.  All Rights Reserved.
+ */
+
+#include <linux/align.h>
+#include <linux/export.h>
+#include <linux/io.h>
+#include <linux/types.h>
+#include <linux/unaligned.h>
+
+#ifndef memset_io
+/**
+ * memset_io() - Set a range of I/O memory to a constant value
+ * @addr: The beginning of the I/O-memory range to set
+ * @val: The value to set the memory to
+ * @count: The number of bytes to set
+ *
+ * Set a range of I/O memory to a given value.
+ */
+void memset_io(volatile void __iomem *addr, int val, size_t count)
+{
+	long qc = (u8)val;
+
+	qc *= ~0UL / 0xff;
+
+	while (count && !IS_ALIGNED((long)addr, sizeof(long))) {
+		__raw_writeb(val, addr);
+		addr++;
+		count--;
+	}
+
+	while (count >= sizeof(long)) {
+#ifdef CONFIG_64BIT
+		__raw_writeq(qc, addr);
+#else
+		__raw_writel(qc, addr);
+#endif
+
+		addr += sizeof(long);
+		count -= sizeof(long);
+	}
+
+	while (count) {
+		__raw_writeb(val, addr);
+		addr++;
+		count--;
+	}
+}
+EXPORT_SYMBOL(memset_io);
+#endif
+
+#ifndef memcpy_fromio
+/**
+ * memcpy_fromio() - Copy a block of data from I/O memory
+ * @dst: The (RAM) destination for the copy
+ * @src: The (I/O memory) source for the data
+ * @count: The number of bytes to copy
+ *
+ * Copy a block of data from I/O memory.
+ */
+void memcpy_fromio(void *dst, const volatile void __iomem *src, size_t count)
+{
+	while (count && !IS_ALIGNED((long)src, sizeof(long))) {
+		*(u8 *)dst = __raw_readb(src);
+		src++;
+		dst++;
+		count--;
+	}
+
+	while (count >= sizeof(long)) {
+#ifdef CONFIG_64BIT
+		long val = __raw_readq(src);
+#else
+		long val = __raw_readl(src);
+#endif
+		put_unaligned(val, (long *)dst);
+
+
+		src += sizeof(long);
+		dst += sizeof(long);
+		count -= sizeof(long);
+	}
+
+	while (count) {
+		*(u8 *)dst = __raw_readb(src);
+		src++;
+		dst++;
+		count--;
+	}
+}
+EXPORT_SYMBOL(memcpy_fromio);
+#endif
+
+#ifndef memcpy_toio
+/**
+ * memcpy_toio() -Copy a block of data into I/O memory
+ * @dst: The (I/O memory) destination for the copy
+ * @src: The (RAM) source for the data
+ * @count: The number of bytes to copy
+ *
+ * Copy a block of data to I/O memory.
+ */
+void memcpy_toio(volatile void __iomem *dst, const void *src, size_t count)
+{
+	while (count && !IS_ALIGNED((long)dst, sizeof(long))) {
+		__raw_writeb(*(u8 *)src, dst);
+		src++;
+		dst++;
+		count--;
+	}
+
+	while (count >= sizeof(long)) {
+		long val = get_unaligned((long *)src);
+#ifdef CONFIG_64BIT
+		__raw_writeq(val, dst);
+#else
+		__raw_writel(val, dst);
+#endif
+
+		src += sizeof(long);
+		dst += sizeof(long);
+		count -= sizeof(long);
+	}
+
+	while (count) {
+		__raw_writeb(*(u8 *)src, dst);
+		src++;
+		dst++;
+		count--;
+	}
+}
+EXPORT_SYMBOL(memcpy_toio);
+#endif
+
+
diff --git a/lib/math/test_div64.c b/lib/math/test_div64.c
index c15edd688dd2b7..3cd699b654d956 100644
--- a/lib/math/test_div64.c
+++ b/lib/math/test_div64.c
@@ -26,6 +26,9 @@ static const u64 test_div64_dividends[] = {
 	0x0072db27380dd689,
 	0x0842f488162e2284,
 	0xf66745411d8ab063,
+	0xfffffffffffffffb,
+	0xfffffffffffffffc,
+	0xffffffffffffffff,
 };
 #define SIZE_DIV64_DIVIDENDS ARRAY_SIZE(test_div64_dividends)
 
@@ -37,7 +40,10 @@ static const u64 test_div64_dividends[] = {
 #define TEST_DIV64_DIVISOR_5 0x0008a880
 #define TEST_DIV64_DIVISOR_6 0x003fd3ae
 #define TEST_DIV64_DIVISOR_7 0x0b658fac
-#define TEST_DIV64_DIVISOR_8 0xdc08b349
+#define TEST_DIV64_DIVISOR_8 0x80000001
+#define TEST_DIV64_DIVISOR_9 0xdc08b349
+#define TEST_DIV64_DIVISOR_A 0xfffffffe
+#define TEST_DIV64_DIVISOR_B 0xffffffff
 
 static const u32 test_div64_divisors[] = {
 	TEST_DIV64_DIVISOR_0,
@@ -49,13 +55,16 @@ static const u32 test_div64_divisors[] = {
 	TEST_DIV64_DIVISOR_6,
 	TEST_DIV64_DIVISOR_7,
 	TEST_DIV64_DIVISOR_8,
+	TEST_DIV64_DIVISOR_9,
+	TEST_DIV64_DIVISOR_A,
+	TEST_DIV64_DIVISOR_B,
 };
 #define SIZE_DIV64_DIVISORS ARRAY_SIZE(test_div64_divisors)
 
 static const struct {
 	u64 quotient;
 	u32 remainder;
-} test_div64_results[SIZE_DIV64_DIVISORS][SIZE_DIV64_DIVIDENDS] = {
+} test_div64_results[SIZE_DIV64_DIVIDENDS][SIZE_DIV64_DIVISORS] = {
 	{
 		{ 0x0000000013045e47, 0x00000001 },
 		{ 0x000000000161596c, 0x00000030 },
@@ -65,6 +74,9 @@ static const struct {
 		{ 0x00000000000013c4, 0x0004ce80 },
 		{ 0x00000000000002ae, 0x001e143c },
 		{ 0x000000000000000f, 0x0033e56c },
+		{ 0x0000000000000001, 0x2b27507f },
+		{ 0x0000000000000000, 0xab275080 },
+		{ 0x0000000000000000, 0xab275080 },
 		{ 0x0000000000000000, 0xab275080 },
 	}, {
 		{ 0x00000001c45c02d1, 0x00000000 },
@@ -75,7 +87,10 @@ static const struct {
 		{ 0x000000000001d637, 0x0004e5d9 },
 		{ 0x0000000000003fc9, 0x000713bb },
 		{ 0x0000000000000165, 0x029abe7d },
+		{ 0x000000000000001f, 0x673c193a },
 		{ 0x0000000000000012, 0x6e9f7e37 },
+		{ 0x000000000000000f, 0xe73c1977 },
+		{ 0x000000000000000f, 0xe73c1968 },
 	}, {
 		{ 0x000000197a3a0cf7, 0x00000002 },
 		{ 0x00000001d9632e5c, 0x00000021 },
@@ -85,7 +100,10 @@ static const struct {
 		{ 0x00000000001a7bb3, 0x00072331 },
 		{ 0x00000000000397ad, 0x0002c61b },
 		{ 0x000000000000141e, 0x06ea2e89 },
+		{ 0x00000000000001ca, 0x4c0a72e7 },
 		{ 0x000000000000010a, 0xab002ad7 },
+		{ 0x00000000000000e5, 0x4c0a767b },
+		{ 0x00000000000000e5, 0x4c0a7596 },
 	}, {
 		{ 0x0000017949e37538, 0x00000001 },
 		{ 0x0000001b62441f37, 0x00000055 },
@@ -95,7 +113,10 @@ static const struct {
 		{ 0x0000000001882ec6, 0x0005cbf9 },
 		{ 0x000000000035333b, 0x0017abdf },
 		{ 0x00000000000129f1, 0x0ab4520d },
+		{ 0x0000000000001a87, 0x18ff0472 },
 		{ 0x0000000000000f6e, 0x8ac0ce9b },
+		{ 0x0000000000000d43, 0x98ff397f },
+		{ 0x0000000000000d43, 0x98ff2c3c },
 	}, {
 		{ 0x000011f321a74e49, 0x00000006 },
 		{ 0x0000014d8481d211, 0x0000005b },
@@ -105,7 +126,10 @@ static const struct {
 		{ 0x0000000012a88828, 0x00036c97 },
 		{ 0x000000000287f16f, 0x002c2a25 },
 		{ 0x00000000000e2cc7, 0x02d581e3 },
+		{ 0x0000000000014318, 0x2ee07d7f },
 		{ 0x000000000000bbf4, 0x1ba08c03 },
+		{ 0x000000000000a18c, 0x2ee303af },
+		{ 0x000000000000a18c, 0x2ee26223 },
 	}, {
 		{ 0x0000d8db8f72935d, 0x00000005 },
 		{ 0x00000fbd5aed7a2e, 0x00000002 },
@@ -115,7 +139,10 @@ static const struct {
 		{ 0x00000000e16b20fa, 0x0002a14a },
 		{ 0x000000001e940d22, 0x00353b2e },
 		{ 0x0000000000ab40ac, 0x06fba6ba },
+		{ 0x00000000000f3f70, 0x0af7eeda },
 		{ 0x000000000008debd, 0x72d98365 },
+		{ 0x0000000000079fb8, 0x0b166dba },
+		{ 0x0000000000079fb8, 0x0b0ece02 },
 	}, {
 		{ 0x000cc3045b8fc281, 0x00000000 },
 		{ 0x0000ed1f48b5c9fc, 0x00000079 },
@@ -125,7 +152,10 @@ static const struct {
 		{ 0x0000000d43fce827, 0x00082b09 },
 		{ 0x00000001ccaba11a, 0x0037e8dd },
 		{ 0x000000000a13f729, 0x0566dffd },
+		{ 0x0000000000e5b64e, 0x3728203b },
 		{ 0x000000000085a14b, 0x23d36726 },
+		{ 0x000000000072db27, 0x38f38cd7 },
+		{ 0x000000000072db27, 0x3880b1b0 },
 	}, {
 		{ 0x00eafeb9c993592b, 0x00000001 },
 		{ 0x00110e5befa9a991, 0x00000048 },
@@ -135,7 +165,10 @@ static const struct {
 		{ 0x000000f4459740fc, 0x00084484 },
 		{ 0x0000002122c47bf9, 0x002ca446 },
 		{ 0x00000000b9936290, 0x004979c4 },
+		{ 0x000000001085e910, 0x05a83974 },
 		{ 0x00000000099ca89d, 0x9db446bf },
+		{ 0x000000000842f488, 0x26b40b94 },
+		{ 0x000000000842f488, 0x1e71170c },
 	}, {
 		{ 0x1b60cece589da1d2, 0x00000001 },
 		{ 0x01fcb42be1453f5b, 0x0000004f },
@@ -145,7 +178,49 @@ static const struct {
 		{ 0x00001c757dfab350, 0x00048863 },
 		{ 0x000003dc4979c652, 0x00224ea7 },
 		{ 0x000000159edc3144, 0x06409ab3 },
+		{ 0x00000001ecce8a7e, 0x30bc25e5 },
 		{ 0x000000011eadfee3, 0xa99c48a8 },
+		{ 0x00000000f6674543, 0x0a593ae9 },
+		{ 0x00000000f6674542, 0x13f1f5a5 },
+	}, {
+		{ 0x1c71c71c71c71c71, 0x00000002 },
+		{ 0x0210842108421084, 0x0000000b },
+		{ 0x007f01fc07f01fc0, 0x000000fb },
+		{ 0x00014245eabf1f9a, 0x0000a63d },
+		{ 0x0000ffffffffffff, 0x0000fffb },
+		{ 0x00001d913cecc509, 0x0007937b },
+		{ 0x00000402c70c678f, 0x0005bfc9 },
+		{ 0x00000016766cb70b, 0x045edf97 },
+		{ 0x00000001fffffffb, 0x80000000 },
+		{ 0x0000000129d84b3a, 0xa2e8fe71 },
+		{ 0x0000000100000001, 0xfffffffd },
+		{ 0x0000000100000000, 0xfffffffb },
+	}, {
+		{ 0x1c71c71c71c71c71, 0x00000003 },
+		{ 0x0210842108421084, 0x0000000c },
+		{ 0x007f01fc07f01fc0, 0x000000fc },
+		{ 0x00014245eabf1f9a, 0x0000a63e },
+		{ 0x0000ffffffffffff, 0x0000fffc },
+		{ 0x00001d913cecc509, 0x0007937c },
+		{ 0x00000402c70c678f, 0x0005bfca },
+		{ 0x00000016766cb70b, 0x045edf98 },
+		{ 0x00000001fffffffc, 0x00000000 },
+		{ 0x0000000129d84b3a, 0xa2e8fe72 },
+		{ 0x0000000100000002, 0x00000000 },
+		{ 0x0000000100000000, 0xfffffffc },
+	}, {
+		{ 0x1c71c71c71c71c71, 0x00000006 },
+		{ 0x0210842108421084, 0x0000000f },
+		{ 0x007f01fc07f01fc0, 0x000000ff },
+		{ 0x00014245eabf1f9a, 0x0000a641 },
+		{ 0x0000ffffffffffff, 0x0000ffff },
+		{ 0x00001d913cecc509, 0x0007937f },
+		{ 0x00000402c70c678f, 0x0005bfcd },
+		{ 0x00000016766cb70b, 0x045edf9b },
+		{ 0x00000001fffffffc, 0x00000003 },
+		{ 0x0000000129d84b3a, 0xa2e8fe75 },
+		{ 0x0000000100000002, 0x00000003 },
+		{ 0x0000000100000001, 0x00000000 },
 	},
 };
 
@@ -208,6 +283,12 @@ static bool __init test_div64(void)
 			return false;
 		if (!test_div64_one(dividend, TEST_DIV64_DIVISOR_8, i, 8))
 			return false;
+		if (!test_div64_one(dividend, TEST_DIV64_DIVISOR_9, i, 9))
+			return false;
+		if (!test_div64_one(dividend, TEST_DIV64_DIVISOR_A, i, 10))
+			return false;
+		if (!test_div64_one(dividend, TEST_DIV64_DIVISOR_B, i, 11))
+			return false;
 		for (j = 0; j < SIZE_DIV64_DIVISORS; j++) {
 			if (!test_div64_one(dividend, test_div64_divisors[j],
 					    i, j))