Merge pull request dorimanx#50 from ava1ar/master

Linux 3.16 compatibility

exfat_super.c

@@ -1324,10 +1324,17 @@ static int exfat_file_release(struct inode *inode, struct file *filp)
 
 const struct file_operations exfat_file_operations = {
 	.llseek      = generic_file_llseek,
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3,16,0)
 	.read        = do_sync_read,
 	.write       = do_sync_write,
 	.aio_read    = generic_file_aio_read,
 	.aio_write   = generic_file_aio_write,
+#else
+	.read        = new_sync_read,
+	.write       = new_sync_write,
+	.read_iter   = generic_file_read_iter,
+	.write_iter  = generic_file_write_iter,
+#endif
 	.mmap        = generic_file_mmap,
 	.release     = exfat_file_release,
 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,36)
@@ -1566,9 +1573,14 @@ static int exfat_write_end(struct file *file, struct address_space *mapping,
 	return err;
 }
 
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3,16,0)
 static ssize_t exfat_direct_IO(int rw, struct kiocb *iocb,
 					   const struct iovec *iov,
 					   loff_t offset, unsigned long nr_segs)
+#else
+static ssize_t exfat_direct_IO(int rw, struct kiocb *iocb,
+					   struct iov_iter *iter, loff_t offset)
+#endif
 {
 	struct inode *inode = iocb->ki_filp->f_mapping->host;
 #if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,34)
@@ -1577,18 +1589,28 @@ static ssize_t exfat_direct_IO(int rw, struct kiocb *iocb,
 	ssize_t ret;
 
 	if (rw == WRITE) {
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3,16,0)
 		if (EXFAT_I(inode)->mmu_private < (offset + iov_length(iov, nr_segs)))
+#else
+		if (EXFAT_I(inode)->mmu_private < (offset + iov_iter_count(iter)))
+#endif
 			return 0;
 	}
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,1,0)
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,16,0)
+	ret = blockdev_direct_IO(rw, iocb, inode, iter,
+					offset, exfat_get_block);
+#elif LINUX_VERSION_CODE >= KERNEL_VERSION(3,1,0)
 	ret = blockdev_direct_IO(rw, iocb, inode, iov,
 					offset, nr_segs, exfat_get_block);
 #else
         ret = blockdev_direct_IO(rw, iocb, inode, inode->i_sb->s_bdev, iov,
 					offset, nr_segs, exfat_get_block, NULL);
 #endif
 
-#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,34)
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,16,0)
+	if ((ret < 0) && (rw & WRITE))
+		exfat_write_failed(mapping, offset+iov_iter_count(iter));
+#elif LINUX_VERSION_CODE > KERNEL_VERSION(2,6,34)
 	if ((ret < 0) && (rw & WRITE))
 		exfat_write_failed(mapping, offset+iov_length(iov, nr_segs));
 #endif