Possible Bug in Makefiles LKM examples

[RoSchmi]

Hi Derek,
I'm working through your LKM examples and I think that a bug might have found its way into the Makefiles of the project.
I'm using debian version 4.4.91-ti-r133.
As an example:
:~/exploringBB/extras/kernel/hello$
For me, with your Makefile

---

obj-m+=hello.o
all:
make -C /lib/modules/$(shell uname -r)/build/ M=$(PWD) modules
# make -C /usr/src/linux-headers-$(shell uname -r) M=$(PWD) modules
clean:
make -C /lib/modules/$(shell uname -r)/build/ M=$(PWD) clean

---

does not work. It results in: *** No rule to make target 'modules'. Stop
I think the first line in all: must be as I pointed out in the outcommented line below your code
Also "make clean" results in: *** No rule to make target 'clean'. Stop.

Excuse me if your code is right and I did something wrong as I'm a beginner with linux, C and beaglebone.

By the way: Thank you very much for your excellent work.
Is there a new edition of your book, using newer kernels, in work?
Kind regards
Roland