-----Original Message----- Hi Kazu, On Mon, Nov 9, 2020 at 11:42 AM HAGIO KAZUHITO(萩尾　一仁) <k-hagio-ab(a)nec.com&gt; wrote: > > With Linux 5.4 and later kernels that contain commit > 7e35b42591c058b91282f95ce3b2cf0c05ffe93d ("kbuild: remove SUBDIRS > support"), "make" command in the memory_driver directory doesn't > build crash memory driver module as expected. Add "M=" to fix. > > Signed-off-by: Kazuhito Hagio <k-hagio-ab(a)nec.com&gt; > --- > memory_driver/Makefile | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/memory_driver/Makefile b/memory_driver/Makefile > index e84afe98ff24..b494aa3cd184 100644 > --- a/memory_driver/Makefile > +++ b/memory_driver/Makefile > @@ -10,6 +10,6 @@ > # > obj-m := crash.o > all: > - make -C /lib/modules/`uname -r`/build SUBDIRS=${PWD} modules > + make -C /lib/modules/`uname -r`/build M=${PWD} SUBDIRS=${PWD} modules > clean: > rm -f *.mod.c *.ko *.o Module.* LGTM, so: Acked-by: Bhupesh Sharma <bhsharma(a)redhat.com&gt; Thanks.