# git gc
# git rev-parse -q --verify 01fa88c6d412d0d8fb9ca29bc5e224433428c5a4^{commit}
# git fetch -q -n -f git://gitlab.ozlabs.ibm.com/mirror/chleroy-linux.git includes
# git rev-parse -q --verify 01fa88c6d412d0d8fb9ca29bc5e224433428c5a4^{commit}
01fa88c6d412d0d8fb9ca29bc5e224433428c5a4
# git checkout -q -f -B kisskb 01fa88c6d412d0d8fb9ca29bc5e224433428c5a4
# git clean -qxdf
# < git log -1
# commit 01fa88c6d412d0d8fb9ca29bc5e224433428c5a4
# Author: Christophe Leroy <christophe.leroy@csgroup.eu>
# Date:   Sun Jan 23 16:50:07 2022 +0100
# 
#     powerpc: Select ARCH_WANTS_MODULES_DATA_IN_VMALLOC on book3s/32 and 8xx
#     
#     book3s/32 and 8xx have a separate area for allocating modules,
#     defined by MODULES_VADDR / MODULES_END.
#     
#     On book3s/32, it is not possible to protect against execution
#     on a page basis. A full 256M segment is either Exec or NoExec.
#     The module area is in an Exec segment while vmalloc area is
#     in a NoExec segment.
#     
#     In order to protect module data against execution, select
#     ARCH_WANTS_MODULES_DATA_IN_VMALLOC.
#     
#     For the 8xx (and possibly other 32 bits platform in the future),
#     there is no such constraint on Exec/NoExec protection, however
#     there is a critical distance between kernel functions and callers
#     that needs to remain below 32Mbytes in order to avoid costly
#     trampolines. By allocating data outside of module area, we
#     increase the chance for module text to remain within acceptable
#     distance from kernel core text.
#     
#     So select ARCH_WANTS_MODULES_DATA_IN_VMALLOC for 8xx as well.
#     
#     Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
#     Cc: Michael Ellerman <mpe@ellerman.id.au>
#     Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
#     Cc: Paul Mackerras <paulus@samba.org>
# < /opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-gcc --version
# < /opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-ld --version
# < git log --format=%s --max-count=1 01fa88c6d412d0d8fb9ca29bc5e224433428c5a4
# < make -s -j 80 ARCH=powerpc O=/kisskb/build/chleroy_cell_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  cell_defconfig
# < make -s -j 80 ARCH=powerpc O=/kisskb/build/chleroy_cell_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  help
# make -s -j 80 ARCH=powerpc O=/kisskb/build/chleroy_cell_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  olddefconfig
# make -s -j 80 ARCH=powerpc O=/kisskb/build/chleroy_cell_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  
In file included from /kisskb/src/include/linux/bug.h:5:0,
                 from /kisskb/src/arch/powerpc/include/asm/cmpxchg.h:8,
                 from /kisskb/src/arch/powerpc/include/asm/atomic.h:11,
                 from /kisskb/src/include/linux/atomic.h:7,
                 from /kisskb/src/include/linux/mm_types_task.h:13,
                 from /kisskb/src/include/linux/mm_types.h:5,
                 from /kisskb/src/include/linux/buildid.h:5,
                 from /kisskb/src/include/linux/module.h:14,
                 from /kisskb/src/kernel/module/strict_rwx.c:8:
/kisskb/src/kernel/module/strict_rwx.c: In function 'frob_rodata':
/kisskb/src/kernel/module/strict_rwx.c:16:10: error: implicit declaration of function 'PAGE_ALIGNED' [-Werror=implicit-function-declaration]
  BUG_ON(!PAGE_ALIGNED(layout->base));
          ^
/kisskb/src/arch/powerpc/include/asm/bug.h:101:27: note: in definition of macro 'BUG_ON'
  if (__builtin_constant_p(x)) {    \
                           ^
cc1: some warnings being treated as errors
make[3]: *** [/kisskb/src/scripts/Makefile.build:288: kernel/module/strict_rwx.o] Error 1
make[3]: *** Waiting for unfinished jobs....
make[2]: *** [/kisskb/src/scripts/Makefile.build:550: kernel/module] Error 2
make[2]: *** Waiting for unfinished jobs....
make[1]: *** [/kisskb/src/Makefile:1831: kernel] Error 2
make[1]: *** Waiting for unfinished jobs....
make: *** [Makefile:219: __sub-make] Error 2
Command 'make -s -j 80 ARCH=powerpc O=/kisskb/build/chleroy_cell_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  ' returned non-zero exit status 2
# rm -rf /kisskb/build/chleroy_cell_defconfig_powerpc-gcc5
# Build took: 0:07:50.729899