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SubjectRe: [PATCH v2 9/9] powerpc: Simplify and move arch_randomize_brk()
Hi Christophe,

I love your patch! Perhaps something to improve:

[auto build test WARNING on powerpc/next]
[also build test WARNING on hnaz-mm/master linus/master v5.16-rc2 next-20211126]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url: https://github.com/0day-ci/linux/commits/Christophe-Leroy/Convert-powerpc-to-default-topdown-mmap-layout/20211125-162916
base: https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git next
config: powerpc64-buildonly-randconfig-r006-20211125 (https://download.01.org/0day-ci/archive/20211127/202111270342.b1Y85fuz-lkp@intel.com/config)
compiler: powerpc64-linux-gcc (GCC) 11.2.0
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# https://github.com/0day-ci/linux/commit/554c475dfb73dc352708dff3589b55845b3dd751
git remote add linux-review https://github.com/0day-ci/linux
git fetch --no-tags linux-review Christophe-Leroy/Convert-powerpc-to-default-topdown-mmap-layout/20211125-162916
git checkout 554c475dfb73dc352708dff3589b55845b3dd751
# save the config file to linux build tree
mkdir build_dir
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=powerpc SHELL=/bin/bash arch/powerpc/mm/book3s64/

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

>> arch/powerpc/mm/book3s64/hash_utils.c:2077:15: warning: no previous prototype for 'arch_randomize_brk' [-Wmissing-prototypes]
2077 | unsigned long arch_randomize_brk(struct mm_struct *mm)
| ^~~~~~~~~~~~~~~~~~


vim +/arch_randomize_brk +2077 arch/powerpc/mm/book3s64/hash_utils.c

2076
> 2077 unsigned long arch_randomize_brk(struct mm_struct *mm)

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

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