Le 24/11/2021 à 13:10, Christophe Leroy a écrit :
Le 22/11/2021 à 15:48, kernel test robot a écrit :
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-20211118]
[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/20211122-165115
base:
https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git next
config: powerpc64-randconfig-s031-20211122 (attached as .config)
compiler: powerpc64-linux-gcc (GCC) 11.2.0
reproduce:
wget
https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross
-O ~/bin/make.cross
chmod +x ~/bin/make.cross
# apt-get install sparse
# sparse version: v0.6.4-dirty
#
https://github.com/0day-ci/linux/commit/1d0b7cc86d08f25f595b52d8c39ba9ca1d29a30a
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/20211122-165115
git checkout 1d0b7cc86d08f25f595b52d8c39ba9ca1d29a30a
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0
make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=powerpc64
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@xxxxxxxxx>
All warnings (new ones prefixed by >>):
arch/powerpc/mm/book3s64/slice.c: In function
'slice_get_unmapped_area':
arch/powerpc/mm/book3s64/slice.c:639:1: warning: the frame size of
1040 bytes is larger than 1024 bytes [-Wframe-larger-than=]
639 | }
| ^
The problem was already existing when slice.c was in arch/powerpc/mm/
This patch doesn't introduce the problem.
In fact the problem is really added by yourself mister 'kernel test robot'.
CONFIG_FRAME_WARN is supposed to be 2048 on 64 bit architectures.
It the robot starts to reduce that value, it is on its own ....
config FRAME_WARN
int "Warn for stack frames larger than"
range 0 8192
default 2048 if GCC_PLUGIN_LATENT_ENTROPY
default 1536 if (!64BIT && (PARISC || XTENSA))
default 1024 if (!64BIT && !PARISC)
default 2048 if 64BIT
help
Tell gcc to warn at build time for stack frames larger than this.
Setting this too low will cause a lot of warnings.
Setting it to 0 disables the warning.
