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| author | Masahiro Yamada <masahiroy@kernel.org> | 2022-12-06 13:07:31 +0900 |
|---|---|---|
| committer | Masahiro Yamada <masahiroy@kernel.org> | 2022-12-11 17:28:32 +0900 |
| commit | 80b6093b55e31c2c40ff082fb32523d4e852954f (patch) | |
| tree | 0065c41f359d87918fac91fe76045466813cf700 /mm/list_lru.c | |
| parent | efa80b028c7a9c74fd875517aa0fc9fd8d610ed0 (diff) | |
| download | linux-80b6093b55e31c2c40ff082fb32523d4e852954f.tar.bz2 | |
kbuild: add -Wundef to KBUILD_CPPFLAGS for W=1 builds
The use of an undefined macro in an #if directive is warned, but only
in *.c files. No warning from other files such as *.S, *.lds.S.
Since -Wundef is a preprocessor-related warning, it should be added to
KBUILD_CPPFLAGS instead of KBUILD_CFLAGS.
My previous attempt [1] uncovered several issues. I could not finish
fixing them all.
This commit adds -Wundef to KBUILD_CPPFLAGS for W=1 builds in order to
block new breakages. (The kbuild test robot tests with W=1)
We can fix the warnings one by one. After fixing all of them, we can
make it default in the top Makefile, and remove -Wundef from
KBUILD_CFLAGS.
[1]: https://lore.kernel.org/all/20221012180118.331005-2-masahiroy@kernel.org/
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Diffstat (limited to 'mm/list_lru.c')
0 files changed, 0 insertions, 0 deletions