[PATCH 0/6] [v3] kbuild: enable more warnings by default

[Arnd Bergmann]

From: Arnd Bergmann <arnd@xxxxxxxx>

Hi Andrew,

All the warning fixes I sent for these warnings have been merged into
mainline or linux-next, so let's turn them on by default.

Since some of the bugfixes are still in flight in maintainer trees,
I have rebased this on top of the mm/mm-nonmm-unstable branch
for the purpose of merging these during the second half of the
6.10 merge window.

I did thorough testing of the changes on x86, arm64 and arm, as
well as allmodconfig testing across all architectures and compilers.
It is still likely that this will catch more warnings that show
up in configurations I did not test, or in newly merged code,
and I plan to send fixes for those as well.

I also sent patches to enable -Wunused-const-variable and
-Wtautological-constant-out-of-range-compare, but those still
need additional bugfixes to get merged first.

Arnd Bergmann (6):
  [v3] kbuild: turn on -Wextra by default
  [v3] kbuild: remove redundant extra warning flags
  [v3] kbuild: turn on -Wrestrict by default
  [v3] kbuild: enable -Wformat-truncation on clang
  [v3] kbuild: enable -Wcast-function-type-strict unconditionally
  [v3] kbuild: enable -Wstringop-truncation globally

 scripts/Makefile.extrawarn | 30 +++++++++++-------------------
 1 file changed, 11 insertions(+), 19 deletions(-)

-- 
2.39.2

Cc: Masahiro Yamada <masahiroy@xxxxxxxxxx>
Cc: Nathan Chancellor <nathan@xxxxxxxxxx>
Cc: Nicolas Schier <nicolas@xxxxxxxxx>
Cc: Kees Cook <keescook@xxxxxxxxxxxx>
Cc: linux-kbuild@xxxxxxxxxxxxxxx
Cc: linux-kernel@xxxxxxxxxxxxxxx