5.15-stable review patch. If anyone has any objections, please let me know.
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From: Peter Zijlstra peterz@infradead.org
[ Upstream commit 9818af18db4bfefd320d0fef41390a616365e6f7 ]
Per Nathan, clang catches unused "static inline" functions in C files since commit 6863f5643dd7 ("kbuild: allow Clang to find unused static inline functions for W=1 build").
Linus said:
So I entirely ignore W=1 issues, because I think so many of the extra warnings are bogus.
But if this one in particular is causing more problems than most - some teams do seem to use W=1 as part of their test builds - it's fine to send me a patch that just moves bad warnings to W=2.
And if anybody uses W=2 for their test builds, that's THEIR problem..
Here is the change to bump the warning from W=1 to W=2.
Fixes: 6863f5643dd7 ("kbuild: allow Clang to find unused static inline functions for W=1 build") Signed-off-by: Peter Zijlstra peterz@infradead.org Signed-off-by: Andy Shevchenko andriy.shevchenko@linux.intel.com Link: https://patch.msgid.link/20251106105000.2103276-1-andriy.shevchenko@linux.in... [nathan: Adjust comment as well] Signed-off-by: Nathan Chancellor nathan@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- include/linux/compiler_types.h | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/include/linux/compiler_types.h b/include/linux/compiler_types.h index 4f2203c4a2574..ca9345e2934d3 100644 --- a/include/linux/compiler_types.h +++ b/include/linux/compiler_types.h @@ -163,10 +163,9 @@ struct ftrace_likely_data { /* * GCC does not warn about unused static inline functions for -Wunused-function. * Suppress the warning in clang as well by using __maybe_unused, but enable it - * for W=1 build. This will allow clang to find unused functions. Remove the - * __inline_maybe_unused entirely after fixing most of -Wunused-function warnings. + * for W=2 build. This will allow clang to find unused functions. */ -#ifdef KBUILD_EXTRA_WARN1 +#ifdef KBUILD_EXTRA_WARN2 #define __inline_maybe_unused #else #define __inline_maybe_unused __maybe_unused