From: Randy Dunlap rdunlap@infradead.org
commit 49832c819ab85b33b7a2a1429c8d067e82be2977 upstream.
When using gcc (SUSE Linux) 7.5.0 (on openSUSE 15.3), I see a build warning:
kernel/trace/trace_osnoise.c: In function 'start_kthread': kernel/trace/trace_osnoise.c:1461:8: warning: 'main' is usually a function [-Wmain] void *main = osnoise_main; ^~~~
Quieten that warning by using "-Wno-main". It's OK to use "main" as a declaration name in the kernel.
Build-tested on most ARCHes.
[ v2: only do it for gcc, since clang doesn't have that particular warning ]
Signed-off-by: Randy Dunlap rdunlap@infradead.org Link: https://lore.kernel.org/lkml/20210813224131.25803-1-rdunlap@infradead.org/ Suggested-by: Steven Rostedt rostedt@goodmis.org Suggested-by: Linus Torvalds torvalds@linux-foundation.org Cc: Daniel Bristot de Oliveira bristot@kernel.org Cc: Masahiro Yamada masahiroy@kernel.org Cc: Michal Marek michal.lkml@markovi.net Cc: linux-kbuild@vger.kernel.org Signed-off-by: Linus Torvalds torvalds@linux-foundation.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- Makefile | 2 ++ 1 file changed, 2 insertions(+)
--- a/Makefile +++ b/Makefile @@ -803,6 +803,8 @@ else # Disabled for clang while comment to attribute conversion happens and # https://github.com/ClangBuiltLinux/linux/issues/636 is discussed. KBUILD_CFLAGS += $(call cc-option,-Wimplicit-fallthrough=5,) +# gcc inanely warns about local variables called 'main' +KBUILD_CFLAGS += -Wno-main endif
# These warnings generated too much noise in a regular build.