From: Arnd Bergmann arnd@arndb.de Subject: kbuild: fix kernel/bounds.c 'W=1' warning
Building any configuration with 'make W=1' produces a warning:
kernel/bounds.c:16:6: warning: no previous prototype for 'foo' [-Wmissing-prototypes]
When also passing -Werror, this prevents us from building any other files. Nobody ever calls the function, but we can't make it 'static' either since we want the compiler output.
Calling it 'main' instead however avoids the warning, because gcc does not insist on having a declaration for main.
Link: http://lkml.kernel.org/r/20181005083313.2088252-1-arnd@arndb.de Signed-off-by: Arnd Bergmann arnd@arndb.de Reported-by: Kieran Bingham kieran.bingham+renesas@ideasonboard.com Reviewed-by: Kieran Bingham kieran.bingham+renesas@ideasonboard.com Cc: David Laight David.Laight@ACULAB.COM Cc: Masahiro Yamada yamada.masahiro@socionext.com Cc: Greg Kroah-Hartman gregkh@linuxfoundation.org Cc: stable@vger.kernel.org Signed-off-by: Andrew Morton akpm@linux-foundation.org ---
kernel/bounds.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
--- a/kernel/bounds.c~kbuild-fix-kernel-boundsc-w=1-warning +++ a/kernel/bounds.c @@ -13,7 +13,7 @@ #include <linux/log2.h> #include <linux/spinlock_types.h>
-void foo(void) +int main(void) { /* The enum constants to put into include/generated/bounds.h */ DEFINE(NR_PAGEFLAGS, __NR_PAGEFLAGS); @@ -23,4 +23,6 @@ void foo(void) #endif DEFINE(SPINLOCK_SIZE, sizeof(spinlock_t)); /* End of constants */ + + return 0; } _