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/[email protected]
Signed-off-by: Arnd Bergmann <[email protected]>
Reported-by: Kieran Bingham <[email protected]>
Reviewed-by: Kieran Bingham <[email protected]>
Cc: David Laight <[email protected]>
Cc: Masahiro Yamada <[email protected]>
Cc: Greg Kroah-Hartman <[email protected]>
Cc: <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

diff --git a/kernel/bounds.c b/kernel/bounds.c
index c373e887c0664b7206004ea806b1f2a8a00b8b87..9795d75b09b2323306ad6a058a6350a87a251443 100644 (file)
--- a/kernel/bounds.c
+++ b/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;
 }