[55/96] kbuild: fix kernel/bounds.c 'W=1' warning

Message ID 20181030220732.UPsUOoECA%akpm@linux-foundation.org
State New
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  • Untitled series #15888
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Commit Message

Andrew Morton Oct. 30, 2018, 10:07 p.m.
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 */
@@ -23,4 +23,6 @@  void foo(void)
 	DEFINE(SPINLOCK_SIZE, sizeof(spinlock_t));
 	/* End of constants */
+	return 0;