From: Kees Cook <[email protected]> [ Upstream commit 60854a12d281e2fa25662fa32ac8022bbff17432 ]
The compressed boot function error() is used to halt execution, but it wasn't marked with "noreturn". This fixes that in preparation for supporting kernel FORTIFY_SOURCE, which uses the noreturn annotation on panic, and calls error(). GCC would warn about a noreturn function calling a non-noreturn function: arch/x86/boot/compressed/misc.c: In function ‘fortify_panic’: arch/x86/boot/compressed/misc.c:416:1: warning: ‘noreturn’ function does return } ^ Signed-off-by: Kees Cook <[email protected]> Cc: Daniel Micay <[email protected]> Cc: Linus Torvalds <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: H. Peter Anvin <[email protected]> Link: http://lkml.kernel.org/r/20170506045116.GA2879@beast Signed-off-by: Ingo Molnar <[email protected]> Signed-off-by: Sasha Levin <[email protected]> --- arch/x86/boot/compressed/error.h | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/arch/x86/boot/compressed/error.h b/arch/x86/boot/compressed/error.h index 2e59dac07f9e..d732e608e3af 100644 --- a/arch/x86/boot/compressed/error.h +++ b/arch/x86/boot/compressed/error.h @@ -1,7 +1,9 @@ #ifndef BOOT_COMPRESSED_ERROR_H #define BOOT_COMPRESSED_ERROR_H +#include <linux/compiler.h> + void warn(char *m); -void error(char *m); +void error(char *m) __noreturn; #endif /* BOOT_COMPRESSED_ERROR_H */ -- 2.14.1
