From: Kees Cook <keescook@xxxxxxxxxxxx> [ 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 <keescook@xxxxxxxxxxxx> Cc: Daniel Micay <danielmicay@xxxxxxxxx> Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx> Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx> Cc: H. Peter Anvin <hpa@xxxxxxxxx> Link: http://lkml.kernel.org/r/20170506045116.GA2879@beast Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx> Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxxxx> --- 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