From: Arnd Bergmann <arnd@xxxxxxxx> When generic BUG() support is disabled, this function has no declaration and no callers but causes a W=1 warning: arch/arm64/kernel/traps.c:950:5: error: no previous prototype for 'is_valid_bugaddr' [-Werror=missing-prototypes] Add an #ifdef that matches the one around the declaration. Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx> --- arch/arm64/kernel/traps.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/arch/arm64/kernel/traps.c b/arch/arm64/kernel/traps.c index 98898c3108b8..3f5a21e5968e 100644 --- a/arch/arm64/kernel/traps.c +++ b/arch/arm64/kernel/traps.c @@ -946,7 +946,7 @@ void do_serror(struct pt_regs *regs, unsigned long esr) } /* GENERIC_BUG traps */ - +#ifdef CONFIG_GENERIC_BUG int is_valid_bugaddr(unsigned long addr) { /* @@ -958,6 +958,7 @@ int is_valid_bugaddr(unsigned long addr) */ return 1; } +#endif static int bug_handler(struct pt_regs *regs, unsigned long esr) { -- 2.39.2