[PATCH] [v2] arm64: define BUG() instruction without CONFIG_BUG

Catalin Marinas catalin.marinas at arm.com
Wed Mar 22 07:37:29 PDT 2017

Hi Arnd,

On Tue, Mar 14, 2017 at 10:39:21PM +0100, Arnd Bergmann wrote:
> This mirrors commit e9c38ceba8d9 ("ARM: 8455/1: define __BUG as
> asm(BUG_INSTR) without CONFIG_BUG") to make the behavior of
> arm64 consistent with arm and x86, and avoids lots of warnings in
> randconfig builds, such as:
> kernel/seccomp.c: In function '__seccomp_filter':
> kernel/seccomp.c:666:1: error: no return statement in function returning non-void [-Werror=return-type]
> Signed-off-by: Arnd Bergmann <arnd at arndb.de>

A side-effect of this patch is that it turns WARN into BUG. I hit the
WARN_ONCE in arch/arm64/kernel/efi.c:34 (on Juno with 64K pages) and
with your patch applied, the kernel panics.


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