[PATCH v3] bus: arm-cci: remove unnecessary unreachable()
Olof Johansson
olof at lixom.net
Mon May 14 01:23:03 PDT 2018
On Tue, May 08, 2018 at 04:27:26PM +0200, Stefan Agner wrote:
> Mixing asm and C code is not recommended in a naked function by
> gcc and leads to an error when using clang:
> drivers/bus/arm-cci.c:2107:2: error: non-ASM statement in naked
> function is not supported
> unreachable();
> ^
>
> While the function is marked __naked it actually properly return
> in asm. There is no need for the unreachable() call.
>
> GCC 7.2 generates identical object files before and after, other
> than (for obvious reasons) the line numbers generated by
> WANT_WARN_ON_SLOWPATH for all the WARN()s appearing later in the
> file.
>
> Suggested-by: Russell King <linux at arm.linux.org.uk>
> Signed-off-by: Stefan Agner <stefan at agner.ch>
> Acked-by: Nicolas Pitre <nico at linaro.org>
> Reviewed-by: Robin Murphy <robin.murphy at arm.com>
> ---
> Changes in v3:
> - Fix subject and enhance commit message
> Changes in v2:
> - Don't add assembly ASM_UNREACHABLE, just drop unreachable()
Applied to next/drivers for v4.18 merge window now. Thanks!
-Olof
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