linux-kernel - Re: riscv: delay.c:77:17: error: implicit declaration of function 'cpu_relax' [-Werror=implicit-function-declaration]

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Message-ID: <20211029081656.29a66889@canb.auug.org.au>
Date:   Fri, 29 Oct 2021 08:16:56 +1100
From:   Stephen Rothwell <sfr@...b.auug.org.au>
To:     Kefeng Wang <wangkefeng.wang@...wei.com>
Cc:     Naresh Kamboju <naresh.kamboju@...aro.org>,
        linux-riscv <linux-riscv@...ts.infradead.org>,
        open list <linux-kernel@...r.kernel.org>,
        Linux-Next Mailing List <linux-next@...r.kernel.org>,
        <lkft-triage@...ts.linaro.org>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Palmer Dabbelt <palmer@...belt.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: riscv: delay.c:77:17: error: implicit declaration of function
 'cpu_relax' [-Werror=implicit-function-declaration]

Hi all,

[cc'ing Andy and Andrew]

On Thu, 28 Oct 2021 22:57:02 +0800 Kefeng Wang <wangkefeng.wang@...wei.com> wrote:
>
>  From c83a7b83ff96ba77a7c26090ccdd42aa7722788f Mon Sep 17 00:00:00 2001
> From: Kefeng Wang <wangkefeng.wang@...wei.com>
> Date: Thu, 28 Oct 2021 23:03:13 +0800
> Subject: [PATCH] riscv: Fix implicit declaration of function 'cpu_relax'
> 
> Including <asm/processor.h> to fix the implicit declaration of function
> 'cpu_relax'.
> 
> Reported-by: Linux Kernel Functional Testing <lkft@...aro.org>
> Signed-off-by: Kefeng Wang <wangkefeng.wang@...wei.com>
> ---
> After  "include/linux/delay.h: replace kernel.h with the necessary inclusions", we need this include.
> 
>   arch/riscv/lib/delay.c | 2 ++
>   1 file changed, 2 insertions(+)
> 
> diff --git a/arch/riscv/lib/delay.c b/arch/riscv/lib/delay.c
> index f51c9a03bca1..8148dcdee894 100644
> --- a/arch/riscv/lib/delay.c
> +++ b/arch/riscv/lib/delay.c
> @@ -8,6 +8,8 @@
>   #include <linux/timex.h>
>   #include <linux/export.h>
> 
> +#include <asm/processor.h>
> +
>   /*
>    * This is copies from arch/arm/include/asm/delay.h
>    *
> -- 
> 2.26.2

-- 
Cheers,
Stephen Rothwell

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