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Date:   Fri, 29 Oct 2021 08:16:56 +1100
From:   Stephen Rothwell <sfr@canb.auug.org.au>
To:     Kefeng Wang <wangkefeng.wang@huawei.com>
Cc:     Naresh Kamboju <naresh.kamboju@linaro.org>,
        linux-riscv <linux-riscv@lists.infradead.org>,
        open list <linux-kernel@vger.kernel.org>,
        Linux-Next Mailing List <linux-next@vger.kernel.org>,
        <lkft-triage@lists.linaro.org>,
        Paul Walmsley <paul.walmsley@sifive.com>,
        Albert Ou <aou@eecs.berkeley.edu>,
        Palmer Dabbelt <palmer@dabbelt.com>,
        Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
        Andrew Morton <akpm@linux-foundation.org>
Subject: Re: riscv: delay.c:77:17: error: implicit declaration of function
 'cpu_relax' [-Werror=implicit-function-declaration]
Message-ID: <20211029081656.29a66889@canb.auug.org.au>
In-Reply-To: <3555118a-914f-8c21-d5c9-7f3d969d357e@huawei.com>
References: <CA+G9fYs6X5ce1BhynpivZLU7MvPq+vkrJCM7oSJf8GJBApCqZg@mail.gmail.com>
        <3555118a-914f-8c21-d5c9-7f3d969d357e@huawei.com>
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Hi all,

[cc'ing Andy and Andrew]

On Thu, 28 Oct 2021 22:57:02 +0800 Kefeng Wang <wangkefeng.wang@huawei.com>=
 wrote:
>
>  From c83a7b83ff96ba77a7c26090ccdd42aa7722788f Mon Sep 17 00:00:00 2001
> From: Kefeng Wang <wangkefeng.wang@huawei.com>
> Date: Thu, 28 Oct 2021 23:03:13 +0800
> Subject: [PATCH] riscv: Fix implicit declaration of function 'cpu_relax'
>=20
> Including <asm/processor.h> to fix the implicit declaration of function
> 'cpu_relax'.
>=20
> Reported-by: Linux Kernel Functional Testing <lkft@linaro.org>
> Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
> ---
> After  "include/linux/delay.h: replace kernel.h with the necessary inclus=
ions", we need this include.
>=20
>   arch/riscv/lib/delay.c | 2 ++
>   1 file changed, 2 insertions(+)
>=20
> 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>
>=20
> +#include <asm/processor.h>
> +
>   /*
>    * This is copies from arch/arm/include/asm/delay.h
>    *
> --=20
> 2.26.2

--=20
Cheers,
Stephen Rothwell

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