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Date:   Tue, 10 May 2022 11:40:15 +0100
From:   Will Deacon <will@kernel.org>
To:     Gaosheng Cui <cuigaosheng1@huawei.com>
Cc:     catalin.marinas@arm.com, broonie@kernel.org, pcc@google.com,
        mark.rutland@arm.com, keescook@chromium.org, daniel.kiss@arm.com,
        linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org,
        wangweiyang2@huawei.com, gongruiqi1@huawei.com
Subject: Re: [PATCH -next] arm64: add missing header dependencies
Message-ID: <20220510104014.GA27557@willie-the-truck>
References: <20220509061751.3434059-1-cuigaosheng1@huawei.com>
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On Mon, May 09, 2022 at 02:17:51PM +0800, Gaosheng Cui wrote:
> We get one error when building module with processor.h:
> 
> ./arch/arm64/include/asm/processor.h:263:36: error: implicit declaration of function ‘task_stack_page’;
>   ((struct pt_regs *)(THREAD_SIZE + task_stack_page(p)) - 1)
> ./arch/arm64/include/asm/processor.h:266:42: note: in expansion of macro ‘task_pt_regs’
>  #define KSTK_ESP(tsk) user_stack_pointer(task_pt_regs(tsk))
> 
> task_stack_page is declared in linux/sched/task_stack.h, so this patch
> add the missing header dependencies.
> 
> Signed-off-by: Gaosheng Cui <cuigaosheng1@huawei.com>
> ---
>  arch/arm64/include/asm/processor.h | 1 +
>  1 file changed, 1 insertion(+)

Do you know which commit is causing this error? I haven't seen any other
reports, but it's hard to know which tree should take your patch as it
stands.

Thanks,

Will

> diff --git a/arch/arm64/include/asm/processor.h b/arch/arm64/include/asm/processor.h
> index 73e38d9a540c..1c239841c4d6 100644
> --- a/arch/arm64/include/asm/processor.h
> +++ b/arch/arm64/include/asm/processor.h
> @@ -28,6 +28,7 @@
>  #include <linux/build_bug.h>
>  #include <linux/cache.h>
>  #include <linux/init.h>
> +#include <linux/sched/task_stack.h>
>  #include <linux/stddef.h>
>  #include <linux/string.h>
>  #include <linux/thread_info.h>
> -- 
> 2.25.1
>