linux-kernel - Re: [PATCH] kasan: Add a prototype of task

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Message-ID: <CAG_fn=V6WPeuCb4aZfp7TMDKHeJkOdcMcQySYA7_wW13g_q6+Q@mail.gmail.com>
Date:   Mon, 13 Mar 2017 15:28:18 +0100
From:   Alexander Potapenko <glider@...gle.com>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     Andrey Ryabinin <aryabinin@...tuozzo.com>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        Dmitry Vyukov <dvyukov@...gle.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        kasan-dev <kasan-dev@...glegroups.com>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] kasan: Add a prototype of task_struct to avoid warning

On Mon, Mar 13, 2017 at 3:14 PM, Arnd Bergmann <arnd@...db.de> wrote:
> From: Masami Hiramatsu <mhiramat@...nel.org>
>
> Add a prototype of task_struct to fix below warning on arm64.
>
> In file included from arch/arm64/kernel/probes/kprobes.c:19:0:
> include/linux/kasan.h:81:132: error: 'struct task_struct' declared inside parameter list will not be visible outside of this definition or declaration [-Werror]
>  static inline void kasan_unpoison_task_stack(struct task_struct *task) {}
>
> As same as other types (kmem_cache, page, and vm_struct) this adds a
> prototype of task_struct data structure on top of kasan.h.
>
> [arnd] A related warning was fixed before, but now appears in a different
> line in the same file in v4.11-rc2. The patch from Masami Hiramatsu
> still seems appropriate, so let's take his version.
>
> Link: https://patchwork.kernel.org/patch/9569839/
> Signed-off-by: Masami Hiramatsu <mhiramat@...nel.org>
> Cc: Andrey Ryabinin <aryabinin@...tuozzo.com>
> Cc: Alexander Potapenko <glider@...gle.com>
> Cc: Dmitry Vyukov <dvyukov@...gle.com>
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
Acked-by: Alexander Potapenko <glider@...gle.com>
> ---
>  include/linux/kasan.h | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/include/linux/kasan.h b/include/linux/kasan.h
> index 1c823bef4c15..5734480c9590 100644
> --- a/include/linux/kasan.h
> +++ b/include/linux/kasan.h
> @@ -6,6 +6,7 @@
>  struct kmem_cache;
>  struct page;
>  struct vm_struct;
> +struct task_struct;
>
>  #ifdef CONFIG_KASAN
>
> --
> 2.9.0
>



-- 
Alexander Potapenko
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