linux-kernel - Re: [PATCH] drm: include linux/seq

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Date:   Mon, 19 Sep 2016 16:27:41 +0300
From:   Jani Nikula <jani.nikula@...el.com>
To:     Arnd Bergmann <arnd@...db.de>, David Airlie <airlied@...ux.ie>
Cc:     Arnd Bergmann <arnd@...db.de>,
        Daniel Vetter <daniel.vetter@...ll.ch>,
        Dave Airlie <airlied@...il.com>,
        Mika Kahola <mika.kahola@...el.com>,
        Ville Syrjälä <ville.syrjala@...ux.intel.com>,
        Lyude <cpaul@...hat.com>, dri-devel@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] drm: include linux/seq_file.h as needed

On Mon, 19 Sep 2016, Arnd Bergmann <arnd@...db.de> wrote:
> The addition of the debugfs info created references to seq_puts() and
> seq_printf(), but relied on the debugfs header to be included implicitly,
> which apparently doesn't happen all the time, as seen from this randconfig
> build output:
>
> drivers/gpu/drm/drm_dp_helper.c: In function 'drm_dp_downstream_debug':
> drivers/gpu/drm/drm_dp_helper.c:552:2: error: implicit declaration of function 'seq_printf' [-Werror=implicit-function-declaration]
> drivers/gpu/drm/drm_dp_helper.c:560:3: error: implicit declaration of function 'seq_puts' [-Werror=implicit-function-declaration]
>
> Adding the extra include brings back a clean build.

Beat you to it, but no review/acks...

http://patchwork.freedesktop.org/patch/msgid/1474020396-14875-1-git-send-email-jani.nikula@intel.com

BR,
Jani.


>
> Fixes: 80209e5f2c42 ("drm: Add DP branch device info on debugfs")
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
> ---
>  drivers/gpu/drm/drm_dp_helper.c | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/drivers/gpu/drm/drm_dp_helper.c b/drivers/gpu/drm/drm_dp_helper.c
> index a07adf0a07db..3e6fe82c6d64 100644
> --- a/drivers/gpu/drm/drm_dp_helper.c
> +++ b/drivers/gpu/drm/drm_dp_helper.c
> @@ -27,6 +27,7 @@
>  #include <linux/errno.h>
>  #include <linux/sched.h>
>  #include <linux/i2c.h>
> +#include <linux/seq_file.h>
>  #include <drm/drm_dp_helper.h>
>  #include <drm/drmP.h>

-- 
Jani Nikula, Intel Open Source Technology Center