linux-kernel - Re: [PATCH] drm: sun4i: Fix a uninitialized variable warning.

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Message-ID: <5BA2106C.2080007@huawei.com>
Date:   Wed, 19 Sep 2018 17:01:32 +0800
From:   zhong jiang <zhongjiang@...wei.com>
To:     Maxime Ripard <maxime.ripard@...tlin.com>
CC:     <airlied@...ux.ie>, <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] drm: sun4i: Fix a uninitialized variable warning.

On 2018/9/19 16:47, Maxime Ripard wrote:
> On Tue, Sep 18, 2018 at 03:25:20PM +0800, zhong jiang wrote:
>> Fix the following compile warning:
>>
>> drivers/gpu/drm/sun4i/sun4i_tcon.c:1088: warning: 'has_lvds_alt' may be used uninitialized in this function [-Wmaybe-uninitialized]
>> bool has_lvds_rst, has_lvds_alt, can_lvds;
>>
>> Signed-off-by: zhong jiang <zhongjiang@...wei.com>
> I can't see any code path that would lead to an uninitialized usage of
> that variable.
>
> Which compiler produced that warning? I tried building it today with
> gcc 8.1.1, and I don't see that warning either.
>
> Maxime
>
I indeed  hit the issue.  the gcc version is
gcc (Ubuntu 5.4.0-6ubuntu1~16.04.9) 5.4.0 20160609

Thanks,
zhong jiang