[PATCH] drm: sun4i: Fix a uninitialized variable warning.
maxime.ripard at bootlin.com
Fri Sep 21 07:26:54 PDT 2018
On Wed, Sep 19, 2018 at 05:01:32PM +0800, zhong jiang wrote:
> 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 at huawei.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.
> I indeed hit the issue. the gcc version is
> gcc (Ubuntu 5.4.0-6ubuntu1~16.04.9) 5.4.0 20160609
I've tested with 4.* gcc, and it didn't report any error. It seems to
be a false positive for this particular version, so there's no need to
merge that patch. If more people are affected, we'll obviously do
something about it though.
Maxime Ripard, Bootlin
Embedded Linux and Kernel engineering
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