[Nouveau] [PATCH xf86-video-nouveau] xv: fix build warning regarding const qualifier

[Ilia Mirkin]

On Sat, Jan 19, 2019 at 6:38 PM Rhys Kidd <rhyskidd at gmail.com> wrote:
>
> On Sat, 19 Jan 2019 at 18:32, Ilia Mirkin <imirkin at alum.mit.edu> wrote:
>>
>> Is vlCreateAdaptorXvMC just silly, or does it really want to take
>> ownership of the name pointer?
>
>
> vlCreateAdaptorXvMC( ) doesn't need to take over ownership of the name pointer, so yes - I guess it's being silly in one respect by not being specific about const.

OK. I'm not a fan of these types of casts, but it's also pretty minor.
However I'd appreciate the subject getting renamed to "silence" rather
than "fix", since it's not fixing anything (in fact it's arguably
introducing a bug).

Reviewed-by: Ilia Mirkin <imirkin at alum.mit.edu>

>
>>
>>
>> On Sat, Jan 19, 2019 at 6:30 PM Rhys Kidd <rhyskidd at gmail.com> wrote:
>> >
>> > Fixes warning with gcc 8.2:
>> >
>> > nouveau_xv.c: In function ‘NVInitVideo’:
>> > nouveau_xv.c:2247:68: warning: passing argument 2 of ‘vlCreateAdaptorXvMC’ discards ‘const’ qualifier from pointer target type [-Wdiscarded-qualifiers]
>> >     adaptorsXvMC[0] = vlCreateAdaptorXvMC(pScreen, textureAdaptor[0]->name);
>> >                                                    ~~~~~~~~~~~~~~~~~^~~~~~
>> > In file included from nouveau_xv.c:42:
>> > vl_hwmc.h:6:63: note: expected ‘char *’ but argument is of type ‘const char *’
>> >  XF86MCAdaptorPtr vlCreateAdaptorXvMC(ScreenPtr pScreen, char *xv_adaptor_name);
>> >                                                          ~~~~~~^~~~~~~~~~~~~~~
>> >
>> > Signed-off-by: Rhys Kidd <rhyskidd at gmail.com>
>> > ---
>> >  src/nouveau_xv.c | 2 +-
>> >  1 file changed, 1 insertion(+), 1 deletion(-)
>> >
>> > diff --git a/src/nouveau_xv.c b/src/nouveau_xv.c
>> > index a7ec21a..3258ef7 100644
>> > --- a/src/nouveau_xv.c
>> > +++ b/src/nouveau_xv.c
>> > @@ -2244,7 +2244,7 @@ NVInitVideo(ScreenPtr pScreen)
>> >                 XF86MCAdaptorPtr *adaptorsXvMC = malloc(sizeof(XF86MCAdaptorPtr));
>> >
>> >                 if (adaptorsXvMC) {
>> > -                       adaptorsXvMC[0] = vlCreateAdaptorXvMC(pScreen, textureAdaptor[0]->name);
>> > +                       adaptorsXvMC[0] = vlCreateAdaptorXvMC(pScreen, (char *)textureAdaptor[0]->name);
>> >
>> >                         if (adaptorsXvMC[0]) {
>> >                                 vlInitXvMC(pScreen, 1, adaptorsXvMC);
>> > --
>> > 2.19.1
>> >
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