[alsa-devel] [PATCH] ALSA: hda - Silence PM ops build warning

[Lukas Wunner]

On Thu, Mar 29, 2018 at 01:51:43PM +0200, Takashi Iwai wrote:
> On Thu, 29 Mar 2018 13:46:26 +0200, Lukas Wunner wrote:
> > The system sleep PM ops azx_suspend() and azx_resume() were previously
> > called by vga_switcheroo, but commit 07f4f97d7b4b ("vga_switcheroo: Use
> > device link for HDA controller") removed their invocation.
> > 
> > Unfortunately the commit neglected to update the #ifdef surrounding the
> > two functions, so if CONFIG_PM_SLEEP is *not* enabled but all three of
> > CONFIG_PM, CONFIG_VGA_SWITCHEROO and CONFIG_SND_HDA_CODEC_HDMI *are*
> > enabled, the compiler now emits the following warning:
> > 
> > sound/pci/hda/hda_intel.c:1024:12: warning: 'azx_resume' defined but not used [-Wunused-function]
> >  static int azx_resume(struct device *dev)
> >             ^~~~~~~~~~
> > sound/pci/hda/hda_intel.c:989:12: warning: 'azx_suspend' defined but not used [-Wunused-function]
> >  static int azx_suspend(struct device *dev)
> >             ^~~~~~~~~~~
> > 
> > Silence by updating the #ifdef.  Because the #ifdef block now uses the
> > same condition as the one immediately succeeding it, the two blocks can
> > be collapsed together, shaving off another two lines.
> > 
> > Fixes: 07f4f97d7b4b ("vga_switcheroo: Use device link for HDA controller")
> > Cc: Takashi Iwai <tiwai at suse.com>
> > Reported-by: Arnd Bergmann <arnd at arndb.de>
> > Signed-off-by: Lukas Wunner <lukas at wunner.de>
> 
> Reviewed-by: Takashi Iwai <tiwai at suse.de>
> 
> Can this go through drm(-misc) tree as the original commit stays?

Pushed to drm-misc-next-fixes, thanks for the report and review.

Sorry, you were super fast with the review, but I wanted to give folks
the chance to comment at least for a few hours before pushing, despite
this likely being an uncontroversial patch.

It was also automatically applied to the drm-misc/for-linux-next branch,
so the build warning should be gone in linux-next once it's rebuilt.
(I'm not sure if Good Friday and Easter Monday are national holidays
down under, as they are in Germany, but I hope Stephen will rebuild
Tuesday at the latest.)

Peaceful Easter holidays to everyone,

Lukas