The volatile prefix is just useless there.  Let's kill them, and then
gcc will be happier, too.
   sound/acore/pcm.c:867: warning: passing argument 1 of â€˜__constant_c_and_count_memset’ discards qualifiers from pointer target type
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>
        union snd_pcm_sync_id sync;     /* hardware synchronization ID */
 
        /* -- mmap -- */
-       volatile struct snd_pcm_mmap_status *status;
-       volatile struct snd_pcm_mmap_control *control;
+       struct snd_pcm_mmap_status *status;
+       struct snd_pcm_mmap_control *control;
 
        /* -- locking / scheduling -- */
        wait_queue_head_t sleep;