snd_ac97_swap_ctl 2682 sound/pci/ac97/ac97_codec.c if (snd_ac97_swap_ctl(ac97, "Master Playback", "Surround Playback", "Switch") || snd_ac97_swap_ctl 2683 sound/pci/ac97/ac97_codec.c snd_ac97_swap_ctl(ac97, "Master Playback", "Surround Playback", "Volume")) snd_ac97_swap_ctl 82 sound/pci/ac97/ac97_patch.h static int snd_ac97_swap_ctl(struct snd_ac97 *ac97, const char *s1,