ALSA: pcm - Call pgprot_noncached() for vmalloc'ed buffers

pgprot_noncached() can be set for vmalloc'ed buffers safely, and we'd
need non-cached behavior more or less, even for the intermediate ring-
buffers.

Now snd_pcm_lib_mmap_vmalloc() is added as the common PCM mmap callback
that is coupled with snd_pcm_lib_alloc_vmalloc_buffer() & co.

Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 3 insertions, 0 deletions

diff --git a/sound/mips/sgio2audio.c b/sound/mips/sgio2audio.c
index 9b486beeb932..6aff217379d9 100644
--- a/sound/mips/sgio2audio.c
+++ b/sound/mips/sgio2audio.c
@@ -691,6 +691,7 @@ static struct snd_pcm_ops snd_sgio2audio_playback1_ops = {
         .trigger =     snd_sgio2audio_pcm_trigger,
         .pointer =     snd_sgio2audio_pcm_pointer,
         .page =        snd_pcm_lib_get_vmalloc_page,
+        .mmap =        snd_pcm_lib_mmap_vmalloc,
 };
 
 static struct snd_pcm_ops snd_sgio2audio_playback2_ops = {
@@ -703,6 +704,7 @@ static struct snd_pcm_ops snd_sgio2audio_playback2_ops = {
         .trigger =     snd_sgio2audio_pcm_trigger,
         .pointer =     snd_sgio2audio_pcm_pointer,
         .page =        snd_pcm_lib_get_vmalloc_page,
+        .mmap =        snd_pcm_lib_mmap_vmalloc,
 };
 
 static struct snd_pcm_ops snd_sgio2audio_capture_ops = {
@@ -715,6 +717,7 @@ static struct snd_pcm_ops snd_sgio2audio_capture_ops = {
         .trigger =     snd_sgio2audio_pcm_trigger,
         .pointer =     snd_sgio2audio_pcm_pointer,
         .page =        snd_pcm_lib_get_vmalloc_page,
+        .mmap =        snd_pcm_lib_mmap_vmalloc,
 };
 
 /*