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authorTakashi Iwai <tiwai@suse.de>2010-01-18 16:58:57 +0300
committerTakashi Iwai <tiwai@suse.de>2010-01-18 17:00:34 +0300
commitc32d977b8157bf67cdf47729ce7dd054a26eb534 (patch)
treefedbd1c0d4382e88362abf81f719e6f127e19fa7 /include/sound/pcm.h
parent3e879d7bac705be4813a0ec9560cbe31db4b269f (diff)
downloadlinux-c32d977b8157bf67cdf47729ce7dd054a26eb534.tar.xz
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>
Diffstat (limited to 'include/sound/pcm.h')
-rw-r--r--include/sound/pcm.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/include/sound/pcm.h b/include/sound/pcm.h
index 1d4ca2aae50d..aabf48bb8ee6 100644
--- a/include/sound/pcm.h
+++ b/include/sound/pcm.h
@@ -1021,6 +1021,10 @@ int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream, struct vm_area_s
#define snd_pcm_lib_mmap_iomem NULL
#endif
+int snd_pcm_lib_mmap_noncached(struct snd_pcm_substream *substream,
+ struct vm_area_struct *area);
+#define snd_pcm_lib_mmap_vmalloc snd_pcm_lib_mmap_noncached
+
static inline void snd_pcm_limit_isa_dma_size(int dma, size_t *max)
{
*max = dma < 4 ? 64 * 1024 : 128 * 1024;