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| author | Takashi Iwai <tiwai@suse.de> | 2010-01-18 14:58:57 +0100 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2010-01-18 15:00:34 +0100 |
| commit | c32d977b8157bf67cdf47729ce7dd054a26eb534 (patch) | |
| tree | fedbd1c0d4382e88362abf81f719e6f127e19fa7 /include/sound/pcm.h | |
| parent | 3e879d7bac705be4813a0ec9560cbe31db4b269f (diff) | |
| download | lwn-c32d977b8157bf67cdf47729ce7dd054a26eb534.tar.gz lwn-c32d977b8157bf67cdf47729ce7dd054a26eb534.zip | |
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.h | 4 |
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; |