commit f3d13b6752e20cdd193d0265cc6b8f1d814dd869
Author: Matthieu CASTET <matthieu.castet@parrot.com>
Date:   Wed Jan 30 15:27:00 2013 +0100

    make snd_pcm_lib_alloc_vmalloc_buffer memory uncached

diff --git a/sound/core/pcm_memory.c b/sound/core/pcm_memory.c
index 69e01c4..1740d39 100644
--- a/sound/core/pcm_memory.c
+++ b/sound/core/pcm_memory.c
@@ -425,7 +425,7 @@ int _snd_pcm_lib_alloc_vmalloc_buffer(struct snd_pcm_substream *substream,
 			return 0; /* already large enough */
 		vfree(runtime->dma_area);
 	}
-	runtime->dma_area = __vmalloc(size, gfp_flags, PAGE_KERNEL);
+	runtime->dma_area = __vmalloc(size, gfp_flags, pgprot_noncached(PAGE_KERNEL));
 	if (!runtime->dma_area)
 		return -ENOMEM;
 	runtime->dma_bytes = size;