From 18a2b9623370479d1646b9b94e3528683f3b74de Mon Sep 17 00:00:00 2001 From: Takashi Iwai Date: Wed, 28 Sep 2011 17:12:59 +0200 Subject: [PATCH] ALSA: pcm - Export snd_pcm_lib_default_mmap() helper Export the default mmap function, snd_pcm_lib_default_mmap(). The upcoming non-snooping support in HD-audio driver will use this to override the mmap method. Signed-off-by: Takashi Iwai --- include/sound/pcm.h | 2 ++ sound/core/pcm_native.c | 7 ++++--- 2 files changed, 6 insertions(+), 3 deletions(-) diff --git a/include/sound/pcm.h b/include/sound/pcm.h index 57e71fa..249d988 100644 --- a/include/sound/pcm.h +++ b/include/sound/pcm.h @@ -1035,6 +1035,8 @@ static inline void snd_pcm_mmap_data_close(struct vm_area_struct *area) atomic_dec(&substream->mmap_count); } +int snd_pcm_lib_default_mmap(struct snd_pcm_substream *substream, + struct vm_area_struct *area); /* mmap for io-memory area */ #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA) #define SNDRV_PCM_INFO_MMAP_IOMEM SNDRV_PCM_INFO_MMAP diff --git a/sound/core/pcm_native.c b/sound/core/pcm_native.c index 1c6be91..b4bf4a4 100644 --- a/sound/core/pcm_native.c +++ b/sound/core/pcm_native.c @@ -3156,8 +3156,8 @@ static const struct vm_operations_struct snd_pcm_vm_ops_data_fault = { /* * mmap the DMA buffer on RAM */ -static int snd_pcm_default_mmap(struct snd_pcm_substream *substream, - struct vm_area_struct *area) +int snd_pcm_lib_default_mmap(struct snd_pcm_substream *substream, + struct vm_area_struct *area) { area->vm_flags |= VM_RESERVED; #ifdef ARCH_HAS_DMA_MMAP_COHERENT @@ -3177,6 +3177,7 @@ static int snd_pcm_default_mmap(struct snd_pcm_substream *substream, area->vm_ops = &snd_pcm_vm_ops_data_fault; return 0; } +EXPORT_SYMBOL_GPL(snd_pcm_lib_default_mmap); /* * mmap the DMA buffer on I/O memory area @@ -3242,7 +3243,7 @@ int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file, if (substream->ops->mmap) err = substream->ops->mmap(substream, area); else - err = snd_pcm_default_mmap(substream, area); + err = snd_pcm_lib_default_mmap(substream, area); if (!err) atomic_inc(&substream->mmap_count); return err; -- 2.7.4