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 <tiwai@suse.de>

1 files changed, 4 insertions, 3 deletions

diff --git a/sound/core/pcm_native.c b/sound/core/pcm_native.c
index 1c6be91dfb98..b4bf4a4d94a9 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;