diff options
Diffstat (limited to 'sound/core/pcm_native.c')
| -rw-r--r-- | sound/core/pcm_native.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/sound/core/pcm_native.c b/sound/core/pcm_native.c index b465fb6e1f5f0..47027fa4eb282 100644 --- a/sound/core/pcm_native.c +++ b/sound/core/pcm_native.c @@ -3774,6 +3774,26 @@ static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file #endif /* coherent mmap */ /* + * snd_pcm_mmap_data_open - increase the mmap counter + */ +static void snd_pcm_mmap_data_open(struct vm_area_struct *area) +{ + struct snd_pcm_substream *substream = area->vm_private_data; + + atomic_inc(&substream->mmap_count); +} + +/* + * snd_pcm_mmap_data_close - decrease the mmap counter + */ +static void snd_pcm_mmap_data_close(struct vm_area_struct *area) +{ + struct snd_pcm_substream *substream = area->vm_private_data; + + atomic_dec(&substream->mmap_count); +} + +/* * fault callback for mmapping a RAM page */ static vm_fault_t snd_pcm_mmap_data_fault(struct vm_fault *vmf) |