Merge branch 'topic/pcm-nonatomic' into for-next

This is a merge for exending PCM ops to be non-atomic.

1 files changed, 14 insertions, 37 deletions

diff --git a/include/sound/pcm.h b/include/sound/pcm.h
index 6f3e10ca0e32..67e0bdb9f0fa 100644
--- a/include/sound/pcm.h
+++ b/include/sound/pcm.h
@@ -365,6 +365,7 @@ struct snd_pcm_runtime {
 
 struct snd_pcm_group {		/* keep linked substreams */
 	spinlock_t lock;
+	struct mutex mutex;
 	struct list_head substreams;
 	int count;
 };
@@ -460,6 +461,7 @@ struct snd_pcm {
 	void (*private_free) (struct snd_pcm *pcm);
 	struct device *dev; /* actual hw device this belongs to */
 	bool internal; /* pcm is for internal use only */
+	bool nonatomic; /* whole PCM operations are in non-atomic context */
 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
 	struct snd_pcm_oss oss;
 #endif
@@ -492,8 +494,6 @@ int snd_pcm_notify(struct snd_pcm_notify *notify, int nfree);
  *  Native I/O
  */
 
-extern rwlock_t snd_pcm_link_rwlock;
-
 int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info);
 int snd_pcm_info_user(struct snd_pcm_substream *substream,
 		      struct snd_pcm_info __user *info);
@@ -537,41 +537,18 @@ static inline int snd_pcm_stream_linked(struct snd_pcm_substream *substream)
 	return substream->group != &substream->self_group;
 }
 
-static inline void snd_pcm_stream_lock(struct snd_pcm_substream *substream)
-{
-	read_lock(&snd_pcm_link_rwlock);
-	spin_lock(&substream->self_group.lock);
-}
-
-static inline void snd_pcm_stream_unlock(struct snd_pcm_substream *substream)
-{
-	spin_unlock(&substream->self_group.lock);
-	read_unlock(&snd_pcm_link_rwlock);
-}
-
-static inline void snd_pcm_stream_lock_irq(struct snd_pcm_substream *substream)
-{
-	read_lock_irq(&snd_pcm_link_rwlock);
-	spin_lock(&substream->self_group.lock);
-}
-
-static inline void snd_pcm_stream_unlock_irq(struct snd_pcm_substream *substream)
-{
-	spin_unlock(&substream->self_group.lock);
-	read_unlock_irq(&snd_pcm_link_rwlock);
-}
-
-#define snd_pcm_stream_lock_irqsave(substream, flags) \
-do { \
-	read_lock_irqsave(&snd_pcm_link_rwlock, (flags)); \
-	spin_lock(&substream->self_group.lock); \
-} while (0)
-
-#define snd_pcm_stream_unlock_irqrestore(substream, flags) \
-do { \
-	spin_unlock(&substream->self_group.lock); \
-	read_unlock_irqrestore(&snd_pcm_link_rwlock, (flags)); \
-} while (0)
+void snd_pcm_stream_lock(struct snd_pcm_substream *substream);
+void snd_pcm_stream_unlock(struct snd_pcm_substream *substream);
+void snd_pcm_stream_lock_irq(struct snd_pcm_substream *substream);
+void snd_pcm_stream_unlock_irq(struct snd_pcm_substream *substream);
+unsigned long _snd_pcm_stream_lock_irqsave(struct snd_pcm_substream *substream);
+#define snd_pcm_stream_lock_irqsave(substream, flags)		 \
+	do {							 \
+		typecheck(unsigned long, flags);		 \
+		flags = _snd_pcm_stream_lock_irqsave(substream); \
+	} while (0)
+void snd_pcm_stream_unlock_irqrestore(struct snd_pcm_substream *substream,
+				      unsigned long flags);
 
 #define snd_pcm_group_for_each_entry(s, substream) \
 	list_for_each_entry(s, &substream->group->substreams, link_list)