ALSA: pcm_core: Fix wake_up() optimization

This change fixes the "ALSA: pcm_lib - optimize wake_up() calls for PCM I/O"
commit. New sleeping queue is introduced to separate user space and kernel
space wake_ups. runtime->nowake is renamed to twake (transfer wake).

Signed-off-by: Jaroslav Kysela <perex@perex.cz>

1 files changed, 3 insertions, 2 deletions

diff --git a/include/sound/pcm.h b/include/sound/pcm.h
index e26fb3c58037..3bc9bca771ec 100644
--- a/include/sound/pcm.h
+++ b/include/sound/pcm.h
@@ -311,8 +311,9 @@ struct snd_pcm_runtime {
         struct snd_pcm_mmap_control *control;
 
         /* -- locking / scheduling -- */
-        unsigned int nowake: 1;         /* no wakeup (data-copy in progress) */
-        wait_queue_head_t sleep;
+        unsigned int twake: 1;          /* do transfer (!poll) wakeup */
+        wait_queue_head_t sleep;        /* poll sleep */
+        wait_queue_head_t tsleep;       /* transfer sleep */
         struct fasync_struct *fasync;
 
         /* -- private section -- */