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authorJaroslav Kysela <perex@perex.cz>2010-01-21 10:32:15 +0100
committerJaroslav Kysela <perex@perex.cz>2010-01-21 10:32:15 +0100
commitc91a988dc6551c66418690e36b2a23cdb0255da8 (patch)
treecbb408377b15488d4b45feb2f3d88a616f159814 /sound/core/pcm.c
parentd1db38c015a392b0ea8c15ab95abb3ee768b8d47 (diff)
downloadlinux-linaro-stable-c91a988dc6551c66418690e36b2a23cdb0255da8.tar.gz
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>
Diffstat (limited to 'sound/core/pcm.c')
-rw-r--r--sound/core/pcm.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/sound/core/pcm.c b/sound/core/pcm.c
index df57a0e30bf2..0d428d0896db 100644
--- a/sound/core/pcm.c
+++ b/sound/core/pcm.c
@@ -894,6 +894,7 @@ int snd_pcm_attach_substream(struct snd_pcm *pcm, int stream,
memset((void*)runtime->control, 0, size);
init_waitqueue_head(&runtime->sleep);
+ init_waitqueue_head(&runtime->tsleep);
runtime->status->state = SNDRV_PCM_STATE_OPEN;