[alsa-devel] [PATCH 2/2] sound: Close holes in struct snd_pcm_constraint_list

Lars-Peter Clausen lars at metafoo.de
Mon Apr 27 12:20:29 CEST 2015


On a 64-bit system there is a 32-bit hole in struct snd_pcm_constraint_list
and then 32-bit padding at the end. Reordering things slightly gets rid of
the hole and padding, reducing the size of the struct by 50% from its
original size.

Signed-off-by: Lars-Peter Clausen <lars at metafoo.de>
---
 include/sound/pcm.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/sound/pcm.h b/include/sound/pcm.h
index d632809..691e7ee 100644
--- a/include/sound/pcm.h
+++ b/include/sound/pcm.h
@@ -274,8 +274,8 @@ struct snd_pcm_hw_constraint_ratdens {
 };
 
 struct snd_pcm_hw_constraint_list {
-	unsigned int count;
 	const unsigned int *list;
+	unsigned int count;
 	unsigned int mask;
 };
 
-- 
1.8.0



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