From: Jaroslav Kysela <perex@perex.cz>
Date: Sat, 1 Mar 2003 14:24:42 +0000 (+0000)
Subject: Reduced race window
X-Git-Tag: v1.0.3~229
X-Git-Url: https://git.alsa-project.org/?a=commitdiff_plain;h=498699c8aa44f0f6dd3131f8afc4f8f67217cdf2;p=alsa-lib.git

Reduced race window
---

diff --git a/test/code.c b/test/code.c
index 4eab4808..9b4773cb 100644
--- a/test/code.c
+++ b/test/code.c
@@ -149,8 +149,9 @@ void mix_areas2(unsigned int size,
 {
 	while (size-- > 0) {
 		s32 sample = *src;
+		s32 old_sample = *sum;
 		if (cmpxchg(dst, 0, 1) == 0)
-			sample -= *sum;
+			sample -= old_sample;
 		atomic_add(sum, sample);
 		do {
 			sample = *sum;