[dm-devel] [PATCH 05/19] multipathd: use volatile qualifier for running_state
mwilck at suse.com
mwilck at suse.com
Wed Sep 16 15:37:04 UTC 2020
From: Martin Wilck <mwilck at suse.com>
While we access running_state only under the config_lock,
we sometimes do in a loop. Use the volatile qualifier to make
sure compilers can't optimize away the loads.
Signed-off-by: Martin Wilck <mwilck at suse.com>
---
multipathd/main.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/multipathd/main.c b/multipathd/main.c
index 8cc9b74..451d68c 100644
--- a/multipathd/main.c
+++ b/multipathd/main.c
@@ -126,7 +126,7 @@ int poll_dmevents = 0;
int poll_dmevents = 1;
#endif
/* Don't access this variable without holding config_lock */
-enum daemon_status running_state = DAEMON_INIT;
+volatile enum daemon_status running_state = DAEMON_INIT;
pid_t daemon_pid;
pthread_mutex_t config_lock = PTHREAD_MUTEX_INITIALIZER;
pthread_cond_t config_cond;
--
2.28.0
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