ratelimit: fix the return value when __ratelimit() fails to acquire the lock

The log of commit edaac8e3167501cda336231d00611bf59c164346 ("ratelimit:
Fix/allow use in atomic contexts"), indicates that we want to suppress the
callback when the trylock fails.

Signed-off-by: Yong Zhang <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Christian Borntraeger <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

diff --git a/lib/ratelimit.c b/lib/ratelimit.c
index b4cd24ff9b29713d27171189b913422c243355e3..027a03f4c56d4059b23560c984f5699e44e069d8 100644 (file)
--- a/lib/ratelimit.c
+++ b/lib/ratelimit.c
@@ -40,7 +40,7 @@ int ___ratelimit(struct ratelimit_state *rs, const char *func)
         * the entity that is holding the lock already:
         */
        if (!spin_trylock_irqsave(&rs->lock, flags))
-               return 1;
+               return 0;
 
        if (!rs->begin)
                rs->begin = jiffies;