perf_counter: call atomic64_set for counter->count
A compile warning triggered because we are calling
atomic_set(&counter->count). But since counter->count
is an atomic64_t, we have to use atomic64_set.
So the count can be set short, resulting in the reset ioctl
only resetting the low word.
[ Impact: clear counter properly during the reset ioctl ]
Signed-off-by: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
LKML-Reference: <18951.48285.270311.981806@drongo.ozlabs.ibm.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/kernel/perf_counter.c b/kernel/perf_counter.c
index 7373b96..5ea0240 100644
--- a/kernel/perf_counter.c
+++ b/kernel/perf_counter.c
@@ -1281,7 +1281,7 @@
static void perf_counter_reset(struct perf_counter *counter)
{
(void)perf_counter_read(counter);
- atomic_set(&counter->count, 0);
+ atomic64_set(&counter->count, 0);
perf_counter_update_userpage(counter);
}