Commit-ID: 615a3f1e055ac9b0ae74e1f935a12ea2cfe2a2ad
Gitweb: http://git.kernel.org/tip/615a3f1e055ac9b0ae74e1f935a12ea2cfe2a2ad
Author: Paul Mackerras <paulus@xxxxxxxxx>
AuthorDate: Mon, 11 May 2009 15:50:21 +1000
Committer: Ingo Molnar <mingo@xxxxxxx>
CommitDate: Mon, 11 May 2009 12:10:54 +0200
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@xxxxxxxxx>
Cc: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
Cc: Corey Ashford <cjashfor@xxxxxxxxxxxxxxxxxx>
LKML-Reference: <18951.48285.270311.981806@xxxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Ingo Molnar <mingo@xxxxxxx>
---
kernel/perf_counter.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
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 unsigned int perf_poll(struct file *file, poll_table *wait)
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);
}
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