From: Paul Mackerras <paulus@samba.org>
Date: Mon, 11 May 2009 05:50:21 +0000 (+1000)
Subject: perf_counter: call atomic64_set for counter->count
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=615a3f1e055ac9b0ae74e1f935a12ea2cfe2a2ad;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

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 7373b96bc36c..5ea0240adab2 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);
 }