[PATCH] perf_counter: call atomic64_set for counter->count

[PATCH] perf_counter: call atomic64_set for counter->count

[Paul Mackerras]

This fixes a compile warning where we are calling
atomic_set(&counter->count).  Since counter->count is an atomic64_t,
we have to use atomic64_set.

[ Impact: fix type mismatch bug ]

Signed-off-by: Paul Mackerras <paulus@samba.org>
---

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);
 }
 

[tip:perfcounters/core] perf_counter: call atomic64_set for counter->count

[tip-bot for Paul Mackerras]

Commit-ID:  615a3f1e055ac9b0ae74e1f935a12ea2cfe2a2ad
Gitweb:     http://git.kernel.org/tip/615a3f1e055ac9b0ae74e1f935a12ea2cfe2a2ad
Author:     Paul Mackerras <paulus@samba.org>
AuthorDate: Mon, 11 May 2009 15:50:21 +1000
Committer:  Ingo Molnar <mingo@elte.hu>
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@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>


---
 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);
 }