Prev: [PATCH] power/ds2760_battery: document ABI change
Next: Uprobes v4
From: Jason Baron on 18 May 2010 16:50
Hi,

I'm getting the following warnings:

In file included from arch/x86/kernel/cpu/perf_event.c:1343:
arch/x86/kernel/cpu/perf_event_amd.c: In function
'amd_put_event_constraints':
arch/x86/kernel/cpu/perf_event_amd.c:167: warning: value computed is not
used

Since cmpxchg returns a value, we need to use it. We can use it to test if its
equal to "event".

thanks,

-Jason

Signed-off-by: Jason Baron <jbaron(a)redhat.com>
---
arch/x86/kernel/cpu/perf_event_amd.c | 4 +---
1 files changed, 1 insertions(+), 3 deletions(-)

diff --git a/arch/x86/kernel/cpu/perf_event_amd.c b/arch/x86/kernel/cpu/perf_event_amd.c
index 611df11..e13ce4a 100644
--- a/arch/x86/kernel/cpu/perf_event_amd.c
+++ b/arch/x86/kernel/cpu/perf_event_amd.c
@@ -163,10 +163,8 @@ static void amd_put_event_constraints(struct cpu_hw_events *cpuc,
* when we come here
*/
for (i = 0; i < x86_pmu.num_counters; i++) {
- if (nb->owners[i] == event) {
- cmpxchg(nb->owners+i, event, NULL);
+ if (cmpxchg(nb->owners+i, event, NULL) == event)
break;
- }
}
}

--
1.7.0.1

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo(a)vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
 | 
Pages: 1
Prev: [PATCH] power/ds2760_battery: document ABI change
Next: Uprobes v4