perf, x86: Clean up reserve_ds_buffers() signature

Now that reserve_ds_buffers() never fails, change it to return
void and remove all code dealing with the error return.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Acked-by: Stephane Eranian <eranian@google.com>
LKML-Reference: <20101019134808.462621937@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 3 insertions, 6 deletions

diff --git a/arch/x86/kernel/cpu/perf_event.c b/arch/x86/kernel/cpu/perf_event.c
index 61e78f651060..a333bf9189f6 100644
--- a/arch/x86/kernel/cpu/perf_event.c
+++ b/arch/x86/kernel/cpu/perf_event.c
@@ -382,7 +382,7 @@ static void release_pmc_hardware(void) {}
 
 #endif
 
-static int reserve_ds_buffers(void);
+static void reserve_ds_buffers(void);
 static void release_ds_buffers(void);
 
 static void hw_perf_event_destroy(struct perf_event *event)
@@ -546,11 +546,8 @@ static int __x86_pmu_event_init(struct perf_event *event)
                 if (atomic_read(&active_events) == 0) {
                         if (!reserve_pmc_hardware())
                                 err = -EBUSY;
-                        else {
-                                err = reserve_ds_buffers();
-                                if (err)
-                                        release_pmc_hardware();
-                        }
+                        else
+                                reserve_ds_buffers();
                 }
                 if (!err)
                         atomic_inc(&active_events);