From: tip-bot for Peter Zijlstra on
Commit-ID: 3adaebd69557615c1bf0365ce5e32d93ac7d82af
Author: Peter Zijlstra <a.p.zijlstra(a)>
AuthorDate: Fri, 5 Mar 2010 12:09:29 +0100
Committer: Ingo Molnar <mingo(a)>
CommitDate: Wed, 10 Mar 2010 13:23:34 +0100

perf, x86: Fix silly bug in data store buffer allocation

Fix up the ds allocation error path, where we could free @buffer before
we used it.

Signed-off-by: Peter Zijlstra <a.p.zijlstra(a)>
Cc: Arnaldo Carvalho de Melo <acme(a)>
Cc: paulus(a)
Cc: eranian(a)
Cc: robert.richter(a)
Cc: fweisbec(a)
LKML-Reference: <20100305154128.813452402(a)>
Signed-off-by: Ingo Molnar <mingo(a)>
arch/x86/kernel/cpu/perf_event_intel_ds.c | 4 +---
1 files changed, 1 insertions(+), 3 deletions(-)

diff --git a/arch/x86/kernel/cpu/perf_event_intel_ds.c b/arch/x86/kernel/cpu/perf_event_intel_ds.c
index 72453ac..a67fff1 100644
--- a/arch/x86/kernel/cpu/perf_event_intel_ds.c
+++ b/arch/x86/kernel/cpu/perf_event_intel_ds.c
@@ -127,10 +127,8 @@ static int reserve_ds_buffers(void)

err = -ENOMEM;
ds = kzalloc(sizeof(*ds), GFP_KERNEL);
- if (unlikely(!ds)) {
- kfree(buffer);
+ if (unlikely(!ds))
- }
per_cpu(cpu_hw_events, cpu).ds = ds;

if (x86_pmu.bts) {
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