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perf/hwbp: Fix a possible memory leak

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If kzalloc() for TYPE_DATA failed on a given cpu, previous chunk
of TYPE_INST will be leaked. Fix it.

Thanks to Peter Zijlstra for suggesting this better solution. It
should work as long as the initial value of the region is all
0's and that's the case of static (per-cpu) memory allocation.

Signed-off-by: Namhyung Kim <namhyung.kim@lge.com>
Acked-by: Frederic Weisbecker <fweisbec@gmail.com>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
Link: http://lkml.kernel.org/r/1330391978-28070-1-git-send-email-namhyung.kim@lge.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Namhyung Kim 2012-02-28 10:19:38 +09:00 committed by Ingo Molnar
parent 5ffca28a4a
commit 30ce2f7eef
1 changed files with 2 additions and 2 deletions
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4
kernel/events/hw_breakpoint.c
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@ -651,10 +651,10 @@ int __init init_hw_breakpoint(void)
err_alloc:
for_each_possible_cpu(err_cpu) {
if (err_cpu == cpu)
break;
for (i = 0; i < TYPE_MAX; i++)
kfree(per_cpu(nr_task_bp_pinned[i], cpu));
if (err_cpu == cpu)
break;
}
return -ENOMEM;