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percpu: clear memory allocated with the km allocator 

Percpu allocator should clear memory before returning it but the km
allocator forgot to do it.  Fix it.

Signed-off-by: Tejun Heo <tj@kernel.org>
Reported-by: Peter Zijlstra <peterz@infradead.org>
Acked-by: Peter Zijlstra <peterz@infradead.org>
This commit is contained in:
Tejun Heo 2010-09-10 10:49:37 +02:00 committed by Pekka Enberg
parent 9b8327bb24
commit ed6c1115c8
1 changed files with 5 additions and 1 deletions
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6
mm/percpu-km.c
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@ -35,7 +35,11 @@
static int pcpu_populate_chunk(struct pcpu_chunk *chunk, int off, int size)
{
/* noop */
unsigned int cpu;
for_each_possible_cpu(cpu)
memset((void *)pcpu_chunk_addr(chunk, cpu, 0) + off, 0, size);
return 0;
}