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percpu: fix a memory leak in pcpu_extend_area_map()

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The original code did not free the old map.  This patch fixes it.

tj: use @old as memcpy source instead of @chunk->map, and indentation
    and description update

Signed-off-by: Huang Shijie <shijie8@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: stable@kernel.org
This commit is contained in:
Huang Shijie 2010-08-08 14:39:07 +02:00 committed by Tejun Heo
parent 94cb121c94
commit a002d14842
1 changed files with 3 additions and 1 deletions
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4
mm/percpu.c
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@ -393,7 +393,9 @@ static int pcpu_extend_area_map(struct pcpu_chunk *chunk, int new_alloc)
goto out_unlock;
old_size = chunk->map_alloc * sizeof(chunk->map[0]);
memcpy(new, chunk->map, old_size);
old = chunk->map;
memcpy(new, old, old_size);
chunk->map_alloc = new_alloc;
chunk->map = new;