this call should use the array index j, not i.  But with this approach, just
one int i is enough, int j is not needed.
Signed-off-by: NDenis Cheng <crquan@gmail.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>