From: Martin Peschke <mp3@de.ibm.com>

In case of CPU hotunplug statistics might have leaked some memory (lists of
struct statistic_entry_sparse, about 32 byte each, freed by
statistic_sparse_reset()).

Signed-off-by: Martin Peschke <mp3@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 lib/statistic.c |    1 +
 1 files changed, 1 insertion(+)

diff -puN lib/statistic.c~statistics-infrastructure-fix-cpu-hot-unplug-related-memory-leak lib/statistic.c
--- a/lib/statistic.c~statistics-infrastructure-fix-cpu-hot-unplug-related-memory-leak
+++ a/lib/statistic.c
@@ -308,6 +308,7 @@ static int _statistic_hotcpu(struct stat
 		src = percpu_ptr(stat->data, cpu);
 		disc->merge(stat, dst, src);
 		local_irq_restore(flags);
+		disc->reset(stat, src);
 		percpu_depopulate(stat->data, cpu);
 		break;
 	}
_