Add unlikely() to indicate that underflow of per-cpu counter sum is not expected. The underflow is already handled, but should have been marked unlikely. Reported-by: Wu Fengguang <fengguang.wu@xxxxxxxxx> Signed-off-by: Greg Thelen <gthelen@xxxxxxxxxx> --- mm/memcontrol.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/mm/memcontrol.c b/mm/memcontrol.c index ed070d0..e8fbade 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -1393,7 +1393,7 @@ unsigned long mem_cgroup_page_stat(struct mem_cgroup *mem, * value. This function returns an unsigned value, so round it up to * zero to avoid returning a very large value. */ - if (value < 0) + if (unlikely(value < 0)) value = 0; put_online_cpus(); -- 1.7.3.1 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom policy in Canada: sign http://dissolvethecrtc.ca/ Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>