It is unnecessary to continue looping the list, if we find there is an entry that the value of rating is smaller than the new one. It is safe to be out the loop, because all of entry are inserted in descending order.
Signed-off-by: Minfei Huang <[email protected]> --- kernel/time/clocksource.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/kernel/time/clocksource.c b/kernel/time/clocksource.c index 56ece14..6a5a310 100644 --- a/kernel/time/clocksource.c +++ b/kernel/time/clocksource.c @@ -669,10 +669,12 @@ static void clocksource_enqueue(struct clocksource *cs) struct list_head *entry = &clocksource_list; struct clocksource *tmp; - list_for_each_entry(tmp, &clocksource_list, list) + list_for_each_entry(tmp, &clocksource_list, list) { /* Keep track of the place, where to insert */ - if (tmp->rating >= cs->rating) - entry = &tmp->list; + if (tmp->rating < cs->rating) + break; + entry = &tmp->list; + } list_add(&cs->list, entry); } -- 2.6.3
