From 565e411d764eeda006738dfadbccca79d48381e1 Mon Sep 17 00:00:00 2001 From: "malahal@us.ibm.com" Date: Thu, 30 Oct 2008 08:51:58 +0100 Subject: [PATCH] block: optimizations in blk_rq_timed_out_timer() Now the rq->deadline can't be zero if the request is in the timeout_list, so there is no need to have next_set. There is no need to access a request's deadline field if blk_rq_timed_out is called on it. Signed-off-by: Malahal Naineni Signed-off-by: Jens Axboe --- block/blk-timeout.c | 10 ++++------ 1 file changed, 4 insertions(+), 6 deletions(-) diff --git a/block/blk-timeout.c b/block/blk-timeout.c index 69185ea..116bbf3 100644 --- a/block/blk-timeout.c +++ b/block/blk-timeout.c @@ -111,7 +111,7 @@ static void blk_rq_timed_out(struct request *req) void blk_rq_timed_out_timer(unsigned long data) { struct request_queue *q = (struct request_queue *) data; - unsigned long flags, uninitialized_var(next), next_set = 0; + unsigned long flags, next = 0; struct request *rq, *tmp; spin_lock_irqsave(q->queue_lock, flags); @@ -126,12 +126,10 @@ void blk_rq_timed_out_timer(unsigned long data) if (blk_mark_rq_complete(rq)) continue; blk_rq_timed_out(rq); + } else { + if (!next || time_after(next, rq->deadline)) + next = rq->deadline; } - if (!next_set) { - next = rq->deadline; - next_set = 1; - } else if (time_after(next, rq->deadline)) - next = rq->deadline; } if (next_set && !list_empty(&q->timeout_list)) -- 2.7.4