block: don't access jiffies when initialising io_context
Richard Kennedy [Mon, 1 Mar 2010 09:57:22 +0000 (10:57 +0100)]
As the comment says the initial value of last_waited is never used, so
there is no need to initialise it with the current jiffies. Jiffies is
hot enough without accessing it for no reason.

Signed-off-by: Richard Kennedy <richard@rsk.demon.co.uk>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

block/blk-ioc.c

index 98e6bf6..3f65c8a 100644 (file)
@@ -91,7 +91,7 @@ struct io_context *alloc_io_context(gfp_t gfp_flags, int node)
                spin_lock_init(&ret->lock);
                ret->ioprio_changed = 0;
                ret->ioprio = 0;
-               ret->last_waited = jiffies; /* doesn't matter... */
+               ret->last_waited = 0; /* doesn't matter... */
                ret->nr_batch_requests = 0; /* because this is 0 */
                INIT_RADIX_TREE(&ret->radix_root, GFP_ATOMIC | __GFP_HIGH);
                INIT_HLIST_HEAD(&ret->cic_list);