diff options
Diffstat (limited to 'block/ll_rw_blk.c')
| -rw-r--r-- | block/ll_rw_blk.c | 25 |
1 files changed, 20 insertions, 5 deletions
diff --git a/block/ll_rw_blk.c b/block/ll_rw_blk.c index c6dfa889206..346be9ae31f 100644 --- a/block/ll_rw_blk.c +++ b/block/ll_rw_blk.c @@ -2267,6 +2267,25 @@ struct request *blk_get_request(request_queue_t *q, int rw, gfp_t gfp_mask) EXPORT_SYMBOL(blk_get_request); /** + * blk_start_queueing - initiate dispatch of requests to device + * @q: request queue to kick into gear + * + * This is basically a helper to remove the need to know whether a queue + * is plugged or not if someone just wants to initiate dispatch of requests + * for this queue. + * + * The queue lock must be held with interrupts disabled. + */ +void blk_start_queueing(request_queue_t *q) +{ + if (!blk_queue_plugged(q)) + q->request_fn(q); + else + __generic_unplug_device(q); +} +EXPORT_SYMBOL(blk_start_queueing); + +/** * blk_requeue_request - put a request back on queue * @q: request queue where request should be inserted * @rq: request to be inserted @@ -2333,11 +2352,7 @@ void blk_insert_request(request_queue_t *q, struct request *rq, drive_stat_acct(rq, rq->nr_sectors, 1); __elv_add_request(q, rq, where, 0); - - if (blk_queue_plugged(q)) - __generic_unplug_device(q); - else - q->request_fn(q); + blk_start_queueing(q); spin_unlock_irqrestore(q->queue_lock, flags); } |