From b2fab5acd28ead6f0dd6c3996ba23f0ef1772f15 Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Mon, 5 Mar 2012 13:14:57 -0800 Subject: elevator: make elevator_init_fn() return 0/-errno elevator_ops->elevator_init_fn() has a weird return value. It returns a void * which the caller should assign to q->elevator->elevator_data and %NULL return denotes init failure. Update such that it returns integer 0/-errno and sets elevator_data directly as necessary. This makes the interface more conventional and eases further cleanup. Signed-off-by: Tejun Heo Cc: Vivek Goyal Signed-off-by: Jens Axboe --- block/noop-iosched.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) (limited to 'block/noop-iosched.c') diff --git a/block/noop-iosched.c b/block/noop-iosched.c index 413a0b1d788c..5d1bf70e33d5 100644 --- a/block/noop-iosched.c +++ b/block/noop-iosched.c @@ -59,15 +59,17 @@ noop_latter_request(struct request_queue *q, struct request *rq) return list_entry(rq->queuelist.next, struct request, queuelist); } -static void *noop_init_queue(struct request_queue *q) +static int noop_init_queue(struct request_queue *q) { struct noop_data *nd; nd = kmalloc_node(sizeof(*nd), GFP_KERNEL, q->node); if (!nd) - return NULL; + return -ENOMEM; + INIT_LIST_HEAD(&nd->queue); - return nd; + q->elevator->elevator_data = nd; + return 0; } static void noop_exit_queue(struct elevator_queue *e) -- cgit v1.2.3