block: prepare for multiple request_lists
authorTejun Heo <tj@kernel.org>
Tue, 5 Jun 2012 03:40:59 +0000 (20:40 -0700)
committerJens Axboe <axboe@kernel.dk>
Mon, 25 Jun 2012 09:53:52 +0000 (11:53 +0200)
commit5b788ce3e2acac9bf109743b1281d77347cf2101
tree907477e42d27bec9a2060fcc709402b7636390c9
parent8a5ecdd42862bf87ceab00bf2a15d7eabf58c02d
block: prepare for multiple request_lists

Request allocation is about to be made per-blkg meaning that there'll
be multiple request lists.

* Make queue full state per request_list.  blk_*queue_full() functions
  are renamed to blk_*rl_full() and takes @rl instead of @q.

* Rename blk_init_free_list() to blk_init_rl() and make it take @rl
  instead of @q.  Also add @gfp_mask parameter.

* Add blk_exit_rl() instead of destroying rl directly from
  blk_release_queue().

* Add request_list->q and make request alloc/free functions -
  blk_free_request(), [__]freed_request(), __get_request() - take @rl
  instead of @q.

This patch doesn't introduce any functional difference.

Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
block/blk-core.c
block/blk-sysfs.c
block/blk.h
include/linux/blkdev.h