block, cfq: move cfqd->cic_index to q->id
commita73f730d013ff2788389fd0c46ad3e5510f124e6
authorTejun Heo <tj@kernel.org>
Tue, 13 Dec 2011 23:33:37 +0000 (14 00:33 +0100)
committerJens Axboe <axboe@kernel.dk>
Tue, 13 Dec 2011 23:33:37 +0000 (14 00:33 +0100)
tree773987c8cbec56745d46f46382ad268ed91adf98
parent8ba61435d73f2274e12d4d823fde06735e8f6a54
block, cfq: move cfqd->cic_index to q->id

cfq allocates per-queue id using ida and uses it to index cic radix
tree from io_context.  Move it to q->id and allocate on queue init and
free on queue release.  This simplifies cfq a bit and will allow for
further improvements of io context life-cycle management.

This patch doesn't introduce any functional difference.

Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
block/blk-core.c
block/blk-sysfs.c
block/blk.h
block/cfq-iosched.c
include/linux/blkdev.h