block, cfq: restructure io_cq creation path for io_context interface cleanup
authorTejun Heo <tj@kernel.org>
Tue, 13 Dec 2011 23:33:42 +0000 (00:33 +0100)
committerJens Axboe <axboe@kernel.dk>
Tue, 13 Dec 2011 23:33:42 +0000 (00:33 +0100)
commit9b84cacd013996f244d85b3d873287c2a8f88658
treea11b850f9c8b182a7a8141276244a831aaae5291
parent7e5a8794492e43e9eebb68a98a23be055888ccd0
block, cfq: restructure io_cq creation path for io_context interface cleanup

Add elevator_ops->elevator_init_icq_fn() and restructure
cfq_create_cic() and rename it to ioc_create_icq().

The new function expects its caller to pass in io_context, uses
elevator_type->icq_cache, handles generic init, calls the new elevator
operation for elevator specific initialization, and returns pointer to
created or looked up icq.  This leaves cfq_icq_pool variable without
any user.  Removed.

This prepares for io_context interface cleanup and doesn't introduce
any functional difference.

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