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authorMike Snitzer <snitzer@redhat.com>2010-05-11 08:57:42 +0200
committerJens Axboe <jens.axboe@oracle.com>2010-05-11 08:57:42 +0200
commit01effb0dc1451fad55925873ffbfb88fa4eadce0 (patch)
tree40fc70111217d23bbb5453fe08214d28ed4c7713 /block/blk-merge.c
parent0f3942a39ed768c967cb71ea0e9be7fc94112713 (diff)
block: allow initialization of previously allocated request_queue
blk_init_queue() allocates the request_queue structure and then initializes it as needed (request_fn, elevator, etc). Split initialization out to blk_init_allocated_queue_node. Introduce blk_init_allocated_queue wrapper function to model existing blk_init_queue and blk_init_queue_node interfaces. Export elv_register_queue to allow a newly added elevator to be registered with sysfs. Export elv_unregister_queue for symmetry. These changes allow DM to initialize a device's request_queue with more precision. In particular, DM no longer unconditionally initializes a full request_queue (elevator et al). It only does so for a request-based DM device. Signed-off-by: Mike Snitzer <snitzer@redhat.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'block/blk-merge.c')
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