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block: only allocate/free mq_usage_counter in blk-mq
authorMing Lei <tom.leiming@gmail.com>
Tue, 27 May 2014 15:35:14 +0000 (23:35 +0800)
committerJens Axboe <axboe@fb.com>
Tue, 27 May 2014 15:37:08 +0000 (09:37 -0600)
The percpu counter is only used for blk-mq, so move
its allocation and free inside blk-mq, and don't
allocate it for legacy queue device.

Signed-off-by: Ming Lei <tom.leiming@gmail.com>
Signed-off-by: Jens Axboe <axboe@fb.com>

No differences found
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