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linux/block/blk-cgroup.c
weiping zhang e840107322 blkcg: add sanity check for blkcg policy operations 
blkcg policy should keep cpd/pd's alloc_fn and free_fn in pairs,
otherwise policy would register fail.

Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: weiping zhang <zhangweiping@didichuxing.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2017-11-04 12:31:15 -06:00

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