weiping zhang 58a9edce0a blkcg: check pol->cpd_free_fn before free cpd
check pol->cpd_free_fn() instead of pol->cpd_alloc_fn() when free cpd.

Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: weiping zhang <zhangweiping@didichuxing.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2017-10-10 09:04:47 -06:00
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