blk-cgroup: check for pd_(alloc|free)_fn in blkcg_activate_policy()

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Currently all policies implement pd_(alloc|free)_fn, however, this is
not necessary for ioprio that only works for blkcg, not blkg.

There are no functional changes, prepare to cleanup activating ioprio
policy.

Signed-off-by: Yu Kuai <yukuai3@huawei.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Acked-by: Tejun Heo <tj@kernel.org>
Link: https://lore.kernel.org/r/20240719071506.158075-2-yukuai1@huaweicloud.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>

...

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Yu Kuai 2024-07-19 15:15:04 +08:00 • committed by Jens Axboe

parent 8400291e28

commit ae8650b45d

1 changed files with 13 additions and 2 deletions

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block/blk-cgroup.c

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