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cgroup: export css_next_descendant_pre for bfq

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The bfq schedule now uses css_next_descendant_pre directly after
the stats functionality depending on it has been from the core
blk-cgroup code to bfq.  Export the symbol so that bfq can still
be build modular.

Fixes: d6258980da ("bfq-iosched: move bfq_stat_recursive_sum into the only caller")
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig 2019-06-21 10:22:48 +02:00 • committed by Jens Axboe
parent 8d54094ef4
commit 474a280036
1 changed files with 1 additions and 0 deletions
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kernel/cgroup/cgroup.c
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@ -4221,6 +4221,7 @@ css_next_descendant_pre(struct cgroup_subsys_state *pos,
return NULL;
}
EXPORT_SYMBOL_GPL(css_next_descendant_pre);
/**
* css_rightmost_descendant - return the rightmost descendant of a css