cgroup: export css_next_descendant_pre for bfq
authorChristoph Hellwig <hch@lst.de>
Fri, 21 Jun 2019 08:22:48 +0000 (10:22 +0200)
committerJens Axboe <axboe@kernel.dk>
Fri, 21 Jun 2019 08:48:34 +0000 (02:48 -0600)
commit474a280036e8d319ef852f1dec59bedf4eda0107
tree1c947b4d8306f45a8220e3e33895434dbdacf962
parent8d54094ef430d89cea75ef586183f05a7c9a2b22
cgroup: export css_next_descendant_pre for bfq

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: d6258980daf2 ("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>
kernel/cgroup/cgroup.c