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| author | Tejun Heo <tj@kernel.org> | 2015-09-18 11:56:28 -0400 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2015-09-18 11:56:28 -0400 |
| commit | 9e10a130d9b62af976d17d120c95f3650769312c (patch) | |
| tree | 2a580955a56434f6e7c455a8f0ebf6eec71a9194 /block/blk-throttle.c | |
| parent | fc5ed1e95410ad73b2ab8f33cd90eb3bcf6c98a1 (diff) | |
| download | op-kernel-dev-9e10a130d9b62af976d17d120c95f3650769312c.zip op-kernel-dev-9e10a130d9b62af976d17d120c95f3650769312c.tar.gz | |
cgroup: replace cgroup_on_dfl() tests in controllers with cgroup_subsys_on_dfl()
cgroup_on_dfl() tests whether the cgroup's root is the default
hierarchy; however, an individual controller is only interested in
whether the controller is attached to the default hierarchy and never
tests a cgroup which doesn't belong to the hierarchy that the
controller is attached to.
This patch replaces cgroup_on_dfl() tests in controllers with faster
static_key based cgroup_subsys_on_dfl(). This leaves cgroup core as
the only user of cgroup_on_dfl() and the function is moved from the
header file to cgroup.c.
Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Zefan Li <lizefan@huawei.com>
Cc: Vivek Goyal <vgoyal@redhat.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@kernel.org>
Diffstat (limited to 'block/blk-throttle.c')
| -rw-r--r-- | block/blk-throttle.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/block/blk-throttle.c b/block/blk-throttle.c index c75a263..2149a1d 100644 --- a/block/blk-throttle.c +++ b/block/blk-throttle.c @@ -369,7 +369,7 @@ static void throtl_pd_init(struct blkg_policy_data *pd) * regardless of the position of the group in the hierarchy. */ sq->parent_sq = &td->service_queue; - if (cgroup_on_dfl(blkg->blkcg->css.cgroup) && blkg->parent) + if (cgroup_subsys_on_dfl(io_cgrp_subsys) && blkg->parent) sq->parent_sq = &blkg_to_tg(blkg->parent)->service_queue; tg->td = td; } |
