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| author | Tejun Heo <tj@kernel.org> | 2015-05-22 23:13:21 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2015-06-02 16:33:33 +0200 |
| commit | 496d5e7560dbb84399dbd92316fc33857aa83900 (patch) | |
| tree | 1e60d21e0c680643251ee309382abd7d46d11e67 /block | |
| parent | memcg: add mem_cgroup_root_css (diff) | |
| download | linux-496d5e7560dbb84399dbd92316fc33857aa83900.tar.xz linux-496d5e7560dbb84399dbd92316fc33857aa83900.zip | |
blkcg: add blkcg_root_css
Add global constant blkcg_root_css which points to &blkcg_root.css.
This will be used by cgroup writeback support. If blkcg is disabled,
it's defined as ERR_PTR(-EINVAL).
v2: The declarations moved to include/linux/blk-cgroup.h as suggested
by Vivek.
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Vivek Goyal <vgoyal@redhat.com>
Cc: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'block')
| -rw-r--r-- | block/blk-cgroup.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/block/blk-cgroup.c b/block/blk-cgroup.c index 2a4f77f2b229..54ec1721cd3e 100644 --- a/block/blk-cgroup.c +++ b/block/blk-cgroup.c @@ -30,6 +30,8 @@ struct blkcg blkcg_root = { .cfq_weight = 2 * CFQ_WEIGHT_DEFAULT, .cfq_leaf_weight = 2 * CFQ_WEIGHT_DEFAULT, }; EXPORT_SYMBOL_GPL(blkcg_root); +struct cgroup_subsys_state * const blkcg_root_css = &blkcg_root.css; + static struct blkcg_policy *blkcg_policy[BLKCG_MAX_POLS]; static bool blkcg_policy_enabled(struct request_queue *q, |