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authorTejun Heo2014-05-16 19:22:48 +0200
committerTejun Heo2014-05-16 19:22:48 +0200
commit5c9d535b893f30266ea29fe377cb9b002fcd76aa (patch)
tree27b1fd6e16c5b0c0729a93c4924289119033137c /block
parentcgroup: skip refcnting on normal root csses and cgrp_dfl_root self css (diff)
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cgroup: remove css_parent()
cgroup in general is moving towards using cgroup_subsys_state as the fundamental structural component and css_parent() was introduced to convert from using cgroup->parent to css->parent. It was quite some time ago and we're moving forward with making css more prominent. This patch drops the trivial wrapper css_parent() and let the users dereference css->parent. While at it, explicitly mark fields of css which are public and immutable. v2: New usage from device_cgroup.c converted. Signed-off-by: Tejun Heo <tj@kernel.org> Acked-by: Michal Hocko <mhocko@suse.cz> Acked-by: Neil Horman <nhorman@tuxdriver.com> Acked-by: "David S. Miller" <davem@davemloft.net> Acked-by: Li Zefan <lizefan@huawei.com> Cc: Vivek Goyal <vgoyal@redhat.com> Cc: Jens Axboe <axboe@kernel.dk> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Johannes Weiner <hannes@cmpxchg.org>
Diffstat (limited to 'block')
-rw-r--r--block/blk-cgroup.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/block/blk-cgroup.h b/block/blk-cgroup.h
index 371fe8e92ab5..d692b29c083a 100644
--- a/block/blk-cgroup.h
+++ b/block/blk-cgroup.h
@@ -204,7 +204,7 @@ static inline struct blkcg *bio_blkcg(struct bio *bio)
*/
static inline struct blkcg *blkcg_parent(struct blkcg *blkcg)
{
- return css_to_blkcg(css_parent(&blkcg->css));
+ return css_to_blkcg(blkcg->css.parent);
}
/**