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| author | Tejun Heo | 2014-05-16 19:22:48 +0200 |
|---|---|---|
| committer | Tejun Heo | 2014-05-16 19:22:48 +0200 |
| commit | 5c9d535b893f30266ea29fe377cb9b002fcd76aa (patch) | |
| tree | 27b1fd6e16c5b0c0729a93c4924289119033137c /kernel/cgroup.c | |
| parent | cgroup: skip refcnting on normal root csses and cgrp_dfl_root self css (diff) | |
| download | kernel-qcow2-linux-5c9d535b893f30266ea29fe377cb9b002fcd76aa.tar.gz kernel-qcow2-linux-5c9d535b893f30266ea29fe377cb9b002fcd76aa.tar.xz kernel-qcow2-linux-5c9d535b893f30266ea29fe377cb9b002fcd76aa.zip | |
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 'kernel/cgroup.c')
| -rw-r--r-- | kernel/cgroup.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/kernel/cgroup.c b/kernel/cgroup.c index 0343d7ee6d62..929bbbc539e9 100644 --- a/kernel/cgroup.c +++ b/kernel/cgroup.c @@ -3176,10 +3176,10 @@ css_next_descendant_pre(struct cgroup_subsys_state *pos, /* no child, visit my or the closest ancestor's next sibling */ while (pos != root) { - next = css_next_child(pos, css_parent(pos)); + next = css_next_child(pos, pos->parent); if (next) return next; - pos = css_parent(pos); + pos = pos->parent; } return NULL; @@ -3261,12 +3261,12 @@ css_next_descendant_post(struct cgroup_subsys_state *pos, return NULL; /* if there's an unvisited sibling, visit its leftmost descendant */ - next = css_next_child(pos, css_parent(pos)); + next = css_next_child(pos, pos->parent); if (next) return css_leftmost_descendant(next); /* no sibling left, visit parent */ - return css_parent(pos); + return pos->parent; } static bool cgroup_has_live_children(struct cgroup *cgrp) |