xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

cgroup: remove css_parent()

Browse Source 
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>
This commit is contained in:
Tejun Heo
2014-05-16 13:22:48 -04:00
parent 3b514d24e2
commit 5c9d535b89
12 changed files with 34 additions and 41 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
kernel/cgroup.c
View File

@@ -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)