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cgroup: make CSS_* flags bit masks instead of bit positions

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Currently, CSS_* flags are defined as bit positions and manipulated
using atomic bitops.  There's no reason to use atomic bitops for them
and bit positions are clunkier to deal with than bit masks.  Make
CSS_* bit masks instead and use the usual C bitwise operators to
access them.

Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Li Zefan <lizefan@huawei.com>
This commit is contained in:
Tejun Heo
2012-11-19 08:13:36 -08:00
parent febfcef60d
commit 38b53abaa3
2 changed files with 5 additions and 5 deletions
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2
kernel/cgroup.c
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@@ -4020,7 +4020,7 @@ static void init_cgroup_css(struct cgroup_subsys_state *css,
css->flags = 0;
css->id = NULL;
if (cgrp == dummytop)
set_bit(CSS_ROOT, &css->flags);
css->flags |= CSS_ROOT;
BUG_ON(cgrp->subsys[ss->subsys_id]);
cgrp->subsys[ss->subsys_id] = css;