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authorTejun Heo <tj@kernel.org>2013-01-07 08:51:07 -0800
committerTejun Heo <tj@kernel.org>2013-01-07 08:51:07 -0800
commit0772324ae669f787b42fdb9fc5ac2c3d1c0df509 (patch)
tree6a7aacbd773a1b3867c6bd2d62c796b79a3579fd /kernel/cpuset.c
parent01c889cf4f2e16c9a21376f8583f4a2872d7d1da (diff)
cpuset: remove fast exit path from remove_tasks_in_empty_cpuset()
The function isn't that hot, the overhead of missing the fast exit is low, the test itself depends heavily on cgroup internals, and it's gonna be a hindrance when trying to decouple cpuset locking from cgroup core. Remove the fast exit path. Signed-off-by: Tejun Heo <tj@kernel.org> Acked-by: Li Zefan <lizefan@huawei.com>
Diffstat (limited to 'kernel/cpuset.c')
-rw-r--r--kernel/cpuset.c8
1 files changed, 0 insertions, 8 deletions
diff --git a/kernel/cpuset.c b/kernel/cpuset.c
index 854b8bfbc15..5372b6f5e5b 100644
--- a/kernel/cpuset.c
+++ b/kernel/cpuset.c
@@ -1968,14 +1968,6 @@ static void remove_tasks_in_empty_cpuset(struct cpuset *cs)
struct cpuset *parent;
/*
- * The cgroup's css_sets list is in use if there are tasks
- * in the cpuset; the list is empty if there are none;
- * the cs->css.refcnt seems always 0.
- */
- if (list_empty(&cs->css.cgroup->css_sets))
- return;
-
- /*
* Find its next-highest non-empty parent, (top cpuset
* has online cpus, so can't be empty).
*/