cgroup: fix some comment typos

s/effctive/effective
s/hierarhcy/hierarchy
s/shoulid/should

Signed-off-by: Chen Hanxiao <chenhanxiao@cn.fujitsu.com>
Signed-off-by: Tejun Heo <tj@kernel.org>

diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index 469dd547770ca352fe5aae2f22c689366b721c26..cfa27f968e6f07a7cf434b9b9647d0530c7973e3 100644 (file)
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -261,7 +261,7 @@ static struct cgroup_subsys_state *cgroup_css(struct cgroup *cgrp,
  * @cgrp: the cgroup of interest
  * @ss: the subsystem of interest (%NULL returns @cgrp->self)
  *
- * Similar to cgroup_css() but returns the effctive css, which is defined
+ * Similar to cgroup_css() but returns the effective css, which is defined
  * as the matching css of the nearest ancestor including self which has @ss
  * enabled.  If @ss is associated with the hierarchy @cgrp is on, this
  * function is guaranteed to return non-NULL css.
@@ -882,7 +882,7 @@ static void cgroup_exit_root_id(struct cgroup_root *root)
 static void cgroup_free_root(struct cgroup_root *root)
 {
        if (root) {
-               /* hierarhcy ID shoulid already have been released */
+               /* hierarchy ID should already have been released */
                WARN_ON_ONCE(root->hierarchy_id);
 
                idr_destroy(&root->cgroup_idr);