[PATCH v2] cgroup/cpuset: Improve cpuset_css_alloc() description

[Kamalesh Babulal]

Change the function argument in the description of cpuset_css_alloc()
from 'struct cgroup' -> 'struct cgroup_subsys_state'.  The change to the
argument type was introduced by commit eb95419b023a ("cgroup: pass
around cgroup_subsys_state instead of cgroup in subsystem methods").
Also, add more information to its description.

Signed-off-by: Kamalesh Babulal <kamalesh.babulal@xxxxxxxxxx>
---
v2: Reworded the description to be more accurate, as suggested
    by Waiman Long

 kernel/cgroup/cpuset.c | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/kernel/cgroup/cpuset.c b/kernel/cgroup/cpuset.c
index b474289c15b8..ce789e1b2a2f 100644
--- a/kernel/cgroup/cpuset.c
+++ b/kernel/cgroup/cpuset.c
@@ -3046,11 +3046,15 @@ static struct cftype dfl_files[] = {
 };
 
 
-/*
- *	cpuset_css_alloc - allocate a cpuset css
- *	cgrp:	control group that the new cpuset will be part of
+/**
+ * cpuset_css_alloc - Allocate a cpuset css
+ * @parent_css: Parent css of the control group that the new cpuset will be
+ *              part of
+ * Return: cpuset css on success, -ENOMEM on failure.
+ *
+ * Allocate and initialize a new cpuset css, for non-NULL @parent_css, return
+ * top cpuset css otherwise.
  */
-
 static struct cgroup_subsys_state *
 cpuset_css_alloc(struct cgroup_subsys_state *parent_css)
 {
-- 
2.34.3