cgroup: rename cont to cgrp

Cont is short for container. control group was named process container
at first, but then people found container already has a meaning in
linux kernel.

Clean up the leftover variable name @cont.

Signed-off-by: Li Zefan <lizefan@huawei.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index 65f333e..1051c1f 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -5515,7 +5515,7 @@
 }
 
 #ifdef CONFIG_CGROUP_DEBUG
-static struct cgroup_subsys_state *debug_css_alloc(struct cgroup *cont)
+static struct cgroup_subsys_state *debug_css_alloc(struct cgroup *cgrp)
 {
 	struct cgroup_subsys_state *css = kzalloc(sizeof(*css), GFP_KERNEL);
 
@@ -5525,23 +5525,23 @@
 	return css;
 }
 
-static void debug_css_free(struct cgroup *cont)
+static void debug_css_free(struct cgroup *cgrp)
 {
-	kfree(cont->subsys[debug_subsys_id]);
+	kfree(cgrp->subsys[debug_subsys_id]);
 }
 
-static u64 debug_taskcount_read(struct cgroup *cont, struct cftype *cft)
+static u64 debug_taskcount_read(struct cgroup *cgrp, struct cftype *cft)
 {
-	return cgroup_task_count(cont);
+	return cgroup_task_count(cgrp);
 }
 
-static u64 current_css_set_read(struct cgroup *cont, struct cftype *cft)
+static u64 current_css_set_read(struct cgroup *cgrp, struct cftype *cft)
 {
 	return (u64)(unsigned long)current->cgroups;
 }
 
-static u64 current_css_set_refcount_read(struct cgroup *cont,
-					   struct cftype *cft)
+static u64 current_css_set_refcount_read(struct cgroup *cgrp,
+					 struct cftype *cft)
 {
 	u64 count;
 
@@ -5551,7 +5551,7 @@
 	return count;
 }
 
-static int current_css_set_cg_links_read(struct cgroup *cont,
+static int current_css_set_cg_links_read(struct cgroup *cgrp,
 					 struct cftype *cft,
 					 struct seq_file *seq)
 {
@@ -5578,14 +5578,14 @@
 }
 
 #define MAX_TASKS_SHOWN_PER_CSS 25
-static int cgroup_css_links_read(struct cgroup *cont,
+static int cgroup_css_links_read(struct cgroup *cgrp,
 				 struct cftype *cft,
 				 struct seq_file *seq)
 {
 	struct cgrp_cset_link *link;
 
 	read_lock(&css_set_lock);
-	list_for_each_entry(link, &cont->cset_links, cset_link) {
+	list_for_each_entry(link, &cgrp->cset_links, cset_link) {
 		struct css_set *cset = link->cset;
 		struct task_struct *task;
 		int count = 0;