cgroup: relocate cgroup_advance_iter()

For some reason, cgroup_advance_iter() is standing lonely all away
from its iter comrades.  Relocate it.

This is cosmetic.

Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Li Zefan <lizefan@huawei.com>

diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index 91eac33fac86f7d2a78332bdca6c130ce555d805..d56d9363d4b30f3cfdfe57bc4d1b7b75189ea32b 100644 (file)
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -2981,30 +2981,6 @@ int cgroup_task_count(const struct cgroup *cgrp)
        return count;
 }
 
-/*
- * Advance a list_head iterator.  The iterator should be positioned at
- * the start of a css_set
- */
-static void cgroup_advance_iter(struct cgroup *cgrp, struct cgroup_iter *it)
-{
-       struct list_head *l = it->cset_link;
-       struct cgrp_cset_link *link;
-       struct css_set *cset;
-
-       /* Advance to the next non-empty css_set */
-       do {
-               l = l->next;
-               if (l == &cgrp->cset_links) {
-                       it->cset_link = NULL;
-                       return;
-               }
-               link = list_entry(l, struct cgrp_cset_link, cset_link);
-               cset = link->cset;
-       } while (list_empty(&cset->tasks));
-       it->cset_link = l;
-       it->task = cset->tasks.next;
-}
-
 /*
  * To reduce the fork() overhead for systems that are not actually
  * using their cgroups capability, we don't maintain the lists running
@@ -3223,6 +3199,30 @@ css_next_descendant_post(struct cgroup_subsys_state *pos,
 }
 EXPORT_SYMBOL_GPL(css_next_descendant_post);
 
+/*
+ * Advance a list_head iterator.  The iterator should be positioned at
+ * the start of a css_set
+ */
+static void cgroup_advance_iter(struct cgroup *cgrp, struct cgroup_iter *it)
+{
+       struct list_head *l = it->cset_link;
+       struct cgrp_cset_link *link;
+       struct css_set *cset;
+
+       /* Advance to the next non-empty css_set */
+       do {
+               l = l->next;
+               if (l == &cgrp->cset_links) {
+                       it->cset_link = NULL;
+                       return;
+               }
+               link = list_entry(l, struct cgrp_cset_link, cset_link);
+               cset = link->cset;
+       } while (list_empty(&cset->tasks));
+       it->cset_link = l;
+       it->task = cset->tasks.next;
+}
+
 void cgroup_iter_start(struct cgroup *cgrp, struct cgroup_iter *it)
        __acquires(css_set_lock)
 {