From: Lukas Bulwahn <lukas.bulwahn@xxxxxxxxx>
Subject: mm: memcg: remove obsolete memcg_has_children()
Commit 2ef1bf118c40 ("mm: memcg: deprecate the non-hierarchical mode")
removed the only use of memcg_has_children() in
mem_cgroup_hierarchy_write() as part of the feature deprecation.
Hence, since then, make CC=clang W=1 warns:
mm/memcontrol.c:3421:20:
warning: unused function 'memcg_has_children' [-Wunused-function]
Simply remove this obsolete unused function.
Link: https://lkml.kernel.org/r/20201116055043.20886-1-lukas.bulwahn@xxxxxxxxx
Signed-off-by: Lukas Bulwahn <lukas.bulwahn@xxxxxxxxx>
Acked-by: Roman Gushchin <guro@xxxxxx>
Reviewed-by: Nathan Chancellor <natechancellor@xxxxxxxxx>
Acked-by: Michal Hocko <mhocko@xxxxxxxx>
Cc: Johannes Weiner <hannes@xxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/memcontrol.c | 13 -------------
1 file changed, 13 deletions(-)
--- a/mm/memcontrol.c~mm-memcg-remove-obsolete-memcg_has_children
+++ a/mm/memcontrol.c
@@ -3454,19 +3454,6 @@ unsigned long mem_cgroup_soft_limit_recl
}
/*
- * Test whether @memcg has children, dead or alive.
- */
-static inline bool memcg_has_children(struct mem_cgroup *memcg)
-{
- bool ret;
-
- rcu_read_lock();
- ret = css_next_child(NULL, &memcg->css);
- rcu_read_unlock();
- return ret;
-}
-
-/*
* Reclaims as many pages from the given memcg as possible.
*
* Caller is responsible for holding css reference for memcg.
_
