提交 fe6960cb 编写于 作者: L Lukas Bulwahn 提交者: Linus Torvalds

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@gmail.comSigned-off-by: NLukas Bulwahn <lukas.bulwahn@gmail.com>
Acked-by: NRoman Gushchin <guro@fb.com>
Reviewed-by: NNathan Chancellor <natechancellor@gmail.com>
Acked-by: NMichal Hocko <mhocko@suse.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
上级 13064781
......@@ -3453,19 +3453,6 @@ unsigned long mem_cgroup_soft_limit_reclaim(pg_data_t *pgdat, int order,
return nr_reclaimed;
}
/*
* 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.
*
......
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