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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.com Signed-off-by: Lukas Bulwahn <lukas.bulwahn@gmail.com> Acked-by: Roman Gushchin <guro@fb.com> Reviewed-by: Nathan Chancellor <natechancellor@gmail.com> Acked-by: Michal Hocko <mhocko@suse.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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@ -3453,19 +3453,6 @@ unsigned long mem_cgroup_soft_limit_reclaim(pg_data_t *pgdat, int order,
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return nr_reclaimed;
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}
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/*
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* Test whether @memcg has children, dead or alive.
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*/
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static inline bool memcg_has_children(struct mem_cgroup *memcg)
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{
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bool ret;
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rcu_read_lock();
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ret = css_next_child(NULL, &memcg->css);
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rcu_read_unlock();
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return ret;
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}
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/*
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* Reclaims as many pages from the given memcg as possible.
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*
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