mm/memcontrol: remove redundant NULL check
Fix below warnings reported by coccicheck: mm/memcontrol.c:451:3-9: WARNING: NULL check before some freeing functions is not needed. Link: https://lkml.kernel.org/r/1611216029-34397-1-git-send-email-abaci-bugfix@linux.alibaba.com Signed-off-by: Yang Li <abaci-bugfix@linux.alibaba.com> Reported-by: Abaci Robot <abaci@linux.alibaba.com> Reviewed-by: Andrew Morton <akpm@linux-foundation.org> Reviewed-by: David Hildenbrand <david@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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@ -452,8 +452,7 @@ static void memcg_free_shrinker_maps(struct mem_cgroup *memcg)
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for_each_node(nid) {
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pn = mem_cgroup_nodeinfo(memcg, nid);
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map = rcu_dereference_protected(pn->shrinker_map, true);
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if (map)
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kvfree(map);
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kvfree(map);
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rcu_assign_pointer(pn->shrinker_map, NULL);
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}
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}
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