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2025 at 09:58:14PM +0800, Qi Zheng wrote: > From: Muchun Song > > Since the no-hierarchy mode has been deprecated after the commit: > > commit bef8620cd8e0 ("mm: memcg: deprecate the non-hierarchical mode"). > > As a result, parent_mem_cgroup() will not return NULL except when passing > the root memcg, and the root memcg cannot be offline. Hence, it's safe to > remove the check on the returned value of parent_mem_cgroup(). Remove the > corresponding dead code. > > Signed-off-by: Muchun Song > Acked-by: Roman Gushchin > Acked-by: Johannes Weiner > Signed-off-by: Qi Zheng > --- Looks good to me, Reviewed-by: Harry Yoo -- Cheers, Harry / Hyeonggon