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Move it from __folio_split() into > unmap_folio(), right before the PMD split, so both the anon and file > split helpers get the early check without repeating it. > > unmap_folio() now returns -EAGAIN if the check fails and the split > helpers propagate the error. folio_split_unmapped() drops its own > copy of the check: it works on already unmapped folios and the > definitive folio_ref_freeze() in __folio_freeze_split_anon() still > catches unexpected references. > > Signed-off-by: Kairui Song > --- > mm/huge_memory.c | 29 +++++++++++++---------------- > 1 file changed, 13 insertions(+), 16 deletions(-) > LGTM. Reviewed-by: Zi Yan --=20 Best Regards, Yan, Zi