[PATCH v2 6/9] mm/huge_memory: remove unnecessary VM_BUG_ON_PAGE()

Lorenzo Stoakes (Oracle)
2026-03-19T13:00:40Z

This has been around since the beginnings of the THP implementation. I
think we can safely assume that, if we have a THP folio, it will have a
head page.

Signed-off-by: Lorenzo Stoakes (Oracle) <ljs@kernel.org>
---
mm/huge_memory.c | 1 -
1 file changed, 1 deletion(-)

diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index c84b30461cc5..499c31bf8f83 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -2468,7 +2468,6 @@ bool zap_huge_pmd(struct mmu_gather *tlb, struct vm_area_struct *vma,
folio = page_folio(page);
folio_remove_rmap_pmd(folio, page, vma);
WARN_ON_ONCE(folio_mapcount(folio) < 0);
- VM_BUG_ON_PAGE(!PageHead(page), page);
} else if (pmd_is_valid_softleaf(orig_pmd)) {
const softleaf_t entry = softleaf_from_pmd(orig_pmd);

--
2.53.0