[PATCH v3 06/13] mm/huge_memory: remove unnecessary VM_BUG_ON_PAGE()

[Lorenzo Stoakes (Oracle)]

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.

Reviewed-by: Baolin Wang <baolin.wang@xxxxxxxxxxxxxxxxx>
Signed-off-by: Lorenzo Stoakes (Oracle) <ljs@xxxxxxxxxx>
---
 mm/huge_memory.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index b9d9acfef147..4add863cd18f 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -2375,7 +2375,6 @@ 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