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| author | Lorenzo Stoakes (Oracle) <ljs@kernel.org> | 2026-03-20 18:07:23 +0000 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2026-04-05 13:53:46 -0700 |
| commit | 07f264680ac875725ca12e6adadd9e3def2e30f2 (patch) | |
| tree | 916ccd70a3b1eef8dc0ea988bb8330ddbeb94a42 /mm | |
| parent | 7217744e0aa373dd6f0a62b0db610ff085e50153 (diff) | |
| download | lwn-07f264680ac875725ca12e6adadd9e3def2e30f2.tar.gz lwn-07f264680ac875725ca12e6adadd9e3def2e30f2.zip | |
mm/huge_memory: remove unnecessary VM_BUG_ON_PAGE()
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.
Link: https://lkml.kernel.org/r/f3fa8eb4634ccb2e78209f570cc1a769a02ce93e.1774029655.git.ljs@kernel.org
Signed-off-by: Lorenzo Stoakes (Oracle) <ljs@kernel.org>
Reviewed-by: Baolin Wang <baolin.wang@linux.alibaba.com>
Reviewed-by: Suren Baghdasaryan <surenb@google.com>
Cc: Barry Song <baohua@kernel.org>
Cc: David Hildenbrand <david@kernel.org>
Cc: Dev Jain <dev.jain@arm.com>
Cc: Lance Yang <lance.yang@linux.dev>
Cc: Liam Howlett <liam.howlett@oracle.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Nico Pache <npache@redhat.com>
Cc: Qi Zheng <zhengqi.arch@bytedance.com>
Cc: Ryan Roberts <ryan.roberts@arm.com>
Cc: Zi Yan <ziy@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/huge_memory.c | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/mm/huge_memory.c b/mm/huge_memory.c index 283685dd6d9f..f072acd5b279 100644 --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -2452,7 +2452,6 @@ 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); |