From: Zi Yan <zi.yan@xxxxxxxxxxxxxx> Subject: mm: remove unnecessary WARN_ONCE in page_vma_mapped_walk(). A non present pmd entry can appear after pmd_lock is taken in page_vma_mapped_walk(), even if THP migration is not enabled. The WARN_ONCE is unnecessary. Link: http://lkml.kernel.org/r/20171003142606.12324-1-zi.yan@xxxxxxxx Fixes: 616b8371539a ("mm: thp: enable thp migration in generic path") Signed-off-by: Zi Yan <zi.yan@xxxxxxxxxxxxxx> Reported-by: Abdul Haleem <abdhalee@xxxxxxxxxxxxxxxxxx> Tested-by: Abdul Haleem <abdhalee@xxxxxxxxxxxxxxxxxx> Acked-by: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx> Cc: Anshuman Khandual <khandual@xxxxxxxxxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- mm/page_vma_mapped.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff -puN mm/page_vma_mapped.c~mm-remove-unnecessary-warn_once-in-page_vma_mapped_walk mm/page_vma_mapped.c --- a/mm/page_vma_mapped.c~mm-remove-unnecessary-warn_once-in-page_vma_mapped_walk +++ a/mm/page_vma_mapped.c @@ -167,8 +167,7 @@ restart: return not_found(pvmw); return true; } - } else - WARN_ONCE(1, "Non present huge pmd without pmd migration enabled!"); + } return not_found(pvmw); } else { /* THP pmd was split under us: handle on pte level */ _ -- To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
