From: Yanfei Xu <yanfei.xu@xxxxxxxxxxxxx> Subject: mm/hugetlb: remove redundant check in preparing and destroying gigantic page Gigantic page is a compound page and its order is more than 1. Thus it must be available for hpage_pincount. Let's remove the redundant check for gigantic page. Link: https://lkml.kernel.org/r/20210202112002.73170-1-yanfei.xu@xxxxxxxxxxxxx Signed-off-by: Yanfei Xu <yanfei.xu@xxxxxxxxxxxxx> Reviewed-by: Mike Kravetz <mike.kravetz@xxxxxxxxxx> Reviewed-by: David Hildenbrand <david@xxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- mm/hugetlb.c | 7 ++----- 1 file changed, 2 insertions(+), 5 deletions(-) --- a/mm/hugetlb.c~mm-hugetlb-remove-redundant-check-in-preparing-and-destroying-gigantic-page +++ a/mm/hugetlb.c @@ -1234,8 +1234,7 @@ static void destroy_compound_gigantic_pa struct page *p = page + 1; atomic_set(compound_mapcount_ptr(page), 0); - if (hpage_pincount_available(page)) - atomic_set(compound_pincount_ptr(page), 0); + atomic_set(compound_pincount_ptr(page), 0); for (i = 1; i < nr_pages; i++, p = mem_map_next(p, page, i)) { clear_compound_head(p); @@ -1563,9 +1562,7 @@ static void prep_compound_gigantic_page( set_compound_head(p, page); } atomic_set(compound_mapcount_ptr(page), -1); - - if (hpage_pincount_available(page)) - atomic_set(compound_pincount_ptr(page), 0); + atomic_set(compound_pincount_ptr(page), 0); } /* _
