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mm/hugetlb: remove redundant check in preparing and destroying gigantic page

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[ Upstream commit 5291c09b3edb657f23c1939750c702ba2d74932f ]

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@windriver.com
Signed-off-by: Yanfei Xu <yanfei.xu@windriver.com>
Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Yanfei Xu 2021-02-24 12:07:22 -08:00 committed by Greg Kroah-Hartman
parent 0da83a815d
commit 2e16ad5611
1 changed files with 2 additions and 5 deletions
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7
mm/hugetlb.c
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@ -1252,8 +1252,7 @@ static void destroy_compound_gigantic_page(struct page *page,
struct page *p = page + 1; struct page *p = page + 1;
atomic_set(compound_mapcount_ptr(page), 0); 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)) { for (i = 1; i < nr_pages; i++, p = mem_map_next(p, page, i)) {
clear_compound_head(p); clear_compound_head(p);
@ -1583,9 +1582,7 @@ static void prep_compound_gigantic_page(struct page *page, unsigned int order)
set_compound_head(p, page); set_compound_head(p, page);
} }
atomic_set(compound_mapcount_ptr(page), -1); atomic_set(compound_mapcount_ptr(page), -1);
atomic_set(compound_pincount_ptr(page), 0);
if (hpage_pincount_available(page))
atomic_set(compound_pincount_ptr(page), 0);
} }
/* /*