mm/hugetlb: use a folio in hugetlb_wp()

We can replace nine implict calls to compound_head() with one by using
old_folio.  The page we get back is always a head page, so we just convert
old_page to old_folio.

Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: ZhangPeng <[email protected]>
Suggested-by: Matthew Wilcox (Oracle) <[email protected]>
Reviewed-by: Matthew Wilcox (Oracle) <[email protected]>
Reviewed-by: Muchun Song <[email protected]>
Reviewed-by: Sidhartha Kumar <[email protected]>
Cc: Kefeng Wang <[email protected]>
Cc: Mike Kravetz <[email protected]>
Cc: Nanyong Sun <[email protected]>
Cc: Vishal Moola (Oracle) <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>

0 files changed, 0 insertions, 0 deletions