[PATCH 10/13] mm/gup: Merge pXd huge mapping checks
From: peterx@redhat.com
Date: 2024-03-13 21:47:40
Also in:
linux-arm-kernel, linux-mm, lkml, sparclinux
Subsystem:
memory management, memory management - gup (get user pages), the rest · Maintainers:
Andrew Morton, David Hildenbrand, Linus Torvalds
From: Peter Xu <peterx@redhat.com> Huge mapping checks in GUP are slightly redundant and can be simplified. pXd_huge() now is the same as pXd_leaf(). pmd_trans_huge() and pXd_devmap() should both imply pXd_leaf(). Time to merge them into one. Reviewed-by: Jason Gunthorpe <jgg@nvidia.com> Signed-off-by: Peter Xu <peterx@redhat.com> --- mm/gup.c | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-)
diff --git a/mm/gup.c b/mm/gup.c
index 802987281b2f..e2415e9789bc 100644
--- a/mm/gup.c
+++ b/mm/gup.c@@ -3005,8 +3005,7 @@ static int gup_pmd_range(pud_t *pudp, pud_t pud, unsigned long addr, unsigned lo if (!pmd_present(pmd)) return 0; - if (unlikely(pmd_trans_huge(pmd) || pmd_huge(pmd) || - pmd_devmap(pmd))) { + if (unlikely(pmd_leaf(pmd))) { /* See gup_pte_range() */ if (pmd_protnone(pmd)) return 0;
@@ -3043,7 +3042,7 @@ static int gup_pud_range(p4d_t *p4dp, p4d_t p4d, unsigned long addr, unsigned lo next = pud_addr_end(addr, end); if (unlikely(!pud_present(pud))) return 0; - if (unlikely(pud_huge(pud) || pud_devmap(pud))) { + if (unlikely(pud_leaf(pud))) { if (!gup_huge_pud(pud, pudp, addr, next, flags, pages, nr)) return 0;
@@ -3096,7 +3095,7 @@ static void gup_pgd_range(unsigned long addr, unsigned long end, next = pgd_addr_end(addr, end); if (pgd_none(pgd)) return; - if (unlikely(pgd_huge(pgd))) { + if (unlikely(pgd_leaf(pgd))) { if (!gup_huge_pgd(pgd, pgdp, addr, next, flags, pages, nr)) return;
--
2.44.0