diff mbox series

[v6,09/26] mm/gup: Remove redundant check for PCI P2PDMA page

Message ID 92ad193d19959e361b91eaf021a3ad81edc9f1b7.1736488799.git-series.apopple@nvidia.com (mailing list archive)
State Handled Elsewhere
Headers show
Series fs/dax: Fix ZONE_DEVICE page reference counts | expand

Commit Message

Alistair Popple Jan. 10, 2025, 6 a.m. UTC 
PCI P2PDMA pages are not mapped with pXX_devmap PTEs therefore the
check in __gup_device_huge() is redundant. Remove it

Signed-off-by: Alistair Popple <apopple@nvidia.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Dan Wiliams <dan.j.williams@intel.com>
Acked-by: David Hildenbrand <david@redhat.com>
---
 mm/gup.c | 5 -----
 1 file changed, 5 deletions(-)
diff mbox series

Patch

diff --git a/mm/gup.c b/mm/gup.c
index 2304175..9b587b5 100644
--- a/mm/gup.c
+++ b/mm/gup.c
@@ -3016,11 +3016,6 @@  static int gup_fast_devmap_leaf(unsigned long pfn, unsigned long addr,
 			break;
 		}
 
-		if (!(flags & FOLL_PCI_P2PDMA) && is_pci_p2pdma_page(page)) {
-			gup_fast_undo_dev_pagemap(nr, nr_start, flags, pages);
-			break;
-		}
-
 		folio = try_grab_folio_fast(page, 1, flags);
 		if (!folio) {
 			gup_fast_undo_dev_pagemap(nr, nr_start, flags, pages);