The quilt patch titled
Subject: mm/pagemap: recognize uffd-wp bit for shmem/hugetlbfs
has been removed from the -mm tree. Its filename was
mm-pagemap-recognize-uffd-wp-bit-for-shmem-hugetlbfs.patch
This patch was dropped because it was merged into the mm-stable branch\nof git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
------------------------------------------------------
From: Peter Xu <peterx@xxxxxxxxxx>
Subject: mm/pagemap: recognize uffd-wp bit for shmem/hugetlbfs
This requires the pagemap code to be able to recognize the newly
introduced swap special pte for uffd-wp, meanwhile the general case for
hugetlb that we recently start to support. It should make pagemap uffd-wp
support complete.
Link: https://lkml.kernel.org/r/20220405014923.15047-1-peterx@xxxxxxxxxx
Signed-off-by: Peter Xu <peterx@xxxxxxxxxx>
Cc: Alistair Popple <apopple@xxxxxxxxxx>
Cc: Andrea Arcangeli <aarcange@xxxxxxxxxx>
Cc: Axel Rasmussen <axelrasmussen@xxxxxxxxxx>
Cc: David Hildenbrand <david@xxxxxxxxxx>
Cc: Hugh Dickins <hughd@xxxxxxxxxx>
Cc: Jerome Glisse <jglisse@xxxxxxxxxx>
Cc: "Kirill A . Shutemov" <kirill@xxxxxxxxxxxxx>
Cc: Matthew Wilcox <willy@xxxxxxxxxxxxx>
Cc: Mike Kravetz <mike.kravetz@xxxxxxxxxx>
Cc: Mike Rapoport <rppt@xxxxxxxxxxxxxxxxxx>
Cc: Nadav Amit <nadav.amit@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/proc/task_mmu.c | 7 +++++++
1 file changed, 7 insertions(+)
--- a/fs/proc/task_mmu.c~mm-pagemap-recognize-uffd-wp-bit-for-shmem-hugetlbfs
+++ a/fs/proc/task_mmu.c
@@ -1421,6 +1421,8 @@ static pagemap_entry_t pte_to_pagemap_en
migration = is_migration_entry(entry);
if (is_pfn_swap_entry(entry))
page = pfn_swap_entry_to_page(entry);
+ if (pte_marker_entry_uffd_wp(entry))
+ flags |= PM_UFFD_WP;
}
if (page && !PageAnon(page))
@@ -1556,10 +1558,15 @@ static int pagemap_hugetlb_range(pte_t *
if (page_mapcount(page) == 1)
flags |= PM_MMAP_EXCLUSIVE;
+ if (huge_pte_uffd_wp(pte))
+ flags |= PM_UFFD_WP;
+
flags |= PM_PRESENT;
if (pm->show_pfn)
frame = pte_pfn(pte) +
((addr & ~hmask) >> PAGE_SHIFT);
+ } else if (pte_swp_uffd_wp_any(pte)) {
+ flags |= PM_UFFD_WP;
}
for (; addr != end; addr += PAGE_SIZE) {
_
Patches currently in -mm which might be from peterx@xxxxxxxxxx are
