The commit is pushed to "branch-rh8-4.18.0-80.1.2.vz8.3.x-ovz" and will appear
at https://src.openvz.org/scm/ovz/vzkernel.git
after rh8-4.18.0-80.1.2.vz8.3.6
------>
commit cbb69eef0aa54e12c8ce122f44c59476d6f67b9f
Author: Peter Xu <pet...@redhat.com>
Date: Mon Apr 20 10:34:40 2020 +0300
userfaultfd: wp: add pmd_swp_*uffd_wp() helpers
Adding these missing helpers for uffd-wp operations with pmd
swap/migration entries.
Signed-off-by: Peter Xu <pet...@redhat.com>
Signed-off-by: Andrew Morton <a...@linux-foundation.org>
Reviewed-by: Jerome Glisse <jgli...@redhat.com>
Reviewed-by: Mike Rapoport <r...@linux.vnet.ibm.com>
Cc: Andrea Arcangeli <aarca...@redhat.com>
Cc: Bobby Powers <bobbypow...@gmail.com>
Cc: Brian Geffon <bgef...@google.com>
Cc: David Hildenbrand <da...@redhat.com>
Cc: Denis Plotnikov <dplotni...@virtuozzo.com>
Cc: "Dr . David Alan Gilbert" <dgilb...@redhat.com>
Cc: Hugh Dickins <hu...@google.com>
Cc: Johannes Weiner <han...@cmpxchg.org>
Cc: "Kirill A . Shutemov" <kir...@shutemov.name>
Cc: Martin Cracauer <craca...@cons.org>
Cc: Marty McFadden <mcfadd...@llnl.gov>
Cc: Maya Gokhale <gokha...@llnl.gov>
Cc: Mel Gorman <mgor...@suse.de>
Cc: Mike Kravetz <mike.krav...@oracle.com>
Cc: Pavel Emelyanov <xe...@openvz.org>
Cc: Rik van Riel <r...@redhat.com>
Cc: Shaohua Li <s...@fb.com>
Link: http://lkml.kernel.org/r/20200220163112.11409-10-pet...@redhat.com
Signed-off-by: Linus Torvalds <torva...@linux-foundation.org>
https://jira.sw.ru/browse/PSBM-102938
(cherry picked from commit 2e3d5dc508cf001c4fb2d15515ebe6f30df88f76)
Signed-off-by: Andrey Ryabinin <aryabi...@virtuozzo.com>
---
arch/x86/include/asm/pgtable.h | 15 +++++++++++++++
include/asm-generic/pgtable_uffd.h | 15 +++++++++++++++
2 files changed, 30 insertions(+)
diff --git a/arch/x86/include/asm/pgtable.h b/arch/x86/include/asm/pgtable.h
index f01d8e82167b..f15cc996b149 100644
--- a/arch/x86/include/asm/pgtable.h
+++ b/arch/x86/include/asm/pgtable.h
@@ -1312,6 +1312,21 @@ static inline pte_t pte_swp_clear_uffd_wp(pte_t pte)
{
return pte_clear_flags(pte, _PAGE_SWP_UFFD_WP);
}
+
+static inline pmd_t pmd_swp_mkuffd_wp(pmd_t pmd)
+{
+ return pmd_set_flags(pmd, _PAGE_SWP_UFFD_WP);
+}
+
+static inline int pmd_swp_uffd_wp(pmd_t pmd)
+{
+ return pmd_flags(pmd) & _PAGE_SWP_UFFD_WP;
+}
+
+static inline pmd_t pmd_swp_clear_uffd_wp(pmd_t pmd)
+{
+ return pmd_clear_flags(pmd, _PAGE_SWP_UFFD_WP);
+}
#endif /* CONFIG_HAVE_ARCH_USERFAULTFD_WP */
#define PKRU_AD_BIT 0x1
diff --git a/include/asm-generic/pgtable_uffd.h
b/include/asm-generic/pgtable_uffd.h
index 643d1bf559c2..828966d4c281 100644
--- a/include/asm-generic/pgtable_uffd.h
+++ b/include/asm-generic/pgtable_uffd.h
@@ -46,6 +46,21 @@ static __always_inline pte_t pte_swp_clear_uffd_wp(pte_t pte)
{
return pte;
}
+
+static inline pmd_t pmd_swp_mkuffd_wp(pmd_t pmd)
+{
+ return pmd;
+}
+
+static inline int pmd_swp_uffd_wp(pmd_t pmd)
+{
+ return 0;
+}
+
+static inline pmd_t pmd_swp_clear_uffd_wp(pmd_t pmd)
+{
+ return pmd;
+}
#endif /* CONFIG_HAVE_ARCH_USERFAULTFD_WP */
#endif /* _ASM_GENERIC_PGTABLE_UFFD_H */
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