diff options
| author | Peter Xu | 2022-05-12 20:22:54 -0700 |
|---|---|---|
| committer | Andrew Morton | 2022-05-13 07:20:10 -0700 |
| commit | 229f3fa778c50edf12b34bd91b2025645a11bb94 (patch) | |
| tree | d765fb981e1917d86d0247a2a0760d53479d6aaf /arch | |
| parent | c56d1b62cce83695823c13e52f73e92eb568c0c1 (diff) | |
mm/hugetlb: introduce huge pte version of uffd-wp helpers
They will be used in the follow up patches to either check/set/clear
uffd-wp bit of a huge pte.
So far it reuses all the small pte helpers. Archs can overwrite these
versions when necessary (with __HAVE_ARCH_HUGE_PTE_UFFD_WP* macros) in the
future.
Link: https://lkml.kernel.org/r/20220405014858.14531-1-peterx@redhat.com
Signed-off-by: Peter Xu <peterx@redhat.com>
Cc: Alistair Popple <apopple@nvidia.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Axel Rasmussen <axelrasmussen@google.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Jerome Glisse <jglisse@redhat.com>
Cc: "Kirill A . Shutemov" <kirill@shutemov.name>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Mike Rapoport <rppt@linux.vnet.ibm.com>
Cc: Nadav Amit <nadav.amit@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/s390/include/asm/hugetlb.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/arch/s390/include/asm/hugetlb.h b/arch/s390/include/asm/hugetlb.h index f0bc4d31e852..32c3fd6e878e 100644 --- a/arch/s390/include/asm/hugetlb.h +++ b/arch/s390/include/asm/hugetlb.h @@ -120,6 +120,21 @@ static inline pte_t huge_pte_modify(pte_t pte, pgprot_t newprot) return pte_modify(pte, newprot); } +static inline pte_t huge_pte_mkuffd_wp(pte_t pte) +{ + return pte; +} + +static inline pte_t huge_pte_clear_uffd_wp(pte_t pte) +{ + return pte; +} + +static inline int huge_pte_uffd_wp(pte_t pte) +{ + return 0; +} + static inline bool gigantic_page_runtime_supported(void) { return true; |