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| author | Dan Williams <dan.j.williams@intel.com> | 2017-11-30 01:10:21 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-11-30 03:40:42 +0100 |
| commit | 5c9d2d5c269c498aa9a546e8d2158a3e4142a1a2 (patch) | |
| tree | b8454bda3e8830a40159b89b2d8cdf3412d0ac25 /mm/readahead.c | |
| parent | mm: replace pmd_write with pmd_access_permitted in fault + gup paths (diff) | |
| download | linux-5c9d2d5c269c498aa9a546e8d2158a3e4142a1a2.tar.xz linux-5c9d2d5c269c498aa9a546e8d2158a3e4142a1a2.zip | |
mm: replace pte_write with pte_access_permitted in fault + gup paths
The 'access_permitted' helper is used in the gup-fast path and goes
beyond the simple _PAGE_RW check to also:
- validate that the mapping is writable from a protection keys
standpoint
- validate that the pte has _PAGE_USER set since all fault paths where
pte_write is must be referencing user-memory.
Link: http://lkml.kernel.org/r/151043111604.2842.8051684481794973100.stgit@dwillia2-desk3.amr.corp.intel.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: "Jérôme Glisse" <jglisse@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/readahead.c')
0 files changed, 0 insertions, 0 deletions