diff options
| author | Dan Williams <dan.j.williams@intel.com> | 2017-11-30 01:10:14 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-11-30 03:40:42 +0100 |
| commit | e7fe7b5cae90cf85bb6fed5ec5d4c5cf311a4fe9 (patch) | |
| tree | 8019ca6ee6cd5adbe2bea8f7313c5601a2f87c7f /drivers | |
| parent | mm: switch to 'define pmd_write' instead of __HAVE_ARCH_PMD_WRITE (diff) | |
| download | linux-e7fe7b5cae90cf85bb6fed5ec5d4c5cf311a4fe9.tar.xz linux-e7fe7b5cae90cf85bb6fed5ec5d4c5cf311a4fe9.zip | |
mm: replace pud_write with pud_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
pud_write is must be referencing user-memory.
[dan.j.williams@intel.com: fix powerpc compile error]
Link: http://lkml.kernel.org/r/151129127237.37405.16073414520854722485.stgit@dwillia2-desk3.amr.corp.intel.com
Link: http://lkml.kernel.org/r/151043110453.2842.2166049702068628177.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: "David S. Miller" <davem@davemloft.net>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers')
0 files changed, 0 insertions, 0 deletions