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| author | Steve Capper <steve.capper@linaro.org> | 2013-05-17 12:32:55 +0100 |
|---|---|---|
| committer | Christoffer Dall <christoffer.dall@linaro.org> | 2014-10-02 20:24:58 +0200 |
| commit | 6ea0cfc5fd25e82d2bdb101cff47c86c30200927 (patch) | |
| tree | a256169d239a186e9522525eb36de4b64aa68abf /arch/arm/mm/dma-mapping.c | |
| parent | 8bb495e3f02401ee6f76d1b1d77f3ac9f079e376 (diff) | |
ARM: mm: correct pte_same behaviour for LPAE.
For 3 levels of paging the PTE_EXT_NG bit will be set for user
address ptes that are written to a page table but not for ptes
created with mk_pte.
This can cause some comparison tests made by pte_same to fail
spuriously and lead to other problems.
To correct this behaviour, we mask off PTE_EXT_NG for any pte that
is present before running the comparison.
Signed-off-by: Steve Capper <steve.capper@linaro.org>
Reviewed-by: Will Deacon <will.deacon@arm.com>
(cherry picked from commit dde1b65110353517816bcbc58539463396202244)
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
Diffstat (limited to 'arch/arm/mm/dma-mapping.c')
0 files changed, 0 insertions, 0 deletions