diff options
| author | Steve Capper <steve.capper@linaro.org> | 2013-05-17 12:32:55 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-02-05 22:35:38 -0800 |
| commit | 171b1455b3f59346412848703a41a9a8019c99c9 (patch) | |
| tree | acfed073a7c95d3d8c9ba4213a8a3b3da723c897 /arch/microblaze/kernel/dma.c | |
| parent | 30e2adb098750046be48eb595a7c6732a4293d54 (diff) | |
ARM: mm: correct pte_same behaviour for LPAE.
commit dde1b65110353517816bcbc58539463396202244 upstream.
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>
Cc: Hou Pengyang <houpengyang@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch/microblaze/kernel/dma.c')
0 files changed, 0 insertions, 0 deletions