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| author | Catalin Marinas <catalin.marinas@arm.com> | 2013-11-27 16:59:27 +0000 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2013-11-29 15:22:59 +0000 |
| commit | 3676f9ef5481d614f8c5c857f5319755be248268 (patch) | |
| tree | c125b42a392111d30c7c795b055063b23d806663 /drivers | |
| parent | 4f00130b70e5eee813cc7bc298e0f3fdf79673cc (diff) | |
| download | blackbird-op-linux-3676f9ef5481d614f8c5c857f5319755be248268.tar.gz blackbird-op-linux-3676f9ef5481d614f8c5c857f5319755be248268.zip | |
arm64: Move PTE_PROT_NONE higher up
PTE_PROT_NONE means that a pte is present but does not have any
read/write attributes. However, setting the memory type like
pgprot_writecombine() is allowed and such bits overlap with
PTE_PROT_NONE. This causes mmap/munmap issues in drivers that change the
vma->vm_pg_prot on PROT_NONE mappings.
This patch reverts the PTE_FILE/PTE_PROT_NONE shift in commit
59911ca4325d (ARM64: mm: Move PTE_PROT_NONE bit) and moves PTE_PROT_NONE
together with the other software bits.
Signed-off-by: Steve Capper <steve.capper@linaro.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Tested-by: Steve Capper <steve.capper@linaro.org>
Cc: <stable@vger.kernel.org> # 3.11+
Diffstat (limited to 'drivers')
0 files changed, 0 insertions, 0 deletions
