https://github.com/torvalds/linux
Revision 3676f9ef5481d614f8c5c857f5319755be248268 authored by Catalin Marinas on 27 November 2013, 16:59:27 UTC, committed by Catalin Marinas on 29 November 2013, 15:22:59 UTC
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+
1 parent 4f00130
History
Tip revision: 3676f9ef5481d614f8c5c857f5319755be248268 authored by Catalin Marinas on 27 November 2013, 16:59:27 UTC
arm64: Move PTE_PROT_NONE higher up
Tip revision: 3676f9e
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