Will Deacon a6fadf7e67 arm64: mm: introduce present, faulting entries for PAGE_NONE ... This is mostly a port of dbf62d5006 ("ARM: mm: introduce L_PTE_VALID for page table entries") and 26ffd0d43b ("ARM: mm: introduce present, faulting entries for PAGE_NONE") from ARM, which makes use of present, faulting page table entries for page table entries mapped as PROT_NONE. The main difference with this implementation is that we can make use of the two pte type bits in order to avoid allocating a software bit for identifying PROT_NONE pages, instead reserving the 10b suffix for these types of mappings. This is required to prevent users from accessing such pages via syscalls such as read/write over a pipe. Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>		2013-01-10 10:48:48 +00:00
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asm	arm64: mm: introduce present, faulting entries for PAGE_NONE	2013-01-10 10:48:48 +00:00
uapi/asm	arm64: ptrace: make structure padding explicit for debug registers	2012-10-18 20:15:31 +01:00