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authorSteve Capper <steve.capper@linaro.org>2013-04-19 15:49:31 +0100
committerCatalin Marinas <catalin.marinas@arm.com>2013-04-25 17:45:52 +0100
commit4339e3f389081ea90e230a785bdbe10eccd02b71 (patch)
treecce5405ebcbdf63dd88da82e94b31afb606293a2 /arch/arm64/boot
parentarm64: Fix compat types affecting struct compat_stat (diff)
downloadlinux-dev-4339e3f389081ea90e230a785bdbe10eccd02b71.tar.xz
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arm64: mm: Correct show_pte behaviour
show_pte makes use of the *_none_or_clear_bad style functions. If a pgd, pud or pmd is identified as being bad, it will then be cleared. As show_pte appears to be called from either the user or kernel fault handlers this side effect can lead to unpredictable behaviour; especially as TLB entries are not invalidated. This patch removes the page table sanitisation from show_pte. If a bad pgd, pud or pmd is encountered it is left unmodified. Signed-off-by: Steve Capper <steve.capper@linaro.org> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/arm64/boot')
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