x86: cpa, fix lookup_address

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lookup_address() returns a wrong level and a wrong pointer to a non
existing pte, when pmd or pud entries are marked !present. This
happens for example due to boot time mapping of GART into the low
memory space.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

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Thomas Gleixner 2008-02-04 16:48:07 +01:00 • committed by Ingo Molnar

parent 34508f66b6

commit 9a14aefc1d

1 changed files with 9 additions and 1 deletions

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arch/x86/mm/pageattr.c

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