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x86: fix page-present check in cpa_flush_range 

pte_present() might return true for PROT_NONE mappings.
Explicitely check the present bit.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Thomas Gleixner 2008-02-04 16:48:08 +01:00 committed by Ingo Molnar
parent 6ce9fc17d9
commit 7bfb72e847
1 changed files with 1 additions and 1 deletions
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2
arch/x86/mm/pageattr.c
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@ -119,7 +119,7 @@ static void cpa_flush_range(unsigned long start, int numpages, int cache)
/*
* Only flush present addresses:
*/
if (pte && pte_present(*pte))
if (pte && (pte_val(*pte) & _PAGE_PRESENT))
clflush_cache_range((void *) addr, PAGE_SIZE);
}
}