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x86: fix page-present check in cpa_flush_range
author
Thomas Gleixner
<tglx@linutronix.de>
Mon, 4 Feb 2008 15:48:08 +0000
(16:48 +0100)
committer
Ingo Molnar
<mingo@elte.hu>
Mon, 4 Feb 2008 15:48:08 +0000
(16:48 +0100)
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>
arch/x86/mm/pageattr.c
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diff --git
a/arch/x86/mm/pageattr.c
b/arch/x86/mm/pageattr.c
index
0b029c9
..
9be684e
100644
(file)
--- a/
arch/x86/mm/pageattr.c
+++ b/
arch/x86/mm/pageattr.c
@@
-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);
}
}