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authorThomas Gleixner <tglx@linutronix.de>2008-02-04 16:48:08 +0100
committerIngo Molnar <mingo@elte.hu>2008-02-04 16:48:08 +0100
commit7bfb72e847c201fe32271fb13f75d060671d8890 (patch)
treec00cf13f19c508548819c249c068d043d692213a /arch/x86
parent6ce9fc17d913ae51f8434d2826f306347820b07d (diff)
downloadop-kernel-dev-7bfb72e847c201fe32271fb13f75d060671d8890.zip
op-kernel-dev-7bfb72e847c201fe32271fb13f75d060671d8890.tar.gz
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>
Diffstat (limited to 'arch/x86')
-rw-r--r--arch/x86/mm/pageattr.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/mm/pageattr.c b/arch/x86/mm/pageattr.c
index 0b029c9..9be684e 100644
--- 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);
}
}
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