From 7bfb72e847c201fe32271fb13f75d060671d8890 Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Mon, 4 Feb 2008 16:48:08 +0100 Subject: [PATCH] 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 Signed-off-by: Ingo Molnar --- arch/x86/mm/pageattr.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/mm/pageattr.c b/arch/x86/mm/pageattr.c index 0b029c97174e..9be684e61dcb 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); } } -- GitLab