From 6eade8ff461fdf13ec6780602eb5618e0bdaa972 Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Wed, 30 Jan 2008 13:34:08 +0100 Subject: [PATCH] x86: cpa: clean up change_page_attr_set/clear() Signed-off-by: Ingo Molnar Signed-off-by: Thomas Gleixner --- arch/x86/mm/pageattr.c | 17 +++++++++-------- 1 file changed, 9 insertions(+), 8 deletions(-) diff --git a/arch/x86/mm/pageattr.c b/arch/x86/mm/pageattr.c index 5cfc0d4ade56..145f5edf488a 100644 --- a/arch/x86/mm/pageattr.c +++ b/arch/x86/mm/pageattr.c @@ -312,10 +312,10 @@ static int change_page_attr_set(unsigned long addr, int numpages, for (i = 0; i < numpages ; i++) { pte = lookup_address(addr, &level); - if (pte) - current_prot = pte_pgprot(*pte); - else - pgprot_val(current_prot) = 0; + if (!pte) + return -EINVAL; + + current_prot = pte_pgprot(*pte); pgprot_val(new_prot) = pgprot_val(current_prot) | pgprot_val(prot); @@ -356,11 +356,12 @@ static int change_page_attr_clear(unsigned long addr, int numpages, int i, ret; for (i = 0; i < numpages; i++) { + pte = lookup_address(addr, &level); - if (pte) - current_prot = pte_pgprot(*pte); - else - pgprot_val(current_prot) = 0; + if (!pte) + return -EINVAL; + + current_prot = pte_pgprot(*pte); pgprot_val(new_prot) = pgprot_val(current_prot) & ~pgprot_val(prot); -- 2.20.1