summaryrefslogtreecommitdiffstats
path: root/arch/x86/mm
diff options
context:
space:
mode:
authorJan Beulich <jbeulich@novell.com>2008-09-17 16:48:17 +0100
committerIngo Molnar <mingo@elte.hu>2008-10-13 10:21:18 +0200
commit606ee44dbb72fd48beb47f171d7b9cecf6ade6dd (patch)
treef7e773665ac577a3553a1460cf73c33f1cff6162 /arch/x86/mm
parent5e72d9e4850c91b6a0f06fa803f7393b55a38aa8 (diff)
downloadop-kernel-dev-606ee44dbb72fd48beb47f171d7b9cecf6ade6dd.zip
op-kernel-dev-606ee44dbb72fd48beb47f171d7b9cecf6ade6dd.tar.gz
x86: make mm/gup.c more virtualization friendly
Since pte_flags() is much cheaper than pte_val() in some virtualized environments (namely, Xen), use the former whereever possible. Signed-off-by: Jan Beulich <jbeulich@novell.com> Cc: "Nick Piggin" <npiggin@suse.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/mm')
-rw-r--r--arch/x86/mm/gup.c10
1 files changed, 5 insertions, 5 deletions
diff --git a/arch/x86/mm/gup.c b/arch/x86/mm/gup.c
index 007bb06..4ba373c 100644
--- a/arch/x86/mm/gup.c
+++ b/arch/x86/mm/gup.c
@@ -82,7 +82,7 @@ static noinline int gup_pte_range(pmd_t pmd, unsigned long addr,
pte_t pte = gup_get_pte(ptep);
struct page *page;
- if ((pte_val(pte) & (mask | _PAGE_SPECIAL)) != mask) {
+ if ((pte_flags(pte) & (mask | _PAGE_SPECIAL)) != mask) {
pte_unmap(ptep);
return 0;
}
@@ -116,10 +116,10 @@ static noinline int gup_huge_pmd(pmd_t pmd, unsigned long addr,
mask = _PAGE_PRESENT|_PAGE_USER;
if (write)
mask |= _PAGE_RW;
- if ((pte_val(pte) & mask) != mask)
+ if ((pte_flags(pte) & mask) != mask)
return 0;
/* hugepages are never "special" */
- VM_BUG_ON(pte_val(pte) & _PAGE_SPECIAL);
+ VM_BUG_ON(pte_flags(pte) & _PAGE_SPECIAL);
VM_BUG_ON(!pfn_valid(pte_pfn(pte)));
refs = 0;
@@ -173,10 +173,10 @@ static noinline int gup_huge_pud(pud_t pud, unsigned long addr,
mask = _PAGE_PRESENT|_PAGE_USER;
if (write)
mask |= _PAGE_RW;
- if ((pte_val(pte) & mask) != mask)
+ if ((pte_flags(pte) & mask) != mask)
return 0;
/* hugepages are never "special" */
- VM_BUG_ON(pte_val(pte) & _PAGE_SPECIAL);
+ VM_BUG_ON(pte_flags(pte) & _PAGE_SPECIAL);
VM_BUG_ON(!pfn_valid(pte_pfn(pte)));
refs = 0;
OpenPOWER on IntegriCloud