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authorAndi Kleen <ak@suse.de>2008-02-04 16:48:09 +0100
committerIngo Molnar <mingo@elte.hu>2008-02-04 16:48:09 +0100
commitc2f71ee2140b2a506735ff9fcb7e3b1dfaab8f2b (patch)
treeb765d37850cdcfb4ac5b216935c04a5f85c0e960 /arch/x86
parent61e19a347ad4bcdda615ef77ef9c3e656e254f3d (diff)
downloadop-kernel-dev-c2f71ee2140b2a506735ff9fcb7e3b1dfaab8f2b.zip
op-kernel-dev-c2f71ee2140b2a506735ff9fcb7e3b1dfaab8f2b.tar.gz
x86: add gbpages support to lookup_address
[ tglx@linutronix.de: fix bootup crash on sparse mappings. ] Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/x86')
-rw-r--r--arch/x86/mm/pageattr.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/x86/mm/pageattr.c b/arch/x86/mm/pageattr.c
index 9be684e..143fbaf 100644
--- a/arch/x86/mm/pageattr.c
+++ b/arch/x86/mm/pageattr.c
@@ -209,6 +209,11 @@ pte_t *lookup_address(unsigned long address, int *level)
pud = pud_offset(pgd, address);
if (pud_none(*pud))
return NULL;
+
+ *level = PG_LEVEL_1G;
+ if (pud_large(*pud) || !pud_present(*pud))
+ return (pte_t *)pud;
+
pmd = pmd_offset(pud, address);
if (pmd_none(*pmd))
return NULL;
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