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authorIngo Molnar <mingo@elte.hu>2008-03-03 09:53:17 +0100
committerIngo Molnar <mingo@elte.hu>2008-04-17 17:40:52 +0200
commit9fc34113f6880b215cbea4e7017fc818700384c2 (patch)
tree588ae8053ae866cac9dc174b3bf403a7ebe44365 /include/asm-x86/pgtable_32.h
parent40869cd038a0ecb867a7227aba46806224e4d11d (diff)
downloadop-kernel-dev-9fc34113f6880b215cbea4e7017fc818700384c2.zip
op-kernel-dev-9fc34113f6880b215cbea4e7017fc818700384c2.tar.gz
x86: debug pmd_bad()
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include/asm-x86/pgtable_32.h')
-rw-r--r--include/asm-x86/pgtable_32.h6
1 files changed, 5 insertions, 1 deletions
diff --git a/include/asm-x86/pgtable_32.h b/include/asm-x86/pgtable_32.h
index 997c36c..1e2c0d8 100644
--- a/include/asm-x86/pgtable_32.h
+++ b/include/asm-x86/pgtable_32.h
@@ -90,7 +90,11 @@ extern unsigned long pg0[];
/* To avoid harmful races, pmd_none(x) should check only the lower when PAE */
#define pmd_none(x) (!(unsigned long)pmd_val(x))
#define pmd_present(x) (pmd_val(x) & _PAGE_PRESENT)
-#define pmd_bad(x) ((pmd_val(x) \
+
+extern int pmd_bad(pmd_t pmd);
+
+#define pmd_bad_v1(x) ((pmd_val(x) & (~PAGE_MASK & ~_PAGE_USER)) != _KERNPG_TABLE)
+#define pmd_bad_v2(x) ((pmd_val(x) \
& ~(PAGE_MASK | _PAGE_USER | _PAGE_PSE | _PAGE_NX)) \
!= _KERNPG_TABLE)
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