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[12/18] Additional macros for pmd operations

Message ID 1329402705-25454-12-git-send-email-mail@smogura.eu
State Not Applicable, archived
Headers show

Commit Message

Radosław Smogura Feb. 16, 2012, 2:31 p.m. UTC 
Macros for operating on pmd in simillar way like for pte.

Signed-off-by: Radosław Smogura <mail@smogura.eu>
---
 arch/x86/include/asm/pgtable.h |   21 +++++++++++++++++++++
 1 files changed, 21 insertions(+), 0 deletions(-)
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Patch

diff --git a/arch/x86/include/asm/pgtable.h b/arch/x86/include/asm/pgtable.h
index 49afb3f..38fd008 100644
--- a/arch/x86/include/asm/pgtable.h
+++ b/arch/x86/include/asm/pgtable.h
@@ -265,6 +265,11 @@  static inline pmd_t pmd_wrprotect(pmd_t pmd)
 	return pmd_clear_flags(pmd, _PAGE_RW);
 }
 
+static inline int pmd_dirty(pmd_t pmd)
+{
+	return pmd_flags(pmd) & _PAGE_DIRTY;
+}
+
 static inline pmd_t pmd_mkdirty(pmd_t pmd)
 {
 	return pmd_set_flags(pmd, _PAGE_DIRTY);
@@ -285,6 +290,11 @@  static inline pmd_t pmd_mkwrite(pmd_t pmd)
 	return pmd_set_flags(pmd, _PAGE_RW);
 }
 
+static inline pmd_t pmd_writeprotect(pmd_t pmd)
+{
+	return pmd_clear_flags(pmd, _PAGE_RW);
+}
+
 static inline pmd_t pmd_mknotpresent(pmd_t pmd)
 {
 	return pmd_clear_flags(pmd, _PAGE_PRESENT);
@@ -731,6 +741,17 @@  static inline int pmd_write(pmd_t pmd)
 	return pmd_flags(pmd) & _PAGE_RW;
 }
 
+#define __HAVE_ARCH_PMD_EXEC
+static inline int pmd_exec(pmd_t pmd)
+{
+	return !(pmd_flags(pmd) & _PAGE_NX);
+}
+
+static inline void pmd_mkexec(pmd_t pmd)
+{
+	pmd_clear_flags(pmd, _PAGE_NX);
+}
+
 #define __HAVE_ARCH_PMDP_GET_AND_CLEAR
 static inline pmd_t pmdp_get_and_clear(struct mm_struct *mm, unsigned long addr,
 				       pmd_t *pmdp)