[WIP 12/18] Additional macros for pmd operations
From: Radosław Smogura <hidden>
Date: 2012-02-16 14:48:48
Also in:
linux-mm
Subsystem:
the rest, x86 architecture (32-bit and 64-bit) · Maintainers:
Linus Torvalds, Thomas Gleixner, Ingo Molnar, Borislav Petkov, Dave Hansen
Macros for operating on pmd in simillar way like for pte. Signed-off-by: Radosław Smogura <redacted> --- arch/x86/include/asm/pgtable.h | 21 +++++++++++++++++++++ 1 files changed, 21 insertions(+), 0 deletions(-)
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)
--
1.7.3.4
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