diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/asm-generic/pgtable.h | 16 | ||||
| -rw-r--r-- | include/asm-i386/pgtable.h | 13 |
2 files changed, 29 insertions, 0 deletions
diff --git a/include/asm-generic/pgtable.h b/include/asm-generic/pgtable.h index f4059356517..f86c1e54946 100644 --- a/include/asm-generic/pgtable.h +++ b/include/asm-generic/pgtable.h @@ -101,6 +101,22 @@ do { \ }) #endif +#ifndef __HAVE_ARCH_PTEP_GET_AND_CLEAR_FULL +#define ptep_get_and_clear_full(__mm, __address, __ptep, __full) \ +({ \ + pte_t __pte; \ + __pte = ptep_get_and_clear((__mm), (__address), (__ptep)); \ + __pte; \ +}) +#endif + +#ifndef __HAVE_ARCH_PTE_CLEAR_FULL +#define pte_clear_full(__mm, __address, __ptep, __full) \ +do { \ + pte_clear((__mm), (__address), (__ptep)); \ +} while (0) +#endif + #ifndef __HAVE_ARCH_PTEP_CLEAR_FLUSH #define ptep_clear_flush(__vma, __address, __ptep) \ ({ \ diff --git a/include/asm-i386/pgtable.h b/include/asm-i386/pgtable.h index f51fd2c956b..d74185aee15 100644 --- a/include/asm-i386/pgtable.h +++ b/include/asm-i386/pgtable.h @@ -260,6 +260,18 @@ static inline int ptep_test_and_clear_young(struct vm_area_struct *vma, unsigned return test_and_clear_bit(_PAGE_BIT_ACCESSED, &ptep->pte_low); } +static inline pte_t ptep_get_and_clear_full(struct mm_struct *mm, unsigned long addr, pte_t *ptep, int full) +{ + pte_t pte; + if (full) { + pte = *ptep; + *ptep = __pte(0); + } else { + pte = ptep_get_and_clear(mm, addr, ptep); + } + return pte; +} + static inline void ptep_set_wrprotect(struct mm_struct *mm, unsigned long addr, pte_t *ptep) { clear_bit(_PAGE_BIT_RW, &ptep->pte_low); @@ -417,6 +429,7 @@ extern void noexec_setup(const char *str); #define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG #define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_DIRTY #define __HAVE_ARCH_PTEP_GET_AND_CLEAR +#define __HAVE_ARCH_PTEP_GET_AND_CLEAR_FULL #define __HAVE_ARCH_PTEP_SET_WRPROTECT #define __HAVE_ARCH_PTE_SAME #include <asm-generic/pgtable.h> |