diff options
| -rw-r--r-- | include/asm-x86_64/pgtable.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/include/asm-x86_64/pgtable.h b/include/asm-x86_64/pgtable.h index a1ada852f00..5e0f2fdab0d 100644 --- a/include/asm-x86_64/pgtable.h +++ b/include/asm-x86_64/pgtable.h @@ -104,6 +104,19 @@ extern inline void pgd_clear (pgd_t * pgd) ((unsigned long) __va(pud_val(pud) & PHYSICAL_PAGE_MASK)) #define ptep_get_and_clear(mm,addr,xp) __pte(xchg(&(xp)->pte, 0)) + +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; +} + #define pte_same(a, b) ((a).pte == (b).pte) #define PMD_SIZE (1UL << PMD_SHIFT) @@ -434,6 +447,7 @@ extern int kern_addr_valid(unsigned long addr); #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> |