diff options
Diffstat (limited to 'include/asm-i386/pgtable-3level.h')
| -rw-r--r-- | include/asm-i386/pgtable-3level.h | 20 |
1 files changed, 18 insertions, 2 deletions
diff --git a/include/asm-i386/pgtable-3level.h b/include/asm-i386/pgtable-3level.h index dccb1b3337a..c2d701ea35b 100644 --- a/include/asm-i386/pgtable-3level.h +++ b/include/asm-i386/pgtable-3level.h @@ -58,7 +58,21 @@ static inline void set_pte(pte_t *ptep, pte_t pte) } #define set_pte_at(mm,addr,ptep,pteval) set_pte(ptep,pteval) -#define __HAVE_ARCH_SET_PTE_ATOMIC +/* + * Since this is only called on user PTEs, and the page fault handler + * must handle the already racy situation of simultaneous page faults, + * we are justified in merely clearing the PTE present bit, followed + * by a set. The ordering here is important. + */ +static inline void set_pte_present(struct mm_struct *mm, unsigned long addr, pte_t *ptep, pte_t pte) +{ + ptep->pte_low = 0; + smp_wmb(); + ptep->pte_high = pte.pte_high; + smp_wmb(); + ptep->pte_low = pte.pte_low; +} + #define set_pte_atomic(pteptr,pteval) \ set_64bit((unsigned long long *)(pteptr),pte_val(pteval)) #define set_pmd(pmdptr,pmdval) \ @@ -77,7 +91,7 @@ static inline void pud_clear (pud_t * pud) { } #define pud_page(pud) \ ((struct page *) __va(pud_val(pud) & PAGE_MASK)) -#define pud_page_kernel(pud) \ +#define pud_page_vaddr(pud) \ ((unsigned long) __va(pud_val(pud) & PAGE_MASK)) @@ -105,6 +119,7 @@ static inline void pmd_clear(pmd_t *pmd) *(tmp + 1) = 0; } +#define __HAVE_ARCH_PTEP_GET_AND_CLEAR static inline pte_t ptep_get_and_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep) { pte_t res; @@ -117,6 +132,7 @@ static inline pte_t ptep_get_and_clear(struct mm_struct *mm, unsigned long addr, return res; } +#define __HAVE_ARCH_PTE_SAME static inline int pte_same(pte_t a, pte_t b) { return a.pte_low == b.pte_low && a.pte_high == b.pte_high; |