projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 94171b19 AK |
1 | #ifndef _ASM_POWERPC_PTE_WALK_H |
| 2 | #define _ASM_POWERPC_PTE_WALK_H | |
| 3 | ||
| 4 | #include <linux/sched.h> | |
| 5 | ||
| 6 | /* Don't use this directly */ | |
| 7 | extern pte_t *__find_linux_pte(pgd_t *pgdir, unsigned long ea, | |
| 8 | bool *is_thp, unsigned *hshift); | |
| 9 | ||
| 10 | static inline pte_t *find_linux_pte(pgd_t *pgdir, unsigned long ea, | |
| 11 | bool *is_thp, unsigned *hshift) | |
| 12 | { | |
| 13 | VM_WARN(!arch_irqs_disabled(), "%s called with irq enabled\n", __func__); | |
| 14 | return __find_linux_pte(pgdir, ea, is_thp, hshift); | |
| 15 | } | |
| 16 | ||
| 17 | static inline pte_t *find_init_mm_pte(unsigned long ea, unsigned *hshift) | |
| 18 | { | |
| 19 | pgd_t *pgdir = init_mm.pgd; | |
| 20 | return __find_linux_pte(pgdir, ea, NULL, hshift); | |
| 21 | } | |
| 22 | /* | |
| 23 | * This is what we should always use. Any other lockless page table lookup needs | |
| 24 | * careful audit against THP split. | |
| 25 | */ | |
| 26 | static inline pte_t *find_current_mm_pte(pgd_t *pgdir, unsigned long ea, | |
| 27 | bool *is_thp, unsigned *hshift) | |
| 28 | { | |
| 29 | VM_WARN(!arch_irqs_disabled(), "%s called with irq enabled\n", __func__); | |
| 30 | VM_WARN(pgdir != current->mm->pgd, | |
| 31 | "%s lock less page table lookup called on wrong mm\n", __func__); | |
| 32 | return __find_linux_pte(pgdir, ea, is_thp, hshift); | |
| 33 | } | |
| 34 | ||
| 35 | #endif /* _ASM_POWERPC_PTE_WALK_H */ |