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
find_linux_pte(pgd_t * pgdir,unsigned long ea,bool * is_thp,unsigned * hshift)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
find_init_mm_pte(unsigned long ea,unsigned * hshift)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 */
find_current_mm_pte(pgd_t * pgdir,unsigned long ea,bool * is_thp,unsigned * hshift)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 */
36
