projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 2a681cfa | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| f0953a1b IM |
2 | #ifndef _LINUX_PGALLOC_TRACK_H |
| 3 | #define _LINUX_PGALLOC_TRACK_H | |
| 2a681cfa JR |
4 | |
| 5 | #if defined(CONFIG_MMU) | |
| 6 | static inline p4d_t *p4d_alloc_track(struct mm_struct *mm, pgd_t *pgd, | |
| 7 | unsigned long address, | |
| 8 | pgtbl_mod_mask *mod_mask) | |
| 9 | { | |
| 10 | if (unlikely(pgd_none(*pgd))) { | |
| 11 | if (__p4d_alloc(mm, pgd, address)) | |
| 12 | return NULL; | |
| 13 | *mod_mask |= PGTBL_PGD_MODIFIED; | |
| 14 | } | |
| 15 | ||
| 16 | return p4d_offset(pgd, address); | |
| 17 | } | |
| 18 | ||
| 19 | static inline pud_t *pud_alloc_track(struct mm_struct *mm, p4d_t *p4d, | |
| 20 | unsigned long address, | |
| 21 | pgtbl_mod_mask *mod_mask) | |
| 22 | { | |
| 23 | if (unlikely(p4d_none(*p4d))) { | |
| 24 | if (__pud_alloc(mm, p4d, address)) | |
| 25 | return NULL; | |
| 26 | *mod_mask |= PGTBL_P4D_MODIFIED; | |
| 27 | } | |
| 28 | ||
| 29 | return pud_offset(p4d, address); | |
| 30 | } | |
| 31 | ||
| 32 | static inline pmd_t *pmd_alloc_track(struct mm_struct *mm, pud_t *pud, | |
| 33 | unsigned long address, | |
| 34 | pgtbl_mod_mask *mod_mask) | |
| 35 | { | |
| 36 | if (unlikely(pud_none(*pud))) { | |
| 37 | if (__pmd_alloc(mm, pud, address)) | |
| 38 | return NULL; | |
| 39 | *mod_mask |= PGTBL_PUD_MODIFIED; | |
| 40 | } | |
| 41 | ||
| 42 | return pmd_offset(pud, address); | |
| 43 | } | |
| 44 | #endif /* CONFIG_MMU */ | |
| 45 | ||
| 46 | #define pte_alloc_kernel_track(pmd, address, mask) \ | |
| 47 | ((unlikely(pmd_none(*(pmd))) && \ | |
| 48 | (__pte_alloc_kernel(pmd) || ({*(mask)|=PGTBL_PMD_MODIFIED;0;})))?\ | |
| 49 | NULL: pte_offset_kernel(pmd, address)) | |
| 50 | ||
| f0953a1b | 51 | #endif /* _LINUX_PGALLOC_TRACK_H */ |