Merge tag 'for-5.13-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave...
[platform/kernel/linux-starfive.git] / mm / pgalloc-track.h
1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _LINUX_PGALLOC_TRACK_H
3 #define _LINUX_PGALLOC_TRACK_H
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
51 #endif /* _LINUX_PGALLOC_TRACK_H */