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