projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 2a5eacca MF |
1 | #include <linux/mm.h> |
| 2 | ||
| 3 | #define PGALLOC_GFP GFP_KERNEL | __GFP_REPEAT | __GFP_ZERO | |
| 4 | ||
| 5 | static struct kmem_cache *pgd_cachep; | |
| 6 | ||
| 7 | #ifdef CONFIG_PGTABLE_LEVELS_3 | |
| 8 | static struct kmem_cache *pmd_cachep; | |
| 9 | #endif | |
| 10 | ||
| 11 | void pgd_ctor(void *x) | |
| 12 | { | |
| 13 | pgd_t *pgd = x; | |
| 14 | ||
| 15 | memcpy(pgd + USER_PTRS_PER_PGD, | |
| 16 | swapper_pg_dir + USER_PTRS_PER_PGD, | |
| 17 | (PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t)); | |
| 18 | } | |
| 19 | ||
| 20 | void pgtable_cache_init(void) | |
| 21 | { | |
| 22 | pgd_cachep = kmem_cache_create("pgd_cache", | |
| 23 | PTRS_PER_PGD * (1<<PTE_MAGNITUDE), | |
| 24 | PAGE_SIZE, SLAB_PANIC, pgd_ctor); | |
| 25 | #ifdef CONFIG_PGTABLE_LEVELS_3 | |
| 26 | pmd_cachep = kmem_cache_create("pmd_cache", | |
| 27 | PTRS_PER_PMD * (1<<PTE_MAGNITUDE), | |
| 28 | PAGE_SIZE, SLAB_PANIC, NULL); | |
| 29 | #endif | |
| 30 | } | |
| 31 | ||
| 32 | pgd_t *pgd_alloc(struct mm_struct *mm) | |
| 33 | { | |
| 34 | return kmem_cache_alloc(pgd_cachep, PGALLOC_GFP); | |
| 35 | } | |
| 36 | ||
| 37 | void pgd_free(struct mm_struct *mm, pgd_t *pgd) | |
| 38 | { | |
| 39 | kmem_cache_free(pgd_cachep, pgd); | |
| 40 | } | |
| 41 | ||
| 42 | #ifdef CONFIG_PGTABLE_LEVELS_3 | |
| 43 | void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd) | |
| 44 | { | |
| 45 | set_pud(pud, __pud((unsigned long)pmd)); | |
| 46 | } | |
| 47 | ||
| 48 | pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address) | |
| 49 | { | |
| 50 | return kmem_cache_alloc(pmd_cachep, PGALLOC_GFP); | |
| 51 | } | |
| 52 | ||
| 53 | void pmd_free(struct mm_struct *mm, pmd_t *pmd) | |
| 54 | { | |
| 55 | kmem_cache_free(pmd_cachep, pmd); | |
| 56 | } | |
| 57 | #endif /* CONFIG_PGTABLE_LEVELS_3 */ |