fs: use kmem_cache_zalloc instead
[pv_ops_mirror.git] / include / asm-sh / pgalloc.h
blob18b613c57cf5118a8ea6fc452d0a0230ff4d50bf
1 #ifndef __ASM_SH_PGALLOC_H
2 #define __ASM_SH_PGALLOC_H
4 #include <linux/quicklist.h>
5 #include <asm/page.h>
7 #define QUICK_PGD 0 /* We preserve special mappings over free */
8 #define QUICK_PT 1 /* Other page table pages that are zero on free */
10 static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd,
11 pte_t *pte)
13 set_pmd(pmd, __pmd((unsigned long)pte));
16 static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
17 struct page *pte)
19 set_pmd(pmd, __pmd((unsigned long)page_address(pte)));
22 static inline void pgd_ctor(void *x)
24 pgd_t *pgd = x;
26 memcpy(pgd + USER_PTRS_PER_PGD,
27 swapper_pg_dir + USER_PTRS_PER_PGD,
28 (PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t));
32 * Allocate and free page tables.
34 static inline pgd_t *pgd_alloc(struct mm_struct *mm)
36 return quicklist_alloc(QUICK_PGD, GFP_KERNEL | __GFP_REPEAT, pgd_ctor);
39 static inline void pgd_free(pgd_t *pgd)
41 quicklist_free(QUICK_PGD, NULL, pgd);
44 static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
45 unsigned long address)
47 return quicklist_alloc(QUICK_PT, GFP_KERNEL | __GFP_REPEAT, NULL);
50 static inline struct page *pte_alloc_one(struct mm_struct *mm,
51 unsigned long address)
53 void *pg = quicklist_alloc(QUICK_PT, GFP_KERNEL | __GFP_REPEAT, NULL);
54 return pg ? virt_to_page(pg) : NULL;
57 static inline void pte_free_kernel(pte_t *pte)
59 quicklist_free(QUICK_PT, NULL, pte);
62 static inline void pte_free(struct page *pte)
64 quicklist_free_page(QUICK_PT, NULL, pte);
67 #define __pte_free_tlb(tlb,pte) tlb_remove_page((tlb),(pte))
70 * allocating and freeing a pmd is trivial: the 1-entry pmd is
71 * inside the pgd, so has no extra memory associated with it.
74 #define pmd_free(x) do { } while (0)
75 #define __pmd_free_tlb(tlb,x) do { } while (0)
77 static inline void check_pgt_cache(void)
79 quicklist_trim(QUICK_PGD, NULL, 25, 16);
80 quicklist_trim(QUICK_PT, NULL, 25, 16);
83 #endif /* __ASM_SH_PGALLOC_H */