fs: use kmem_cache_zalloc instead
[pv_ops_mirror.git] / include / asm-generic / pgtable-nopmd.h
blob29ff5d84d8c32d2156201ae0eeceb00a4b5ad776
1 #ifndef _PGTABLE_NOPMD_H
2 #define _PGTABLE_NOPMD_H
4 #ifndef __ASSEMBLY__
6 #include <asm-generic/pgtable-nopud.h>
8 #define __PAGETABLE_PMD_FOLDED
11 * Having the pmd type consist of a pud gets the size right, and allows
12 * us to conceptually access the pud entry that this pmd is folded into
13 * without casting.
15 typedef struct { pud_t pud; } pmd_t;
17 #define PMD_SHIFT PUD_SHIFT
18 #define PTRS_PER_PMD 1
19 #define PMD_SIZE (1UL << PMD_SHIFT)
20 #define PMD_MASK (~(PMD_SIZE-1))
23 * The "pud_xxx()" functions here are trivial for a folded two-level
24 * setup: the pmd is never bad, and a pmd always exists (as it's folded
25 * into the pud entry)
27 static inline int pud_none(pud_t pud) { return 0; }
28 static inline int pud_bad(pud_t pud) { return 0; }
29 static inline int pud_present(pud_t pud) { return 1; }
30 static inline void pud_clear(pud_t *pud) { }
31 #define pmd_ERROR(pmd) (pud_ERROR((pmd).pud))
33 #define pud_populate(mm, pmd, pte) do { } while (0)
36 * (pmds are folded into puds so this doesn't get actually called,
37 * but the define is needed for a generic inline function.)
39 #define set_pud(pudptr, pudval) set_pmd((pmd_t *)(pudptr), (pmd_t) { pudval })
41 static inline pmd_t * pmd_offset(pud_t * pud, unsigned long address)
43 return (pmd_t *)pud;
46 #define pmd_val(x) (pud_val((x).pud))
47 #define __pmd(x) ((pmd_t) { __pud(x) } )
49 #define pud_page(pud) (pmd_page((pmd_t){ pud }))
50 #define pud_page_vaddr(pud) (pmd_page_vaddr((pmd_t){ pud }))
53 * allocating and freeing a pmd is trivial: the 1-entry pmd is
54 * inside the pud, so has no extra memory associated with it.
56 #define pmd_alloc_one(mm, address) NULL
57 #define pmd_free(x) do { } while (0)
58 #define __pmd_free_tlb(tlb, x) do { } while (0)
60 #undef pmd_addr_end
61 #define pmd_addr_end(addr, end) (end)
63 #endif /* __ASSEMBLY__ */
65 #endif /* _PGTABLE_NOPMD_H */