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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 | /* * Copyright (c) 2000-2005 Silicon Graphics, Inc. * All Rights Reserved. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation. * * This program is distributed in the hope that it would be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ #ifndef __XFS_SUPPORT_KMEM_H__ #define __XFS_SUPPORT_KMEM_H__ #include <linux/slab.h> #include <linux/sched.h> #include <linux/mm.h> #include <linux/vmalloc.h> /* * General memory allocation interfaces */ typedef unsigned __bitwise xfs_km_flags_t; #define KM_SLEEP ((__force xfs_km_flags_t)0x0001u) #define KM_NOSLEEP ((__force xfs_km_flags_t)0x0002u) #define KM_NOFS ((__force xfs_km_flags_t)0x0004u) #define KM_MAYFAIL ((__force xfs_km_flags_t)0x0008u) #define KM_ZERO ((__force xfs_km_flags_t)0x0010u) /* * We use a special process flag to avoid recursive callbacks into * the filesystem during transactions. We will also issue our own * warnings, so we explicitly skip any generic ones (silly of us). */ static inline gfp_t kmem_flags_convert(xfs_km_flags_t flags) { gfp_t lflags; BUG_ON(flags & ~(KM_SLEEP|KM_NOSLEEP|KM_NOFS|KM_MAYFAIL|KM_ZERO)); if (flags & KM_NOSLEEP) { lflags = GFP_ATOMIC | __GFP_NOWARN; } else { lflags = GFP_KERNEL | __GFP_NOWARN; if ((current->flags & PF_FSTRANS) || (flags & KM_NOFS)) lflags &= ~__GFP_FS; } if (flags & KM_ZERO) lflags |= __GFP_ZERO; return lflags; } extern void *kmem_alloc(size_t, xfs_km_flags_t); extern void *kmem_zalloc_large(size_t size, xfs_km_flags_t); extern void *kmem_realloc(const void *, size_t, size_t, xfs_km_flags_t); extern void kmem_free(const void *); extern void *kmem_zalloc_greedy(size_t *, size_t, size_t); static inline void * kmem_zalloc(size_t size, xfs_km_flags_t flags) { return kmem_alloc(size, flags | KM_ZERO); } /* * Zone interfaces */ #define KM_ZONE_HWALIGN SLAB_HWCACHE_ALIGN #define KM_ZONE_RECLAIM SLAB_RECLAIM_ACCOUNT #define KM_ZONE_SPREAD SLAB_MEM_SPREAD #define kmem_zone kmem_cache #define kmem_zone_t struct kmem_cache static inline kmem_zone_t * kmem_zone_init(int size, char *zone_name) { return kmem_cache_create(zone_name, size, 0, 0, NULL); } static inline kmem_zone_t * kmem_zone_init_flags(int size, char *zone_name, unsigned long flags, void (*construct)(void *)) { return kmem_cache_create(zone_name, size, 0, flags, construct); } static inline void kmem_zone_free(kmem_zone_t *zone, void *ptr) { kmem_cache_free(zone, ptr); } static inline void kmem_zone_destroy(kmem_zone_t *zone) { if (zone) kmem_cache_destroy(zone); } extern void *kmem_zone_alloc(kmem_zone_t *, xfs_km_flags_t); static inline void * kmem_zone_zalloc(kmem_zone_t *zone, xfs_km_flags_t flags) { return kmem_zone_alloc(zone, flags | KM_ZERO); } #endif /* __XFS_SUPPORT_KMEM_H__ */ |