2 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
7 * published by the Free Software Foundation.
9 * This program is distributed in the hope that it would be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
18 #ifndef __XFS_SUPPORT_KMEM_H__
19 #define __XFS_SUPPORT_KMEM_H__
21 #include <linux/slab.h>
22 #include <linux/sched.h>
24 #include <linux/vmalloc.h>
27 * General memory allocation interfaces
30 typedef unsigned __bitwise xfs_km_flags_t;
31 #define KM_SLEEP ((__force xfs_km_flags_t)0x0001u)
32 #define KM_NOSLEEP ((__force xfs_km_flags_t)0x0002u)
33 #define KM_NOFS ((__force xfs_km_flags_t)0x0004u)
34 #define KM_MAYFAIL ((__force xfs_km_flags_t)0x0008u)
35 #define KM_ZERO ((__force xfs_km_flags_t)0x0010u)
38 * We use a special process flag to avoid recursive callbacks into
39 * the filesystem during transactions. We will also issue our own
40 * warnings, so we explicitly skip any generic ones (silly of us).
43 kmem_flags_convert(xfs_km_flags_t flags)
47 BUG_ON(flags & ~(KM_SLEEP|KM_NOSLEEP|KM_NOFS|KM_MAYFAIL|KM_ZERO));
49 if (flags & KM_NOSLEEP) {
50 lflags = GFP_ATOMIC | __GFP_NOWARN;
52 lflags = GFP_KERNEL | __GFP_NOWARN;
53 if ((current->flags & PF_FSTRANS) || (flags & KM_NOFS))
63 extern void *kmem_alloc(size_t, xfs_km_flags_t);
64 extern void *kmem_zalloc_large(size_t size, xfs_km_flags_t);
65 extern void *kmem_realloc(const void *, size_t, size_t, xfs_km_flags_t);
66 extern void kmem_free(const void *);
69 extern void *kmem_zalloc_greedy(size_t *, size_t, size_t);
72 kmem_zalloc(size_t size, xfs_km_flags_t flags)
74 return kmem_alloc(size, flags | KM_ZERO);
81 #define KM_ZONE_HWALIGN SLAB_HWCACHE_ALIGN
82 #define KM_ZONE_RECLAIM SLAB_RECLAIM_ACCOUNT
83 #define KM_ZONE_SPREAD SLAB_MEM_SPREAD
85 #define kmem_zone kmem_cache
86 #define kmem_zone_t struct kmem_cache
88 static inline kmem_zone_t *
89 kmem_zone_init(int size, char *zone_name)
91 return kmem_cache_create(zone_name, size, 0, 0, NULL);
94 static inline kmem_zone_t *
95 kmem_zone_init_flags(int size, char *zone_name, unsigned long flags,
96 void (*construct)(void *))
98 return kmem_cache_create(zone_name, size, 0, flags, construct);
102 kmem_zone_free(kmem_zone_t *zone, void *ptr)
104 kmem_cache_free(zone, ptr);
108 kmem_zone_destroy(kmem_zone_t *zone)
111 kmem_cache_destroy(zone);
114 extern void *kmem_zone_alloc(kmem_zone_t *, xfs_km_flags_t);
117 kmem_zone_zalloc(kmem_zone_t *zone, xfs_km_flags_t flags)
119 return kmem_zone_alloc(zone, flags | KM_ZERO);
122 #endif /* __XFS_SUPPORT_KMEM_H__ */