]>
git.proxmox.com Git - mirror_ubuntu-artful-kernel.git/blob - fs/xfs/kmem.h
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)
37 * We use a special process flag to avoid recursive callbacks into
38 * the filesystem during transactions. We will also issue our own
39 * warnings, so we explicitly skip any generic ones (silly of us).
42 kmem_flags_convert(xfs_km_flags_t flags
)
46 BUG_ON(flags
& ~(KM_SLEEP
|KM_NOSLEEP
|KM_NOFS
|KM_MAYFAIL
));
48 if (flags
& KM_NOSLEEP
) {
49 lflags
= GFP_ATOMIC
| __GFP_NOWARN
;
51 lflags
= GFP_KERNEL
| __GFP_NOWARN
;
52 if ((current
->flags
& PF_FSTRANS
) || (flags
& KM_NOFS
))
58 extern void *kmem_alloc(size_t, xfs_km_flags_t
);
59 extern void *kmem_zalloc(size_t, xfs_km_flags_t
);
60 extern void *kmem_zalloc_large(size_t size
, xfs_km_flags_t
);
61 extern void *kmem_realloc(const void *, size_t, size_t, xfs_km_flags_t
);
62 extern void kmem_free(const void *);
65 extern void *kmem_zalloc_greedy(size_t *, size_t, size_t);
71 #define KM_ZONE_HWALIGN SLAB_HWCACHE_ALIGN
72 #define KM_ZONE_RECLAIM SLAB_RECLAIM_ACCOUNT
73 #define KM_ZONE_SPREAD SLAB_MEM_SPREAD
75 #define kmem_zone kmem_cache
76 #define kmem_zone_t struct kmem_cache
78 static inline kmem_zone_t
*
79 kmem_zone_init(int size
, char *zone_name
)
81 return kmem_cache_create(zone_name
, size
, 0, 0, NULL
);
84 static inline kmem_zone_t
*
85 kmem_zone_init_flags(int size
, char *zone_name
, unsigned long flags
,
86 void (*construct
)(void *))
88 return kmem_cache_create(zone_name
, size
, 0, flags
, construct
);
92 kmem_zone_free(kmem_zone_t
*zone
, void *ptr
)
94 kmem_cache_free(zone
, ptr
);
98 kmem_zone_destroy(kmem_zone_t
*zone
)
101 kmem_cache_destroy(zone
);
104 extern void *kmem_zone_alloc(kmem_zone_t
*, xfs_km_flags_t
);
105 extern void *kmem_zone_zalloc(kmem_zone_t
*, xfs_km_flags_t
);
107 #endif /* __XFS_SUPPORT_KMEM_H__ */