| lh | 9ed821d | 2023-04-07 01:36:19 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2000-2005 Silicon Graphics, Inc. |
| 3 | * All Rights Reserved. |
| 4 | * |
| 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. |
| 8 | * |
| 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. |
| 13 | * |
| 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 |
| 17 | */ |
| 18 | #ifndef __XFS_SUPPORT_KMEM_H__ |
| 19 | #define __XFS_SUPPORT_KMEM_H__ |
| 20 | |
| 21 | #include <linux/slab.h> |
| 22 | #include <linux/sched.h> |
| 23 | #include <linux/mm.h> |
| 24 | #include <linux/vmalloc.h> |
| 25 | |
| 26 | /* |
| 27 | * General memory allocation interfaces |
| 28 | */ |
| 29 | |
| 30 | #define KM_SLEEP 0x0001u |
| 31 | #define KM_NOSLEEP 0x0002u |
| 32 | #define KM_NOFS 0x0004u |
| 33 | #define KM_MAYFAIL 0x0008u |
| 34 | |
| 35 | /* |
| 36 | * We use a special process flag to avoid recursive callbacks into |
| 37 | * the filesystem during transactions. We will also issue our own |
| 38 | * warnings, so we explicitly skip any generic ones (silly of us). |
| 39 | */ |
| 40 | static inline gfp_t |
| 41 | kmem_flags_convert(unsigned int __nocast flags) |
| 42 | { |
| 43 | gfp_t lflags; |
| 44 | |
| 45 | BUG_ON(flags & ~(KM_SLEEP|KM_NOSLEEP|KM_NOFS|KM_MAYFAIL)); |
| 46 | |
| 47 | if (flags & KM_NOSLEEP) { |
| 48 | lflags = GFP_ATOMIC | __GFP_NOWARN; |
| 49 | } else { |
| 50 | lflags = GFP_KERNEL | __GFP_NOWARN; |
| 51 | if ((current->flags & PF_FSTRANS) || (flags & KM_NOFS)) |
| 52 | lflags &= ~__GFP_FS; |
| 53 | } |
| 54 | return lflags; |
| 55 | } |
| 56 | |
| 57 | extern void *kmem_alloc(size_t, unsigned int __nocast); |
| 58 | extern void *kmem_zalloc(size_t, unsigned int __nocast); |
| 59 | extern void *kmem_realloc(const void *, size_t, size_t, unsigned int __nocast); |
| 60 | extern void kmem_free(const void *); |
| 61 | |
| 62 | static inline void *kmem_zalloc_large(size_t size) |
| 63 | { |
| 64 | return vzalloc(size); |
| 65 | } |
| 66 | static inline void kmem_free_large(void *ptr) |
| 67 | { |
| 68 | vfree(ptr); |
| 69 | } |
| 70 | |
| 71 | extern void *kmem_zalloc_greedy(size_t *, size_t, size_t); |
| 72 | |
| 73 | /* |
| 74 | * Zone interfaces |
| 75 | */ |
| 76 | |
| 77 | #define KM_ZONE_HWALIGN SLAB_HWCACHE_ALIGN |
| 78 | #define KM_ZONE_RECLAIM SLAB_RECLAIM_ACCOUNT |
| 79 | #define KM_ZONE_SPREAD SLAB_MEM_SPREAD |
| 80 | |
| 81 | #define kmem_zone kmem_cache |
| 82 | #define kmem_zone_t struct kmem_cache |
| 83 | |
| 84 | static inline kmem_zone_t * |
| 85 | kmem_zone_init(int size, char *zone_name) |
| 86 | { |
| 87 | return kmem_cache_create(zone_name, size, 0, 0, NULL); |
| 88 | } |
| 89 | |
| 90 | static inline kmem_zone_t * |
| 91 | kmem_zone_init_flags(int size, char *zone_name, unsigned long flags, |
| 92 | void (*construct)(void *)) |
| 93 | { |
| 94 | return kmem_cache_create(zone_name, size, 0, flags, construct); |
| 95 | } |
| 96 | |
| 97 | static inline void |
| 98 | kmem_zone_free(kmem_zone_t *zone, void *ptr) |
| 99 | { |
| 100 | kmem_cache_free(zone, ptr); |
| 101 | } |
| 102 | |
| 103 | static inline void |
| 104 | kmem_zone_destroy(kmem_zone_t *zone) |
| 105 | { |
| 106 | if (zone) |
| 107 | kmem_cache_destroy(zone); |
| 108 | } |
| 109 | |
| 110 | extern void *kmem_zone_alloc(kmem_zone_t *, unsigned int __nocast); |
| 111 | extern void *kmem_zone_zalloc(kmem_zone_t *, unsigned int __nocast); |
| 112 | |
| 113 | #endif /* __XFS_SUPPORT_KMEM_H__ */ |