| /* |
| * Copyright (c) 2000-2004 Silicon Graphics, Inc. All Rights Reserved. |
| * |
| * This program is free software; you can redistribute it and/or modify it |
| * under the terms of version 2 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. |
| * |
| * Further, this software is distributed without any warranty that it is |
| * free of the rightful claim of any third person regarding infringement |
| * or the like. Any license provided herein, whether implied or |
| * otherwise, applies only to this software file. Patent licenses, if |
| * any, provided herein do not apply to combinations of this program with |
| * other software, or any other product whatsoever. |
| * |
| * You should have received a copy of the GNU General Public License along |
| * with this program; if not, write the Free Software Foundation, Inc., 59 |
| * Temple Place - Suite 330, Boston MA 02111-1307, USA. |
| * |
| * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy, |
| * Mountain View, CA 94043, or: |
| * |
| * http://www.sgi.com |
| * |
| * For further information regarding this notice, see: |
| * |
| * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/ |
| */ |
| #ifndef __XFS_SUPPORT_KMEM_H__ |
| #define __XFS_SUPPORT_KMEM_H__ |
| |
| #include <linux/slab.h> |
| #include <linux/sched.h> |
| #include <linux/mm.h> |
| |
| /* |
| * memory management routines |
| */ |
| #define KM_SLEEP 0x0001u |
| #define KM_NOSLEEP 0x0002u |
| #define KM_NOFS 0x0004u |
| #define KM_MAYFAIL 0x0008u |
| |
| #define kmem_zone kmem_cache_s |
| #define kmem_zone_t kmem_cache_t |
| |
| typedef unsigned long xfs_pflags_t; |
| |
| #define PFLAGS_TEST_NOIO() (current->flags & PF_NOIO) |
| #define PFLAGS_TEST_FSTRANS() (current->flags & PF_FSTRANS) |
| |
| #define PFLAGS_SET_NOIO() do { \ |
| current->flags |= PF_NOIO; \ |
| } while (0) |
| |
| #define PFLAGS_CLEAR_NOIO() do { \ |
| current->flags &= ~PF_NOIO; \ |
| } while (0) |
| |
| /* these could be nested, so we save state */ |
| #define PFLAGS_SET_FSTRANS(STATEP) do { \ |
| *(STATEP) = current->flags; \ |
| current->flags |= PF_FSTRANS; \ |
| } while (0) |
| |
| #define PFLAGS_CLEAR_FSTRANS(STATEP) do { \ |
| *(STATEP) = current->flags; \ |
| current->flags &= ~PF_FSTRANS; \ |
| } while (0) |
| |
| /* Restore the PF_FSTRANS state to what was saved in STATEP */ |
| #define PFLAGS_RESTORE_FSTRANS(STATEP) do { \ |
| current->flags = ((current->flags & ~PF_FSTRANS) | \ |
| (*(STATEP) & PF_FSTRANS)); \ |
| } while (0) |
| |
| #define PFLAGS_DUP(OSTATEP, NSTATEP) do { \ |
| *(NSTATEP) = *(OSTATEP); \ |
| } while (0) |
| |
| static __inline unsigned int kmem_flags_convert(unsigned int __nocast flags) |
| { |
| unsigned int lflags = __GFP_NOWARN; /* we'll report problems, if need be */ |
| |
| #ifdef DEBUG |
| if (unlikely(flags & ~(KM_SLEEP|KM_NOSLEEP|KM_NOFS|KM_MAYFAIL))) { |
| printk(KERN_WARNING |
| "XFS: memory allocation with wrong flags (%x)\n", flags); |
| BUG(); |
| } |
| #endif |
| |
| if (flags & KM_NOSLEEP) { |
| lflags |= GFP_ATOMIC; |
| } else { |
| lflags |= GFP_KERNEL; |
| |
| /* avoid recusive callbacks to filesystem during transactions */ |
| if (PFLAGS_TEST_FSTRANS() || (flags & KM_NOFS)) |
| lflags &= ~__GFP_FS; |
| } |
| |
| return lflags; |
| } |
| |
| static __inline kmem_zone_t * |
| kmem_zone_init(int size, char *zone_name) |
| { |
| return kmem_cache_create(zone_name, size, 0, 0, NULL, NULL); |
| } |
| |
| 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)) |
| BUG(); |
| } |
| |
| extern void *kmem_zone_zalloc(kmem_zone_t *, unsigned int __nocast); |
| extern void *kmem_zone_alloc(kmem_zone_t *, unsigned int __nocast); |
| |
| extern void *kmem_alloc(size_t, unsigned int __nocast); |
| extern void *kmem_realloc(void *, size_t, size_t, |
| unsigned int __nocast); |
| extern void *kmem_zalloc(size_t, unsigned int __nocast); |
| extern void kmem_free(void *, size_t); |
| |
| typedef struct shrinker *kmem_shaker_t; |
| typedef int (*kmem_shake_func_t)(int, unsigned int); |
| |
| static __inline kmem_shaker_t |
| kmem_shake_register(kmem_shake_func_t sfunc) |
| { |
| return set_shrinker(DEFAULT_SEEKS, sfunc); |
| } |
| |
| static __inline void |
| kmem_shake_deregister(kmem_shaker_t shrinker) |
| { |
| remove_shrinker(shrinker); |
| } |
| |
| static __inline int |
| kmem_shake_allow(unsigned int gfp_mask) |
| { |
| return (gfp_mask & __GFP_WAIT); |
| } |
| |
| #endif /* __XFS_SUPPORT_KMEM_H__ */ |