/* * 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	0x0001#define KM_NOSLEEP	0x0002#define KM_NOFS		0x0004#define KM_MAYFAIL	0x0008#define	kmem_zone	kmem_cache_s#define kmem_zone_t	kmem_cache_ttypedef 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(int flags){	int lflags;#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 voidkmem_zone_free(kmem_zone_t *zone, void *ptr){	kmem_cache_free(zone, ptr);}static __inline voidkmem_zone_destroy(kmem_zone_t *zone){	if (zone && kmem_cache_destroy(zone))		BUG();}static __inline intkmem_zone_shrink(kmem_zone_t *zone){	return kmem_cache_shrink(zone);}extern void	    *kmem_zone_zalloc(kmem_zone_t *, int);extern void	    *kmem_zone_alloc(kmem_zone_t *, int);extern void	    *kmem_alloc(size_t, int);extern void	    *kmem_realloc(void *, size_t, size_t, int);extern void	    *kmem_zalloc(size_t, int);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_tkmem_shake_register(kmem_shake_func_t sfunc){	return set_shrinker(DEFAULT_SEEKS, sfunc);}static __inline voidkmem_shake_deregister(kmem_shaker_t shrinker){	remove_shrinker(shrinker);}static __inline intkmem_shake_allow(unsigned int gfp_mask){	return (gfp_mask & __GFP_WAIT);}#endif /* __XFS_SUPPORT_KMEM_H__ */