dd0fc66fb3
- added typedef unsigned int __nocast gfp_t; - replaced __nocast uses for gfp flags with gfp_t - it gives exactly the same warnings as far as sparse is concerned, doesn't change generated code (from gcc point of view we replaced unsigned int with typedef) and documents what's going on far better. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
157 lines
4.2 KiB
C
157 lines
4.2 KiB
C
/*
|
|
* 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(gfp_t 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 *, gfp_t);
|
|
extern void *kmem_zone_alloc(kmem_zone_t *, gfp_t);
|
|
|
|
extern void *kmem_alloc(size_t, gfp_t);
|
|
extern void *kmem_realloc(void *, size_t, size_t, gfp_t);
|
|
extern void *kmem_zalloc(size_t, gfp_t);
|
|
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__ */
|