359d992bcd
Introduce flag KM_ZERO which is used to alloc zeroed entry, and convert
kmem_{zone_}zalloc to call kmem_{zone_}alloc() with KM_ZERO directly,
in order to avoid the setting to zero step.
And following Dave's suggestion, make kmem_{zone_}zalloc static inline
into kmem.h as they're now just a simple wrapper.
V2:
Make kmem_{zone_}zalloc static inline into kmem.h as Dave suggested.
Signed-off-by: Gu Zheng <guz.fnst@cn.fujitsu.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Ben Myers <bpm@sgi.com>
122 lines
3.2 KiB
C
122 lines
3.2 KiB
C
/*
|
|
* Copyright (c) 2000-2005 Silicon Graphics, Inc.
|
|
* All Rights Reserved.
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms 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. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write the Free Software Foundation,
|
|
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
#ifndef __XFS_SUPPORT_KMEM_H__
|
|
#define __XFS_SUPPORT_KMEM_H__
|
|
|
|
#include <linux/slab.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/vmalloc.h>
|
|
|
|
/*
|
|
* General memory allocation interfaces
|
|
*/
|
|
|
|
typedef unsigned __bitwise xfs_km_flags_t;
|
|
#define KM_SLEEP ((__force xfs_km_flags_t)0x0001u)
|
|
#define KM_NOSLEEP ((__force xfs_km_flags_t)0x0002u)
|
|
#define KM_NOFS ((__force xfs_km_flags_t)0x0004u)
|
|
#define KM_MAYFAIL ((__force xfs_km_flags_t)0x0008u)
|
|
#define KM_ZERO ((__force xfs_km_flags_t)0x0010u)
|
|
|
|
/*
|
|
* We use a special process flag to avoid recursive callbacks into
|
|
* the filesystem during transactions. We will also issue our own
|
|
* warnings, so we explicitly skip any generic ones (silly of us).
|
|
*/
|
|
static inline gfp_t
|
|
kmem_flags_convert(xfs_km_flags_t flags)
|
|
{
|
|
gfp_t lflags;
|
|
|
|
BUG_ON(flags & ~(KM_SLEEP|KM_NOSLEEP|KM_NOFS|KM_MAYFAIL|KM_ZERO));
|
|
|
|
if (flags & KM_NOSLEEP) {
|
|
lflags = GFP_ATOMIC | __GFP_NOWARN;
|
|
} else {
|
|
lflags = GFP_KERNEL | __GFP_NOWARN;
|
|
if ((current->flags & PF_FSTRANS) || (flags & KM_NOFS))
|
|
lflags &= ~__GFP_FS;
|
|
}
|
|
|
|
if (flags & KM_ZERO)
|
|
lflags |= __GFP_ZERO;
|
|
|
|
return lflags;
|
|
}
|
|
|
|
extern void *kmem_alloc(size_t, xfs_km_flags_t);
|
|
extern void *kmem_zalloc_large(size_t size, xfs_km_flags_t);
|
|
extern void *kmem_realloc(const void *, size_t, size_t, xfs_km_flags_t);
|
|
extern void kmem_free(const void *);
|
|
|
|
|
|
extern void *kmem_zalloc_greedy(size_t *, size_t, size_t);
|
|
|
|
static inline void *
|
|
kmem_zalloc(size_t size, xfs_km_flags_t flags)
|
|
{
|
|
return kmem_alloc(size, flags | KM_ZERO);
|
|
}
|
|
|
|
/*
|
|
* Zone interfaces
|
|
*/
|
|
|
|
#define KM_ZONE_HWALIGN SLAB_HWCACHE_ALIGN
|
|
#define KM_ZONE_RECLAIM SLAB_RECLAIM_ACCOUNT
|
|
#define KM_ZONE_SPREAD SLAB_MEM_SPREAD
|
|
|
|
#define kmem_zone kmem_cache
|
|
#define kmem_zone_t struct kmem_cache
|
|
|
|
static inline kmem_zone_t *
|
|
kmem_zone_init(int size, char *zone_name)
|
|
{
|
|
return kmem_cache_create(zone_name, size, 0, 0, NULL);
|
|
}
|
|
|
|
static inline kmem_zone_t *
|
|
kmem_zone_init_flags(int size, char *zone_name, unsigned long flags,
|
|
void (*construct)(void *))
|
|
{
|
|
return kmem_cache_create(zone_name, size, 0, flags, construct);
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
extern void *kmem_zone_alloc(kmem_zone_t *, xfs_km_flags_t);
|
|
|
|
static inline void *
|
|
kmem_zone_zalloc(kmem_zone_t *zone, xfs_km_flags_t flags)
|
|
{
|
|
return kmem_zone_alloc(zone, flags | KM_ZERO);
|
|
}
|
|
|
|
#endif /* __XFS_SUPPORT_KMEM_H__ */
|