[XFS] really delete kmem.c

SGI Modid: 2.5.x-xfs:slinx:148936a

fs/xfs/support/kmem.c

-/*
- * Copyright (c) 2000-2002 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/
- */
-
-#include <linux/sched.h>
-#include <linux/mm.h>
-#include <linux/highmem.h>
-#include <linux/vmalloc.h>
-#include <linux/slab.h>
-
-#include "time.h"
-#include "kmem.h"
-
-#define DEF_PRIORITY	(6)
-#define MAX_SLAB_SIZE	0x10000
-
-static __inline unsigned int flag_convert(int flags)
-{
-#if DEBUG
-	if (unlikely(flags & ~(KM_SLEEP|KM_NOSLEEP|KM_NOFS))) {
-		printk(KERN_WARNING
-		    "XFS: memory allocation with wrong flags (%x)\n", flags);
-		BUG();
-	}
-#endif
-
-	if (flags & KM_NOSLEEP)
-		return GFP_ATOMIC;
-	/* If we're in a transaction, FS activity is not ok */
-	else if ((current->flags & PF_FSTRANS) || (flags & KM_NOFS))
-		return GFP_NOFS;
-	else
-		return GFP_KERNEL;
-}
-
-#define MAX_SHAKE 8
-
-static kmem_shake_func_t	shake_list[MAX_SHAKE];
-static DECLARE_MUTEX(shake_sem);
-
-void	kmem_shake_register(kmem_shake_func_t sfunc)
-{
-	int	i;
-
-	down(&shake_sem);
-	for (i = 0; i < MAX_SHAKE; i++) {
-		if (shake_list[i] == NULL) {
-			shake_list[i] = sfunc;
-			break;
-		}
-	}
-	if (i == MAX_SHAKE)
-		BUG();
-	up(&shake_sem);
-}
-
-void	kmem_shake_deregister(kmem_shake_func_t sfunc)
-{
-	int	i;
-
-	down(&shake_sem);
-	for (i = 0; i < MAX_SHAKE; i++) {
-		if (shake_list[i] == sfunc)
-			break;
-	}
-	if (i == MAX_SHAKE)
-		BUG();
-	for (; i < MAX_SHAKE - 1; i++) {
-		shake_list[i] = shake_list[i+1];
-	}
-	shake_list[i] = NULL;
-	up(&shake_sem);
-}
-
-static __inline__ void kmem_shake(void)
-{
-	int	i;
-
-	down(&shake_sem);
-	for (i = 0; i < MAX_SHAKE && shake_list[i]; i++)
-		(*shake_list[i])();
-	up(&shake_sem);
-	delay(10);
-}
-
-void *
-kmem_alloc(size_t size, int flags)
-{
-	int	shrink = DEF_PRIORITY;	/* # times to try to shrink cache */
-	void	*rval;
-
-repeat:
-	if (MAX_SLAB_SIZE < size) {
-		/* Avoid doing filesystem sensitive stuff to get this */
-		rval = __vmalloc(size, flag_convert(flags), PAGE_KERNEL);
-	} else {
-		rval = kmalloc(size, flag_convert(flags));
-	}
-
-	if (rval || (flags & KM_NOSLEEP))
-		return rval;
-
-	/*
-	 * KM_SLEEP callers don't expect a failure
-	 */
-	if (shrink) {
-		kmem_shake();
-
-		shrink--;
-		goto repeat;
-	}
-
-	rval = __vmalloc(size, flag_convert(flags), PAGE_KERNEL);
-	if (!rval && (flags & KM_SLEEP))
-		panic("kmem_alloc: NULL memory on KM_SLEEP request!");
-
-	return rval;
-}
-
-void *
-kmem_zalloc(size_t size, int flags)
-{
-	void	*ptr;
-
-	ptr = kmem_alloc(size, flags);
-
-	if (ptr)
-		memset((char *)ptr, 0, (int)size);
-
-	return (ptr);
-}
-
-void
-kmem_free(void *ptr, size_t size)
-{
-	if (((unsigned long)ptr < VMALLOC_START) ||
-	    ((unsigned long)ptr >= VMALLOC_END)) {
-		kfree(ptr);
-	} else {
-		vfree(ptr);
-	}
-}
-
-void *
-kmem_realloc(void *ptr, size_t newsize, size_t oldsize, int flags)
-{
-	void *new;
-
-	new = kmem_alloc(newsize, flags);
-	if (ptr) {
-		if (new)
-			memcpy(new, ptr,
-				((oldsize < newsize) ? oldsize : newsize));
-		kmem_free(ptr, oldsize);
-	}
-
-	return new;
-}
-
-kmem_zone_t *
-kmem_zone_init(int size, char *zone_name)
-{
-	return kmem_cache_create(zone_name, size, 0, 0, NULL, NULL);
-}
-
-void *
-kmem_zone_alloc(kmem_zone_t *zone, int flags)
-{
-	int	shrink = DEF_PRIORITY;	/* # times to try to shrink cache */
-	void	*ptr = NULL;
-
-repeat:
-	ptr = kmem_cache_alloc(zone, flag_convert(flags));
-
-	if (ptr || (flags & KM_NOSLEEP))
-		return ptr;
-
-	/*
-	 * KM_SLEEP callers don't expect a failure
-	 */
-	if (shrink) {
-		kmem_shake();
-
-		shrink--;
-		goto repeat;
-	}
-
-	if (flags & KM_SLEEP)
-		panic("kmem_zone_alloc: NULL memory on KM_SLEEP request!");
-
-	return NULL;
-}
-
-void *
-kmem_zone_zalloc(kmem_zone_t *zone, int flags)
-{
-	int	shrink = DEF_PRIORITY;	/* # times to try to shrink cache */
-	void	*ptr = NULL;
-
-repeat:
-	ptr = kmem_cache_alloc(zone, flag_convert(flags));
-
-	if (ptr) {
-		memset(ptr, 0, kmem_cache_size(zone));
-		return ptr;
-	}
-
-	if (flags & KM_NOSLEEP)
-		return ptr;
-
-	/*
-	 * KM_SLEEP callers don't expect a failure
-	 */
-	if (shrink) {
-		kmem_shake();
-
-		shrink--;
-		goto repeat;
-	}
-
-	if (flags & KM_SLEEP)
-		panic("kmem_zone_zalloc: NULL memory on KM_SLEEP request!");
-
-	return NULL;
-}
-
-void
-kmem_zone_free(kmem_zone_t *zone, void *ptr)
-{
-	kmem_cache_free(zone, ptr);
-}