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>
136 lines
3.3 KiB
C
136 lines
3.3 KiB
C
/*
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* Copyright (c) 2000-2004 Silicon Graphics, Inc. All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it would be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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*
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* Further, this software is distributed without any warranty that it is
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* free of the rightful claim of any third person regarding infringement
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* or the like. Any license provided herein, whether implied or
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* otherwise, applies only to this software file. Patent licenses, if
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* any, provided herein do not apply to combinations of this program with
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* other software, or any other product whatsoever.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write the Free Software Foundation, Inc., 59
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* Temple Place - Suite 330, Boston MA 02111-1307, USA.
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*
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* Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
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* Mountain View, CA 94043, or:
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*
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* http://www.sgi.com
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*
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* For further information regarding this notice, see:
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*
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* http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
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*/
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#include <linux/sched.h>
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#include <linux/mm.h>
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#include <linux/vmalloc.h>
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#include <linux/highmem.h>
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#include <linux/swap.h>
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#include <linux/blkdev.h>
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#include "time.h"
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#include "kmem.h"
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#define MAX_VMALLOCS 6
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#define MAX_SLAB_SIZE 0x20000
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void *
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kmem_alloc(size_t size, gfp_t flags)
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{
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int retries = 0;
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unsigned int lflags = kmem_flags_convert(flags);
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void *ptr;
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do {
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if (size < MAX_SLAB_SIZE || retries > MAX_VMALLOCS)
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ptr = kmalloc(size, lflags);
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else
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ptr = __vmalloc(size, lflags, PAGE_KERNEL);
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if (ptr || (flags & (KM_MAYFAIL|KM_NOSLEEP)))
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return ptr;
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if (!(++retries % 100))
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printk(KERN_ERR "XFS: possible memory allocation "
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"deadlock in %s (mode:0x%x)\n",
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__FUNCTION__, lflags);
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blk_congestion_wait(WRITE, HZ/50);
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} while (1);
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}
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void *
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kmem_zalloc(size_t size, gfp_t flags)
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{
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void *ptr;
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ptr = kmem_alloc(size, flags);
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if (ptr)
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memset((char *)ptr, 0, (int)size);
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return ptr;
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}
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void
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kmem_free(void *ptr, size_t size)
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{
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if (((unsigned long)ptr < VMALLOC_START) ||
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((unsigned long)ptr >= VMALLOC_END)) {
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kfree(ptr);
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} else {
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vfree(ptr);
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}
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}
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void *
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kmem_realloc(void *ptr, size_t newsize, size_t oldsize,
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gfp_t flags)
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{
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void *new;
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new = kmem_alloc(newsize, flags);
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if (ptr) {
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if (new)
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memcpy(new, ptr,
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((oldsize < newsize) ? oldsize : newsize));
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kmem_free(ptr, oldsize);
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}
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return new;
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}
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void *
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kmem_zone_alloc(kmem_zone_t *zone, gfp_t flags)
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{
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int retries = 0;
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unsigned int lflags = kmem_flags_convert(flags);
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void *ptr;
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do {
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ptr = kmem_cache_alloc(zone, lflags);
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if (ptr || (flags & (KM_MAYFAIL|KM_NOSLEEP)))
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return ptr;
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if (!(++retries % 100))
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printk(KERN_ERR "XFS: possible memory allocation "
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"deadlock in %s (mode:0x%x)\n",
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__FUNCTION__, lflags);
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blk_congestion_wait(WRITE, HZ/50);
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} while (1);
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}
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void *
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kmem_zone_zalloc(kmem_zone_t *zone, gfp_t flags)
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{
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void *ptr;
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ptr = kmem_zone_alloc(zone, flags);
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if (ptr)
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memset((char *)ptr, 0, kmem_cache_size(zone));
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return ptr;
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}
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