malloc.h

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/*
 * malloc.h - NTFS kernel memory handling. Part of the Linux-NTFS project.
 *
 * Copyright (c) 2001-2005 Anton Altaparmakov
 *
 * This program/include file 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; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program/include file is distributed in the hope that it will 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 (in the main directory of the Linux-NTFS
 * distribution in the file COPYING); if not, write to the Free Software
 * Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#ifndef _LINUX_NTFS_MALLOC_H
#define _LINUX_NTFS_MALLOC_H

#include <linux/vmalloc.h>
#include <linux/slab.h>
#include <linux/highmem.h>

static inline void *__ntfs_malloc(unsigned long size, gfp_t gfp_mask)
{
    if (likely(size <= PAGE_SIZE)) {
        BUG_ON(!size);
        /* kmalloc() has per-CPU caches so is faster for now. */
        return kmalloc(PAGE_SIZE, gfp_mask & ~__GFP_HIGHMEM);
        /* return (void *)__get_free_page(gfp_mask); */
    }
    if (likely((size >> PAGE_SHIFT) < totalram_pages))
        return __vmalloc(size, gfp_mask, PAGE_KERNEL);
    return NULL;
}

static inline void *ntfs_malloc_nofs(unsigned long size)
{
    return __ntfs_malloc(size, GFP_NOFS | __GFP_HIGHMEM);
}

static inline void *ntfs_malloc_nofs_nofail(unsigned long size)
{
    return __ntfs_malloc(size, GFP_NOFS | __GFP_HIGHMEM | __GFP_NOFAIL);
}

static inline void ntfs_free(void *addr)
{
    if (!is_vmalloc_addr(addr)) {
        kfree(addr);
        /* free_page((unsigned long)addr); */
        return;
    }
    vfree(addr);
}

#endif /* _LINUX_NTFS_MALLOC_H */