2 * malloc.h - NTFS kernel memory handling. Part of the Linux-NTFS project.
4 * Copyright (c) 2001,2002 Anton Altaparmakov.
6 * This program/include file is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License as published
8 * by the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program/include file is distributed in the hope that it will be
12 * useful, but WITHOUT ANY WARRANTY; without even the implied warranty
13 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program (in the main directory of the Linux-NTFS
18 * distribution in the file COPYING); if not, write to the Free Software
19 * Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 #ifndef _LINUX_NTFS_MALLOC_H
23 #define _LINUX_NTFS_MALLOC_H
25 #include <linux/vmalloc.h>
26 #include <linux/slab.h>
29 * ntfs_malloc_nofs - allocate memory in multiples of pages
30 * @size number of bytes to allocate
32 * Allocates @size bytes of memory, rounded up to multiples of PAGE_SIZE and
33 * returns a pointer to the allocated memory.
35 * If there was insufficient memory to complete the request, return NULL.
37 static inline void *ntfs_malloc_nofs(unsigned long size
)
39 if (likely(size
<= PAGE_SIZE
)) {
41 /* kmalloc() has per-CPU caches so if faster for now. */
42 return kmalloc(PAGE_SIZE
, GFP_NOFS
);
43 /* return (void *)__get_free_page(GFP_NOFS |
48 if (likely(size
>> PAGE_SHIFT
< num_physpages
))
49 return __vmalloc(size
, GFP_NOFS
| __GFP_HIGHMEM
, PAGE_KERNEL
);
53 static inline void ntfs_free(void *addr
)
55 if (likely(((unsigned long)addr
< VMALLOC_START
) ||
56 ((unsigned long)addr
>= VMALLOC_END
))) {
58 /* return free_page((unsigned long)addr); */
63 #endif /* _LINUX_NTFS_MALLOC_H */