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Diffstat (limited to 'fs/ntfs/malloc.h')
-rw-r--r-- | fs/ntfs/malloc.h | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/fs/ntfs/malloc.h b/fs/ntfs/malloc.h new file mode 100644 index 000000000000..fac5944df6d8 --- /dev/null +++ b/fs/ntfs/malloc.h | |||
@@ -0,0 +1,62 @@ | |||
1 | /* | ||
2 | * malloc.h - NTFS kernel memory handling. Part of the Linux-NTFS project. | ||
3 | * | ||
4 | * Copyright (c) 2001-2004 Anton Altaparmakov | ||
5 | * | ||
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. | ||
10 | * | ||
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. | ||
15 | * | ||
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 | ||
20 | */ | ||
21 | |||
22 | #ifndef _LINUX_NTFS_MALLOC_H | ||
23 | #define _LINUX_NTFS_MALLOC_H | ||
24 | |||
25 | #include <linux/vmalloc.h> | ||
26 | #include <linux/slab.h> | ||
27 | #include <linux/highmem.h> | ||
28 | |||
29 | /** | ||
30 | * ntfs_malloc_nofs - allocate memory in multiples of pages | ||
31 | * @size number of bytes to allocate | ||
32 | * | ||
33 | * Allocates @size bytes of memory, rounded up to multiples of PAGE_SIZE and | ||
34 | * returns a pointer to the allocated memory. | ||
35 | * | ||
36 | * If there was insufficient memory to complete the request, return NULL. | ||
37 | */ | ||
38 | static inline void *ntfs_malloc_nofs(unsigned long size) | ||
39 | { | ||
40 | if (likely(size <= PAGE_SIZE)) { | ||
41 | BUG_ON(!size); | ||
42 | /* kmalloc() has per-CPU caches so is faster for now. */ | ||
43 | return kmalloc(PAGE_SIZE, GFP_NOFS); | ||
44 | /* return (void *)__get_free_page(GFP_NOFS | __GFP_HIGHMEM); */ | ||
45 | } | ||
46 | if (likely(size >> PAGE_SHIFT < num_physpages)) | ||
47 | return __vmalloc(size, GFP_NOFS | __GFP_HIGHMEM, PAGE_KERNEL); | ||
48 | return NULL; | ||
49 | } | ||
50 | |||
51 | static inline void ntfs_free(void *addr) | ||
52 | { | ||
53 | if (likely(((unsigned long)addr < VMALLOC_START) || | ||
54 | ((unsigned long)addr >= VMALLOC_END ))) { | ||
55 | kfree(addr); | ||
56 | /* free_page((unsigned long)addr); */ | ||
57 | return; | ||
58 | } | ||
59 | vfree(addr); | ||
60 | } | ||
61 | |||
62 | #endif /* _LINUX_NTFS_MALLOC_H */ | ||