Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
1/*
2 * Copyright (C) 2012 ARM Ltd.
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
12 *
13 * You should have received a copy of the GNU General Public License
14 * along with this program. If not, see <http://www.gnu.org/licenses/>.
15 */
16#ifndef __ASM_BITOPS_H
17#define __ASM_BITOPS_H
18
19#include <linux/compiler.h>
20
21#include <asm/barrier.h>
22
23/*
24 * clear_bit may not imply a memory barrier
25 */
26#ifndef smp_mb__before_clear_bit
27#define smp_mb__before_clear_bit() smp_mb()
28#define smp_mb__after_clear_bit() smp_mb()
29#endif
30
31#ifndef _LINUX_BITOPS_H
32#error only <linux/bitops.h> can be included directly
33#endif
34
35/*
36 * Little endian assembly atomic bitops.
37 */
38extern void set_bit(int nr, volatile unsigned long *p);
39extern void clear_bit(int nr, volatile unsigned long *p);
40extern void change_bit(int nr, volatile unsigned long *p);
41extern int test_and_set_bit(int nr, volatile unsigned long *p);
42extern int test_and_clear_bit(int nr, volatile unsigned long *p);
43extern int test_and_change_bit(int nr, volatile unsigned long *p);
44
45#include <asm-generic/bitops/builtin-__ffs.h>
46#include <asm-generic/bitops/builtin-ffs.h>
47#include <asm-generic/bitops/builtin-__fls.h>
48#include <asm-generic/bitops/builtin-fls.h>
49
50#include <asm-generic/bitops/ffz.h>
51#include <asm-generic/bitops/fls64.h>
52#include <asm-generic/bitops/find.h>
53
54#include <asm-generic/bitops/sched.h>
55#include <asm-generic/bitops/hweight.h>
56#include <asm-generic/bitops/lock.h>
57
58#include <asm-generic/bitops/non-atomic.h>
59#include <asm-generic/bitops/le.h>
60
61/*
62 * Ext2 is defined to use little-endian byte ordering.
63 */
64#define ext2_set_bit_atomic(lock, nr, p) test_and_set_bit_le(nr, p)
65#define ext2_clear_bit_atomic(lock, nr, p) test_and_clear_bit_le(nr, p)
66
67#endif /* __ASM_BITOPS_H */