/* SPDX-License-Identifier: GPL-2.0 */ #ifndef _ASM_GENERIC_BITOPS_LOCK_H_ #define _ASM_GENERIC_BITOPS_LOCK_H_ /** * test_and_set_bit_lock - Set a bit and return its old value, for lock * @nr: Bit to set * @addr: Address to count from * * This operation is atomic and provides acquire barrier semantics. * It can be used to implement bit locks. */ #define test_and_set_bit_lock(nr, addr) test_and_set_bit(nr, addr) /** * clear_bit_unlock - Clear a bit in memory, for unlock * @nr: the bit to set * @addr: the address to start counting from * * This operation is atomic and provides release barrier semantics. */ #define clear_bit_unlock(nr, addr) \ do { \ smp_mb__before_atomic(); \ clear_bit(nr, addr); \ } while (0) /** * __clear_bit_unlock - Clear a bit in memory, for unlock * @nr: the bit to set * @addr: the address to start counting from * * A weaker form of clear_bit_unlock() as used by __bit_lock_unlock(). If all * the bits in the word are protected by this lock some archs can use weaker * ops to safely unlock. * * See for example x86's implementation. */ #define __clear_bit_unlock(nr, addr) \ do { \ smp_mb__before_atomic(); \ clear_bit(nr, addr); \ } while (0) #endif /* _ASM_GENERIC_BITOPS_LOCK_H_ */
Name | Type | Size | Permission | Actions |
---|---|---|---|---|
__ffs.h | File | 777 B | 0644 |
|
__fls.h | File | 920 B | 0644 |
|
arch_hweight.h | File | 555 B | 0644 |
|
atomic.h | File | 5.5 KB | 0644 |
|
builtin-__ffs.h | File | 379 B | 0644 |
|
builtin-__fls.h | File | 436 B | 0644 |
|
builtin-ffs.h | File | 410 B | 0644 |
|
builtin-fls.h | File | 403 B | 0644 |
|
const_hweight.h | File | 1.67 KB | 0644 |
|
ext2-atomic-setbit.h | File | 403 B | 0644 |
|
ext2-atomic.h | File | 600 B | 0644 |
|
ffs.h | File | 654 B | 0644 |
|
ffz.h | File | 325 B | 0644 |
|
find.h | File | 1.94 KB | 0644 |
|
fls.h | File | 674 B | 0644 |
|
fls64.h | File | 860 B | 0644 |
|
hweight.h | File | 254 B | 0644 |
|
le.h | File | 2.19 KB | 0644 |
|
lock.h | File | 1.23 KB | 0644 |
|
non-atomic.h | File | 3 KB | 0644 |
|
sched.h | File | 760 B | 0644 |
|