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/* 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_ */


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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