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Nama	Ukuran	Aksi
arch_hweight.h	555 B	View DL Edit
atomic.h	1.64 MB	View DL Edit
builtin-ffs.h	374 B	View DL Edit
builtin-fls.h	412 B	View DL Edit
builtin-__ffs.h	379 B	View DL Edit
builtin-__fls.h	436 B	View DL Edit
const_hweight.h	1.67 MB	View DL Edit
ext2-atomic-setbit.h	403 B	View DL Edit
ext2-atomic.h	600 B	View DL Edit
ffs.h	654 B	View DL Edit
ffz.h	325 B	View DL Edit
fls.h	683 B	View DL Edit
fls64.h	860 B	View DL Edit
hweight.h	254 B	View DL Edit
instrumented-atomic.h	2.99 MB	View DL Edit
instrumented-lock.h	2.62 MB	View DL Edit
instrumented-non-atomic.h	4.67 MB	View DL Edit
le.h	1.3 MB	View DL Edit
lock.h	2.58 MB	View DL Edit
non-atomic.h	3.86 MB	View DL Edit
sched.h	760 B	View DL Edit
__ffs.h	777 B	View DL Edit
__fls.h	920 B	View DL Edit

Edit file: /usr/src/kernels/5.14.0-427.31.1.el9_4.x86_64/include/asm-generic/bitops/lock.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_GENERIC_BITOPS_LOCK_H_
#define _ASM_GENERIC_BITOPS_LOCK_H_

#include <linux/atomic.h>
#include <linux/compiler.h>
#include <asm/barrier.h>

/**
 * arch_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 if
 * the returned value is 0.
 * It can be used to implement bit locks.
 */
static __always_inline int
arch_test_and_set_bit_lock(unsigned int nr, volatile unsigned long *p)
{
	long old;
	unsigned long mask = BIT_MASK(nr);

p += BIT_WORD(nr);
	if (READ_ONCE(*p) & mask)
		return 1;

old = arch_atomic_long_fetch_or_acquire(mask, (atomic_long_t *)p);
	return !!(old & mask);
}

/**
 * arch_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.
 */
static __always_inline void
arch_clear_bit_unlock(unsigned int nr, volatile unsigned long *p)
{
	p += BIT_WORD(nr);
	arch_atomic_long_fetch_andnot_release(BIT_MASK(nr), (atomic_long_t *)p);
}

/**
 * arch___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.
 */
static inline void
arch___clear_bit_unlock(unsigned int nr, volatile unsigned long *p)
{
	unsigned long old;

p += BIT_WORD(nr);
	old = READ_ONCE(*p);
	old &= ~BIT_MASK(nr);
	arch_atomic_long_set_release((atomic_long_t *)p, old);
}

/**
 * arch_clear_bit_unlock_is_negative_byte - Clear a bit in memory and test if bottom
 *                                          byte is negative, for unlock.
 * @nr: the bit to clear
 * @addr: the address to start counting from
 *
 * This is a bit of a one-trick-pony for the filemap code, which clears
 * PG_locked and tests PG_waiters,
 */
#ifndef arch_clear_bit_unlock_is_negative_byte
static inline bool arch_clear_bit_unlock_is_negative_byte(unsigned int nr,
							  volatile unsigned long *p)
{
	long old;
	unsigned long mask = BIT_MASK(nr);

p += BIT_WORD(nr);
	old = arch_atomic_long_fetch_andnot_release(mask, (atomic_long_t *)p);
	return !!(old & BIT(7));
}
#define arch_clear_bit_unlock_is_negative_byte arch_clear_bit_unlock_is_negative_byte
#endif

#include <asm-generic/bitops/instrumented-lock.h>

#endif /* _ASM_GENERIC_BITOPS_LOCK_H_ */

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