linux/kernel/locking/qrwlock.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Queued read/write locks
 *
 * (C) Copyright 2013-2014 Hewlett-Packard Development Company, L.P.
 *
 * Authors: Waiman Long <[email protected]>
 */
#include <linux/smp.h>
#include <linux/bug.h>
#include <linux/cpumask.h>
#include <linux/percpu.h>
#include <linux/hardirq.h>
#include <linux/spinlock.h>
#include <trace/events/lock.h>

/**
 * queued_read_lock_slowpath - acquire read lock of a queued rwlock
 * @lock: Pointer to queued rwlock structure
 */
void __lockfunc queued_read_lock_slowpath(struct qrwlock *lock)
{ … }
EXPORT_SYMBOL(…);

/**
 * queued_write_lock_slowpath - acquire write lock of a queued rwlock
 * @lock : Pointer to queued rwlock structure
 */
void __lockfunc queued_write_lock_slowpath(struct qrwlock *lock)
{ … }
EXPORT_SYMBOL(…);