linux/drivers/w1/w1_family.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Copyright (c) 2004 Evgeniy Polyakov <[email protected]>
 */

#include <linux/spinlock.h>
#include <linux/list.h>
#include <linux/sched/signal.h>
#include <linux/delay.h>
#include <linux/export.h>

#include "w1_internal.h"

DEFINE_SPINLOCK(…);
static LIST_HEAD(w1_families);

/**
 * w1_register_family() - register a device family driver
 * @newf:	family to register
 */
int w1_register_family(struct w1_family *newf)
{ … }
EXPORT_SYMBOL(…);

/**
 * w1_unregister_family() - unregister a device family driver
 * @fent:	family to unregister
 */
void w1_unregister_family(struct w1_family *fent)
{ … }
EXPORT_SYMBOL(…);

/*
 * Should be called under w1_flock held.
 */
struct w1_family * w1_family_registered(u8 fid)
{ … }

static void __w1_family_put(struct w1_family *f)
{ … }

void w1_family_put(struct w1_family *f)
{ … }

#if 0
void w1_family_get(struct w1_family *f)
{
	spin_lock(&w1_flock);
	__w1_family_get(f);
	spin_unlock(&w1_flock);
}
#endif  /*  0  */

void __w1_family_get(struct w1_family *f)
{ … }