Merge "mm: showmem: make the notifiers atomic"

// SPDX-License-Identifier: GPL-2.0-only

/*

 * Copyright (c) 2014, The Linux Foundation. All rights reserved.

 * Copyright (c) 2014-2015, The Linux Foundation. All rights reserved.

 */

#include <linux/kernel.h>

#include <linux/init.h>

#include <linux/show_mem_notifier.h>

static BLOCKING_NOTIFIER_HEAD(show_mem_notifier);

static ATOMIC_NOTIFIER_HEAD(show_mem_notifier);

int show_mem_notifier_register(struct notifier_block *nb)

{

	return blocking_notifier_chain_register(&show_mem_notifier, nb);

	return atomic_notifier_chain_register(&show_mem_notifier, nb);

}

int show_mem_notifier_unregister(struct notifier_block *nb)

{

	return blocking_notifier_chain_unregister(&show_mem_notifier, nb);

	return  atomic_notifier_chain_unregister(&show_mem_notifier, nb);

}

void show_mem_call_notifiers(void)

{

	blocking_notifier_call_chain(&show_mem_notifier, 0, NULL);

	atomic_notifier_call_chain(&show_mem_notifier, 0, NULL);

}

static int show_mem_notifier_get(void *dat, u64 *val)