Merge "mm: Add notifier framework for showing memory"

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

/*

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

 */

#include <linux/notifier.h>

int show_mem_notifier_register(struct notifier_block *nb);

int show_mem_notifier_unregister(struct notifier_block *nb);

void show_mem_call_notifiers(void);

			   mm_init.o mmu_context.o percpu.o slab_common.o \

			   compaction.o vmacache.o \

			   interval_tree.o list_lru.o workingset.o \

			   debug.o gup.o $(mmu-y)

			   debug.o gup.o $(mmu-y) showmem.o

# Give 'page_alloc' its own module-parameter namespace

page-alloc-y := page_alloc.o

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

/*

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

 */

#include <linux/kernel.h>

#include <linux/notifier.h>

#include <linux/debugfs.h>

#include <linux/fs.h>

#include <linux/init.h>

#include <linux/show_mem_notifier.h>

static BLOCKING_NOTIFIER_HEAD(show_mem_notifier);

int show_mem_notifier_register(struct notifier_block *nb)

{

	return blocking_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);

}

void show_mem_call_notifiers(void)

{

	blocking_notifier_call_chain(&show_mem_notifier, 0, NULL);

}

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

{

	show_mem_call_notifiers();

	*val = 0;

	return 0;

}

DEFINE_DEBUGFS_ATTRIBUTE(show_mem_notifier_debug_ops, show_mem_notifier_get,

				NULL, "%llu\n");

static int show_mem_notifier_debugfs_register(void)

{

	debugfs_create_file("show_mem_notifier", 0664, NULL, NULL,

				&show_mem_notifier_debug_ops);

	return 0;

}

late_initcall(show_mem_notifier_debugfs_register);