linux-imx

// SPDX-License-Identifier: GPL-2.0

/*

 * mm/debug.c

 *

 * mm/ specific debug routines.

 *

 */

​

#include <linux/kernel.h>

#include <linux/mm.h>

#include <linux/trace_events.h>

#include <linux/memcontrol.h>

#include <trace/events/mmflags.h>

#include <linux/migrate.h>

#include <linux/page_owner.h>

#include <linux/ctype.h>

​

#include "internal.h"

​

const char *migrate_reason_names[MR_TYPES] = {

    "compaction",

    "memory_failure",

    "memory_hotplug",

    "syscall_or_cpuset",

    "mempolicy_mbind",

    "numa_misplaced",

    "cma",

};

​

const struct trace_print_flags pageflag_names[] = {

    __def_pageflag_names,

    {0, NULL}

};

​

const struct trace_print_flags gfpflag_names[] = {

    __def_gfpflag_names,

    {0, NULL}

};

​

const struct trace_print_flags vmaflag_names[] = {

    __def_vmaflag_names,

    {0, NULL}

};

​

void __dump_page(struct page *page, const char *reason)

{

    struct address_space *mapping;

    bool page_poisoned = PagePoisoned(page);

    int mapcount;

​

    /*

     * If struct page is poisoned don't access Page*() functions as that

     * leads to recursive loop. Page*() check for poisoned pages, and calls

     * dump_page() when detected.

     */

    if (page_poisoned) {

        pr_warn("page:%px is uninitialized and poisoned", page);

        goto hex_only;

    }

​

    mapping = page_mapping(page);

​

    /*