linux-imx

// SPDX-License-Identifier: GPL-2.0

/*

 * Basic Node interface support

 */

​

#include <linux/module.h>

#include <linux/init.h>

#include <linux/mm.h>

#include <linux/memory.h>

#include <linux/vmstat.h>

#include <linux/notifier.h>

#include <linux/node.h>

#include <linux/hugetlb.h>

#include <linux/compaction.h>

#include <linux/cpumask.h>

#include <linux/topology.h>

#include <linux/nodemask.h>

#include <linux/cpu.h>

#include <linux/device.h>

#include <linux/swap.h>

#include <linux/slab.h>

​

static struct bus_type node_subsys = {

    .name = "node",

    .dev_name = "node",

};

​

​

static ssize_t node_read_cpumap(struct device *dev, bool list, char *buf)

{

    ssize_t n;

    cpumask_var_t mask;

    struct node *node_dev = to_node(dev);

​

    /* 2008/04/07: buf currently PAGE_SIZE, need 9 chars per 32 bits. */

    BUILD_BUG_ON((NR_CPUS/32 * 9) > (PAGE_SIZE-1));

​

    if (!alloc_cpumask_var(&mask, GFP_KERNEL))

        return 0;

​

    cpumask_and(mask, cpumask_of_node(node_dev->dev.id), cpu_online_mask);

    n = cpumap_print_to_pagebuf(list, buf, mask);

    free_cpumask_var(mask);

​

    return n;

}

​

static inline ssize_t node_read_cpumask(struct device *dev,

                struct device_attribute *attr, char *buf)

{

    return node_read_cpumap(dev, false, buf);

}

static inline ssize_t node_read_cpulist(struct device *dev,

                struct device_attribute *attr, char *buf)

{

    return node_read_cpumap(dev, true, buf);

}

​

static DEVICE_ATTR(cpumap,  S_IRUGO, node_read_cpumask, NULL);

static DEVICE_ATTR(cpulist, S_IRUGO, node_read_cpulist, NULL);

​

#define K(x) ((x) << (PAGE_SHIFT - 10))

static ssize_t node_read_meminfo(struct device *dev,