linux-imx

// SPDX-License-Identifier: GPL-2.0

/*

 * drivers/base/devres.c - device resource management

 *

 * Copyright (c) 2006  SUSE Linux Products GmbH

 * Copyright (c) 2006  Tejun Heo <teheo@suse.de>

 */

​

#include <linux/device.h>

#include <linux/module.h>

#include <linux/slab.h>

#include <linux/percpu.h>

​

#include <asm/sections.h>

​

#include "base.h"

​

struct devres_node {

    struct list_head        entry;

    dr_release_t            release;

#ifdef CONFIG_DEBUG_DEVRES

    const char          *name;

    size_t              size;

#endif

};

​

struct devres {

    struct devres_node      node;

    /*

     * Some archs want to perform DMA into kmalloc caches

     * and need a guaranteed alignment larger than

     * the alignment of a 64-bit integer.

     * Thus we use ARCH_KMALLOC_MINALIGN here and get exactly the same

     * buffer alignment as if it was allocated by plain kmalloc().

     */

    u8 __aligned(ARCH_KMALLOC_MINALIGN) data[];

};

​

struct devres_group {

    struct devres_node      node[2];

    void                *id;

    int             color;

    /* -- 8 pointers */

};

​

#ifdef CONFIG_DEBUG_DEVRES

static int log_devres = 0;

module_param_named(log, log_devres, int, S_IRUGO | S_IWUSR);

​

static void set_node_dbginfo(struct devres_node *node, const char *name,

                 size_t size)

{

    node->name = name;

    node->size = size;

}

​

static void devres_log(struct device *dev, struct devres_node *node,

               const char *op)

{

    if (unlikely(log_devres))

        dev_err(dev, "DEVRES %3s %p %s (%lu bytes)\n",

            op, node, node->name, (unsigned long)node->size);

}