// 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"
#include "trace.h"
struct devres {
struct devres_node node;
dr_release_t release;
/*
* 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_DMA_MINALIGN for data[] which will force the same
* alignment for struct devres when allocated by kmalloc().
*/
u8 __aligned(ARCH_DMA_MINALIGN) data[];
};
struct devres_group {
struct devres_node node[2];
void *id;
int color;
/* -- 8 pointers */
};
void devres_node_init(struct devres_node *node,
dr_node_release_t release,
dr_node_free_t free_node)
{
INIT_LIST_HEAD(&node->entry);
node->release = release;
node->free_node = free_node;
}
static inline void free_node(struct devres_node *node)
{
node->free_node(node);
}
void devres_set_node_dbginfo(struct devres_node *node, const char *name,
size_t size)
{
node->name = name;
node->size = size;
}
#ifdef CONFIG_DEBUG_DEVRES
static int log_devres = 0;
module_param_named(log, log_devres, int, S_IRUGO | S_IWUSR);
static void devres_dbg(struct device *dev, struct devres_node *node,
const char *op)
{
if (unlikely(log_devres))
dev_err(dev, "DEVRES %3s %p %s (%zu bytes)\n",
op, node, node->name, node->size);
}
#else /* CONFIG_DEBUG_DEVRES */
#define devres_dbg(dev, node, op) do {} while (0)
#endif /* CONFIG_DEBUG_DEVRES */
static void devres_log(struct device *dev, struct devres_node *node,
