devres.c

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/*
 * Copyright (C) 2008 Freescale Semiconductor, Inc.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version
 * 2 of the License, or (at your option) any later version.
 */

#include <linux/device.h>   /* devres_*(), devm_ioremap_release() */
#include <linux/gfp.h>
#include <linux/io.h>       /* ioremap_prot() */
#include <linux/export.h>   /* EXPORT_SYMBOL() */

void __iomem *devm_ioremap_prot(struct device *dev, resource_size_t offset,
                 size_t size, unsigned long flags)
{
    void __iomem **ptr, *addr;

    ptr = devres_alloc(devm_ioremap_release, sizeof(*ptr), GFP_KERNEL);
    if (!ptr)
        return NULL;

    addr = ioremap_prot(offset, size, flags);
    if (addr) {
        *ptr = addr;
        devres_add(dev, ptr);
    } else
        devres_free(ptr);

    return addr;
}
EXPORT_SYMBOL(devm_ioremap_prot);