[deliverable/linux.git] / arch / tile / lib / uaccess.c

/*
 * Copyright 2010 Tilera Corporation. All Rights Reserved.
 *
 *   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, version 2.
 *
 *   This program is distributed in the hope that it will be useful, but
 *   WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
 *   NON INFRINGEMENT.  See the GNU General Public License for
 *   more details.
 */

#include <linux/uaccess.h>
#include <linux/module.h>

int __range_ok(unsigned long addr, unsigned long size)
{
	unsigned long limit = current_thread_info()->addr_limit.seg;
	return !((addr < limit && size <= limit - addr) ||
		 is_arch_mappable_range(addr, size));
}
EXPORT_SYMBOL(__range_ok);
Commit	Line	Data
867e359b CM	1	/*
	2	* Copyright 2010 Tilera Corporation. All Rights Reserved.
	3	*
	4	* This program is free software; you can redistribute it and/or
	5	* modify it under the terms of the GNU General Public License
	6	* as published by the Free Software Foundation, version 2.
	7	*
	8	* This program is distributed in the hope that it will be useful, but
	9	* WITHOUT ANY WARRANTY; without even the implied warranty of
	10	* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
	11	* NON INFRINGEMENT. See the GNU General Public License for
	12	* more details.
	13	*/
	14
	15	#include <linux/uaccess.h>
	16	#include <linux/module.h>
	17
	18	int __range_ok(unsigned long addr, unsigned long size)
	19	{
	20	unsigned long limit = current_thread_info()->addr_limit.seg;
867e359b CM	21	return !((addr < limit && size <= limit - addr) \|\|
	22	is_arch_mappable_range(addr, size));
	23	}
	24	EXPORT_SYMBOL(__range_ok);