summaryrefslogtreecommitdiffstats
path: root/arch/tile/lib/uaccess.c
blob: 030abe3ee4f1da38380cd592a7405fdefd346c36 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
/*
 * 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);