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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); |