| /* |
| * Copyright 2010 Kshitij Kulshreshtha <kkhere.geo@gmail.com> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| * |
| * Compatibility file for Linux wireless for kernels 2.6.35. |
| */ |
| |
| #include <linux/compat.h> |
| #include <linux/ctype.h> |
| |
| /** |
| * hex_to_bin - convert a hex digit to its real value |
| * @ch: ascii character represents hex digit |
| * |
| * hex_to_bin() converts one hex digit to its actual value or -1 in case of bad |
| * input. |
| */ |
| int compat_hex_to_bin(char ch) |
| { |
| if ((ch >= '0') && (ch <= '9')) |
| return ch - '0'; |
| ch = tolower(ch); |
| if ((ch >= 'a') && (ch <= 'f')) |
| return ch - 'a' + 10; |
| return -1; |
| } |
| EXPORT_SYMBOL(compat_hex_to_bin); |
| |
| /** |
| * noop_llseek - No Operation Performed llseek implementation |
| * @file: file structure to seek on |
| * @offset: file offset to seek to |
| * @origin: type of seek |
| * |
| * This is an implementation of ->llseek useable for the rare special case when |
| * userspace expects the seek to succeed but the (device) file is actually not |
| * able to perform the seek. In this case you use noop_llseek() instead of |
| * falling back to the default implementation of ->llseek. |
| */ |
| loff_t noop_llseek(struct file *file, loff_t offset, int origin) |
| { |
| return file->f_pos; |
| } |
| EXPORT_SYMBOL(noop_llseek); |
| |