| 1 | /* |
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| 2 | compar.h - A Linux module for reading sensor data. |
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| 3 | Copyright (c) 1998 Frodo Looijaard <frodol@dds.nl> |
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| 4 | |
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| 5 | This program is free software; you can redistribute it and/or modify |
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| 6 | it under the terms of the GNU General Public License as published by |
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| 7 | the Free Software Foundation; either version 2 of the License, or |
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| 8 | (at your option) any later version. |
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| 9 | |
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| 10 | This program is distributed in the hope that it will be useful, |
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| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 13 | GNU General Public License for more details. |
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| 14 | |
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| 15 | You should have received a copy of the GNU General Public License |
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| 16 | along with this program; if not, write to the Free Software |
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| 17 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
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| 18 | */ |
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| 19 | |
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| 20 | #ifndef SENSORS_COMPAT_H |
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| 21 | #define SENSORS_COMPAT_H |
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| 22 | |
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| 23 | /* This useful macro is not defined in the 2.0 kernels */ |
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| 24 | |
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| 25 | #include <linux/version.h> |
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| 26 | #ifndef KERNEL_VERSION |
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| 27 | #define KERNEL_VERSION(a,b,c) (((a) << 16) | ((b) << 8) | (c)) |
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| 28 | #endif |
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| 29 | |
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| 30 | #ifdef MODULE |
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| 31 | #include <linux/module.h> |
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| 32 | #ifndef MODULE_AUTHOR |
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| 33 | #define MODULE_AUTHOR(whatever) |
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| 34 | #endif |
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| 35 | #ifndef MODULE_DESCRIPTION |
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| 36 | #define MODULE_DESCRIPTION(whatever) |
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| 37 | #endif |
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| 38 | #endif /* def MODULE */ |
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| 39 | |
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| 40 | /* copy_from/to_usr is called memcpy_from/to_fs in 2.0 kernels; perhaps in |
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| 41 | some early 2.1 kernels too? */ |
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| 42 | #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,1,4)) |
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| 43 | #define copy_from_user memcpy_fromfs |
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| 44 | #define copy_to_user memcpy_tofs |
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| 45 | #endif |
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| 46 | |
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| 47 | /* get_user was redefined in 2.1 kernels to use two arguments, and returns |
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| 48 | an error code */ |
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| 49 | #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,1,4)) |
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| 50 | #define get_user_data(to,from) ((to) = get_user(from),0) |
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| 51 | #else |
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| 52 | #define get_user_data(to,from) get_user(to,from) |
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| 53 | #endif |
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| 54 | |
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| 55 | |
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| 56 | #endif /* SENSORS_COMPAT_H */ |
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