projects / mirror_ovs.git / blame
| Commit | Line | Data |
|---|---|---|
| 2be0b371 JG |
1 | #ifndef __LINUX_KCONFIG_WRAPPER_H |
| 2 | #define __LINUX_KCONFIG_WRAPPER_H | |
| 3 | ||
| 4 | #include <linux/version.h> | |
| 5 | ||
| 6 | #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,37) | |
| 7 | #define CONFIG_NET_IPGRE_DEMUX 1 | |
| 8 | #endif | |
| 9 | ||
| 10 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(3,1,0) | |
| 11 | #include_next <linux/kconfig.h> | |
| 12 | #endif | |
| 13 | ||
| 14 | #ifndef IS_ENABLED | |
| 15 | ||
| 16 | /* | |
| 17 | * Helper macros to use CONFIG_ options in C/CPP expressions. Note that | |
| 18 | * these only work with boolean and tristate options. | |
| 19 | */ | |
| 20 | ||
| 21 | /* | |
| 22 | * Getting something that works in C and CPP for an arg that may or may | |
| 23 | * not be defined is tricky. Here, if we have "#define CONFIG_BOOGER 1" | |
| 24 | * we match on the placeholder define, insert the "0," for arg1 and generate | |
| 25 | * the triplet (0, 1, 0). Then the last step cherry picks the 2nd arg (a one). | |
| 26 | * When CONFIG_BOOGER is not defined, we generate a (... 1, 0) pair, and when | |
| 27 | * the last step cherry picks the 2nd arg, we get a zero. | |
| 28 | */ | |
| 29 | #define __ARG_PLACEHOLDER_1 0, | |
| 30 | #define config_enabled(cfg) _config_enabled(cfg) | |
| 31 | #define _config_enabled(value) __config_enabled(__ARG_PLACEHOLDER_##value) | |
| 32 | #define __config_enabled(arg1_or_junk) ___config_enabled(arg1_or_junk 1, 0) | |
| 33 | #define ___config_enabled(__ignored, val, ...) val | |
| 34 | ||
| 35 | /* | |
| 36 | * IS_ENABLED(CONFIG_FOO) evaluates to 1 if CONFIG_FOO is set to 'y' or 'm', | |
| 37 | * 0 otherwise. | |
| 38 | * | |
| 39 | */ | |
| 40 | #define IS_ENABLED(option) \ | |
| 41 | (config_enabled(option) || config_enabled(option##_MODULE)) | |
| 42 | ||
| 43 | /* | |
| 44 | * IS_BUILTIN(CONFIG_FOO) evaluates to 1 if CONFIG_FOO is set to 'y', 0 | |
| 45 | * otherwise. For boolean options, this is equivalent to | |
| 46 | * IS_ENABLED(CONFIG_FOO). | |
| 47 | */ | |
| 48 | #define IS_BUILTIN(option) config_enabled(option) | |
| 49 | ||
| 50 | /* | |
| 51 | * IS_MODULE(CONFIG_FOO) evaluates to 1 if CONFIG_FOO is set to 'm', 0 | |
| 52 | * otherwise. | |
| 53 | */ | |
| 54 | #define IS_MODULE(option) config_enabled(option##_MODULE) | |
| 55 | ||
| 56 | #endif /* IS_ENABLED */ | |
| 57 | #endif /* __LINUX_KCONFIG_WRAPER_H */ |