projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 346e15be JB |
1 | #ifndef _DYNAMIC_PRINTK_H |
| 2 | #define _DYNAMIC_PRINTK_H | |
| 3 | ||
| 4 | #define DYNAMIC_DEBUG_HASH_BITS 6 | |
| 5 | #define DEBUG_HASH_TABLE_SIZE (1 << DYNAMIC_DEBUG_HASH_BITS) | |
| 6 | ||
| 7 | #define TYPE_BOOLEAN 1 | |
| 8 | ||
| 9 | #define DYNAMIC_ENABLED_ALL 0 | |
| 10 | #define DYNAMIC_ENABLED_NONE 1 | |
| 11 | #define DYNAMIC_ENABLED_SOME 2 | |
| 12 | ||
| 13 | extern int dynamic_enabled; | |
| 14 | ||
| 15 | /* dynamic_printk_enabled, and dynamic_printk_enabled2 are bitmasks in which | |
| 16 | * bit n is set to 1 if any modname hashes into the bucket n, 0 otherwise. They | |
| 17 | * use independent hash functions, to reduce the chance of false positives. | |
| 18 | */ | |
| 19 | extern long long dynamic_printk_enabled; | |
| 20 | extern long long dynamic_printk_enabled2; | |
| 21 | ||
| 22 | struct mod_debug { | |
| 23 | char *modname; | |
| 24 | char *logical_modname; | |
| 25 | char *flag_names; | |
| 26 | int type; | |
| 27 | int hash; | |
| 28 | int hash2; | |
| 29 | } __attribute__((aligned(8))); | |
| 30 | ||
| 31 | int register_dynamic_debug_module(char *mod_name, int type, char *share_name, | |
| 32 | char *flags, int hash, int hash2); | |
| 33 | ||
| 34 | #if defined(CONFIG_DYNAMIC_PRINTK_DEBUG) | |
| 35 | extern int unregister_dynamic_debug_module(char *mod_name); | |
| 36 | extern int __dynamic_dbg_enabled_helper(char *modname, int type, | |
| 37 | int value, int hash); | |
| 38 | ||
| 39 | #define __dynamic_dbg_enabled(module, type, value, level, hash) ({ \ | |
| 40 | int __ret = 0; \ | |
| 41 | if (unlikely((dynamic_printk_enabled & (1LL << DEBUG_HASH)) && \ | |
| 42 | (dynamic_printk_enabled2 & (1LL << DEBUG_HASH2)))) \ | |
| 43 | __ret = __dynamic_dbg_enabled_helper(module, type, \ | |
| 44 | value, hash);\ | |
| 45 | __ret; }) | |
| 46 | ||
| 47 | #define dynamic_pr_debug(fmt, ...) do { \ | |
| 48 | static char mod_name[] \ | |
| 49 | __attribute__((section("__verbose_strings"))) \ | |
| 50 | = KBUILD_MODNAME; \ | |
| 51 | static struct mod_debug descriptor \ | |
| 52 | __used \ | |
| 53 | __attribute__((section("__verbose"), aligned(8))) = \ | |
| 54 | { mod_name, mod_name, NULL, TYPE_BOOLEAN, DEBUG_HASH, DEBUG_HASH2 };\ | |
| 55 | if (__dynamic_dbg_enabled(KBUILD_MODNAME, TYPE_BOOLEAN, \ | |
| 56 | 0, 0, DEBUG_HASH)) \ | |
| 57 | printk(KERN_DEBUG KBUILD_MODNAME ":" fmt, \ | |
| 58 | ##__VA_ARGS__); \ | |
| 59 | } while (0) | |
| 60 | ||
| 61 | #define dynamic_dev_dbg(dev, format, ...) do { \ | |
| 62 | static char mod_name[] \ | |
| 63 | __attribute__((section("__verbose_strings"))) \ | |
| 64 | = KBUILD_MODNAME; \ | |
| 65 | static struct mod_debug descriptor \ | |
| 66 | __used \ | |
| 67 | __attribute__((section("__verbose"), aligned(8))) = \ | |
| 68 | { mod_name, mod_name, NULL, TYPE_BOOLEAN, DEBUG_HASH, DEBUG_HASH2 };\ | |
| 69 | if (__dynamic_dbg_enabled(KBUILD_MODNAME, TYPE_BOOLEAN, \ | |
| 70 | 0, 0, DEBUG_HASH)) \ | |
| 71 | dev_printk(KERN_DEBUG, dev, \ | |
| 72 | KBUILD_MODNAME ": " format, \ | |
| 73 | ##__VA_ARGS__); \ | |
| 74 | } while (0) | |
| 75 | ||
| 76 | #else | |
| 77 | ||
| 78 | static inline int unregister_dynamic_debug_module(const char *mod_name) | |
| 79 | { | |
| 80 | return 0; | |
| 81 | } | |
| 82 | static inline int __dynamic_dbg_enabled_helper(char *modname, int type, | |
| 83 | int value, int hash) | |
| 84 | { | |
| 85 | return 0; | |
| 86 | } | |
| 87 | ||
| 88 | #define __dynamic_dbg_enabled(module, type, value, level, hash) ({ 0; }) | |
| 89 | #define dynamic_pr_debug(fmt, ...) do { } while (0) | |
| 90 | #define dynamic_dev_dbg(dev, format, ...) do { } while (0) | |
| 91 | #endif | |
| 92 | ||
| 93 | #endif |