1 #ifndef _DYNAMIC_DEBUG_H
2 #define _DYNAMIC_DEBUG_H
4 /* dynamic_printk_enabled, and dynamic_printk_enabled2 are bitmasks in which
5 * bit n is set to 1 if any modname hashes into the bucket n, 0 otherwise. They
6 * use independent hash functions, to reduce the chance of false positives.
8 extern long long dynamic_debug_enabled;
9 extern long long dynamic_debug_enabled2;
12 * An instance of this structure is created in a special
13 * ELF section at every dynamic debug callsite. At runtime,
14 * the special section is treated as an array of these.
18 * These fields are used to drive the user interface
19 * for selecting and displaying debug callsites.
25 unsigned int lineno:24;
27 * The flags field controls the behaviour at the callsite.
28 * The bits here are changed dynamically when the user
29 * writes commands to <debugfs>/dynamic_debug/control
31 #define _DPRINTK_FLAGS_PRINT (1<<0) /* printk() a message using the format */
32 #define _DPRINTK_FLAGS_INCL_MODNAME (1<<1)
33 #define _DPRINTK_FLAGS_INCL_FUNCNAME (1<<2)
34 #define _DPRINTK_FLAGS_INCL_LINENO (1<<3)
35 #define _DPRINTK_FLAGS_INCL_TID (1<<4)
36 #define _DPRINTK_FLAGS_DEFAULT 0
39 } __attribute__((aligned(8)));
42 int ddebug_add_module(struct _ddebug *tab, unsigned int n,
45 #if defined(CONFIG_DYNAMIC_DEBUG)
46 extern int ddebug_remove_module(const char *mod_name);
47 extern int __dynamic_pr_debug(struct _ddebug *descriptor, const char *fmt, ...)
48 __attribute__ ((format (printf, 2, 3)));
52 extern int __dynamic_dev_dbg(struct _ddebug *descriptor,
53 const struct device *dev,
55 __attribute__ ((format (printf, 3, 4)));
57 #define dynamic_pr_debug(fmt, ...) do { \
58 static struct _ddebug descriptor \
60 __attribute__((section("__verbose"), aligned(8))) = \
61 { KBUILD_MODNAME, __func__, __FILE__, fmt, __LINE__, \
62 _DPRINTK_FLAGS_DEFAULT }; \
63 if (unlikely(descriptor.enabled)) \
64 __dynamic_pr_debug(&descriptor, pr_fmt(fmt), ##__VA_ARGS__); \
67 #define dynamic_dev_dbg(dev, fmt, ...) do { \
68 static struct _ddebug descriptor \
70 __attribute__((section("__verbose"), aligned(8))) = \
71 { KBUILD_MODNAME, __func__, __FILE__, fmt, __LINE__, \
72 _DPRINTK_FLAGS_DEFAULT }; \
73 if (unlikely(descriptor.enabled)) \
74 __dynamic_dev_dbg(&descriptor, dev, fmt, ##__VA_ARGS__); \
79 static inline int ddebug_remove_module(const char *mod)
84 #define dynamic_pr_debug(fmt, ...) \
85 do { if (0) printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__); } while (0)
86 #define dynamic_dev_dbg(dev, fmt, ...) \
87 do { if (0) dev_printk(KERN_DEBUG, dev, fmt, ##__VA_ARGS__); } while (0)