Root/
1 | #ifndef _DYNAMIC_DEBUG_H |
2 | #define _DYNAMIC_DEBUG_H |
3 | |
4 | #include <linux/jump_label.h> |
5 | |
6 | /* dynamic_printk_enabled, and dynamic_printk_enabled2 are bitmasks in which |
7 | * bit n is set to 1 if any modname hashes into the bucket n, 0 otherwise. They |
8 | * use independent hash functions, to reduce the chance of false positives. |
9 | */ |
10 | extern long long dynamic_debug_enabled; |
11 | extern long long dynamic_debug_enabled2; |
12 | |
13 | /* |
14 | * An instance of this structure is created in a special |
15 | * ELF section at every dynamic debug callsite. At runtime, |
16 | * the special section is treated as an array of these. |
17 | */ |
18 | struct _ddebug { |
19 | /* |
20 | * These fields are used to drive the user interface |
21 | * for selecting and displaying debug callsites. |
22 | */ |
23 | const char *modname; |
24 | const char *function; |
25 | const char *filename; |
26 | const char *format; |
27 | unsigned int lineno:24; |
28 | /* |
29 | * The flags field controls the behaviour at the callsite. |
30 | * The bits here are changed dynamically when the user |
31 | * writes commands to <debugfs>/dynamic_debug/control |
32 | */ |
33 | #define _DPRINTK_FLAGS_PRINT (1<<0) /* printk() a message using the format */ |
34 | #define _DPRINTK_FLAGS_DEFAULT 0 |
35 | unsigned int flags:8; |
36 | char enabled; |
37 | } __attribute__((aligned(8))); |
38 | |
39 | |
40 | int ddebug_add_module(struct _ddebug *tab, unsigned int n, |
41 | const char *modname); |
42 | |
43 | #if defined(CONFIG_DYNAMIC_DEBUG) |
44 | extern int ddebug_remove_module(const char *mod_name); |
45 | |
46 | #define dynamic_pr_debug(fmt, ...) do { \ |
47 | __label__ do_printk; \ |
48 | __label__ out; \ |
49 | static struct _ddebug descriptor \ |
50 | __used \ |
51 | __attribute__((section("__verbose"), aligned(8))) = \ |
52 | { KBUILD_MODNAME, __func__, __FILE__, fmt, __LINE__, \ |
53 | _DPRINTK_FLAGS_DEFAULT }; \ |
54 | JUMP_LABEL(&descriptor.enabled, do_printk); \ |
55 | goto out; \ |
56 | do_printk: \ |
57 | printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__); \ |
58 | out: ; \ |
59 | } while (0) |
60 | |
61 | |
62 | #define dynamic_dev_dbg(dev, fmt, ...) do { \ |
63 | __label__ do_printk; \ |
64 | __label__ out; \ |
65 | static struct _ddebug descriptor \ |
66 | __used \ |
67 | __attribute__((section("__verbose"), aligned(8))) = \ |
68 | { KBUILD_MODNAME, __func__, __FILE__, fmt, __LINE__, \ |
69 | _DPRINTK_FLAGS_DEFAULT }; \ |
70 | JUMP_LABEL(&descriptor.enabled, do_printk); \ |
71 | goto out; \ |
72 | do_printk: \ |
73 | dev_printk(KERN_DEBUG, dev, fmt, ##__VA_ARGS__); \ |
74 | out: ; \ |
75 | } while (0) |
76 | |
77 | #else |
78 | |
79 | static inline int ddebug_remove_module(const char *mod) |
80 | { |
81 | return 0; |
82 | } |
83 | |
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) |
88 | #endif |
89 | |
90 | #endif |
91 |
Branches:
ben-wpan
ben-wpan-stefan
javiroman/ks7010
jz-2.6.34
jz-2.6.34-rc5
jz-2.6.34-rc6
jz-2.6.34-rc7
jz-2.6.35
jz-2.6.36
jz-2.6.37
jz-2.6.38
jz-2.6.39
jz-3.0
jz-3.1
jz-3.11
jz-3.12
jz-3.13
jz-3.15
jz-3.16
jz-3.18-dt
jz-3.2
jz-3.3
jz-3.4
jz-3.5
jz-3.6
jz-3.6-rc2-pwm
jz-3.9
jz-3.9-clk
jz-3.9-rc8
jz47xx
jz47xx-2.6.38
master
Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9