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Dynamic debug: Add more flags

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Add flags that allow the user to specify via debugfs whether or not the
module name, function name, line number and/or thread ID have to be
included in the printed message.

Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Cc: Greg Banks <gnb@fmeh.org>
Cc: Konrad Rzeszutek Wilk <konrad@darnok.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Bart Van Assche 2011-01-23 17:17:24 +01:00 • committed by Greg Kroah-Hartman
parent 9b99b7f84e
commit 8ba6ebf583
3 changed files with 68 additions and 12 deletions
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8
include/linux/dynamic_debug.h
View file

@ -31,6 +31,10 @@ struct _ddebug {
* writes commands to <debugfs>/dynamic_debug/control
*/
#define _DPRINTK_FLAGS_PRINT (1<<0) /* printk() a message using the format */
#define _DPRINTK_FLAGS_INCL_MODNAME (1<<1)
#define _DPRINTK_FLAGS_INCL_FUNCNAME (1<<2)
#define _DPRINTK_FLAGS_INCL_LINENO (1<<3)
#define _DPRINTK_FLAGS_INCL_TID (1<<4)
#define _DPRINTK_FLAGS_DEFAULT 0
unsigned int flags:8;
char enabled;
@ -42,6 +46,8 @@ int ddebug_add_module(struct _ddebug *tab, unsigned int n,
#if defined(CONFIG_DYNAMIC_DEBUG)
extern int ddebug_remove_module(const char *mod_name);
extern int __dynamic_pr_debug(struct _ddebug *descriptor, const char *fmt, ...)
__attribute__ ((format (printf, 2, 3)));
#define dynamic_pr_debug(fmt, ...) do { \
static struct _ddebug descriptor \
@ -50,7 +56,7 @@ extern int ddebug_remove_module(const char *mod_name);
{ KBUILD_MODNAME, __func__, __FILE__, fmt, __LINE__, \
_DPRINTK_FLAGS_DEFAULT }; \
if (unlikely(descriptor.enabled)) \
printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__); \
__dynamic_pr_debug(&descriptor, pr_fmt(fmt), ##__VA_ARGS__); \
} while (0)