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dynamic_debug: Add __dynamic_dev_dbg

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Unlike dynamic_pr_debug, dynamic uses of dev_dbg can not
currently add task_pid/KBUILD_MODNAME/__func__/__LINE__
to selected debug output.

Add a new function similar to dynamic_pr_debug to
optionally emit these prefixes.

Cc: Aloisio Almeida <aloisio.almeida@openbossa.org>
Noticed-by: Aloisio Almeida <aloisio.almeida@openbossa.org>
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Jason Baron <jbaron@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Joe Perches 2011-08-11 14:36:21 -04:00 committed by Greg Kroah-Hartman
parent 25b8a88c10
commit cbc4663552
4 changed files with 54 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
drivers/base/core.c
View File

@ -1764,8 +1764,8 @@ void device_shutdown(void)
#ifdef CONFIG_PRINTK
static int __dev_printk(const char *level, const struct device *dev,
struct va_format *vaf)
int __dev_printk(const char *level, const struct device *dev,
struct va_format *vaf)
{
if (!dev)
return printk("%s(NULL device *): %pV", level, vaf);
@ -1773,6 +1773,7 @@ static int __dev_printk(const char *level, const struct device *dev,
return printk("%s%s %s: %pV",
level, dev_driver_string(dev), dev_name(dev), vaf);
}
EXPORT_SYMBOL(__dev_printk);
int dev_printk(const char *level, const struct device *dev,
const char *fmt, ...)

5
include/linux/device.h
View File

@ -785,6 +785,8 @@ extern const char *dev_driver_string(const struct device *dev);
#ifdef CONFIG_PRINTK
extern int __dev_printk(const char *level, const struct device *dev,
struct va_format *vaf);
extern int dev_printk(const char *level, const struct device *dev,
const char *fmt, ...)
__attribute__ ((format (printf, 3, 4)));
@ -805,6 +807,9 @@ extern int _dev_info(const struct device *dev, const char *fmt, ...)
#else
static inline int __dev_printk(const char *level, const struct device *dev,
struct va_format *vaf)
{ return 0; }
static inline int dev_printk(const char *level, const struct device *dev,
const char *fmt, ...)
__attribute__ ((format (printf, 3, 4)));

10
include/linux/dynamic_debug.h
View File

@ -47,6 +47,13 @@ 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)));
struct device;
extern int __dynamic_dev_dbg(struct _ddebug *descriptor,
const struct device *dev,
const char *fmt, ...)
__attribute__ ((format (printf, 3, 4)));
#define dynamic_pr_debug(fmt, ...) do { \
static struct _ddebug descriptor \
__used \
@ -57,7 +64,6 @@ extern int __dynamic_pr_debug(struct _ddebug *descriptor, const char *fmt, ...)
__dynamic_pr_debug(&descriptor, pr_fmt(fmt), ##__VA_ARGS__); \
} while (0)
#define dynamic_dev_dbg(dev, fmt, ...) do { \
static struct _ddebug descriptor \
__used \
@ -65,7 +71,7 @@ extern int __dynamic_pr_debug(struct _ddebug *descriptor, const char *fmt, ...)
{ KBUILD_MODNAME, __func__, __FILE__, fmt, __LINE__, \
_DPRINTK_FLAGS_DEFAULT }; \
if (unlikely(descriptor.enabled)) \
dev_printk(KERN_DEBUG, dev, fmt, ##__VA_ARGS__); \
__dynamic_dev_dbg(&descriptor, dev, fmt, ##__VA_ARGS__); \
} while (0)
#else

38
lib/dynamic_debug.c
View File

@ -30,6 +30,7 @@
#include <linux/jump_label.h>
#include <linux/hardirq.h>
#include <linux/sched.h>
#include <linux/device.h>
extern struct _ddebug __start___verbose[];
extern struct _ddebug __stop___verbose[];
@ -456,6 +457,43 @@ int __dynamic_pr_debug(struct _ddebug *descriptor, const char *fmt, ...)
}
EXPORT_SYMBOL(__dynamic_pr_debug);
int __dynamic_dev_dbg(struct _ddebug *descriptor,
const struct device *dev, const char *fmt, ...)
{
struct va_format vaf;
va_list args;
int res;
BUG_ON(!descriptor);
BUG_ON(!fmt);
va_start(args, fmt);
vaf.fmt = fmt;
vaf.va = &args;
res = printk(KERN_DEBUG);
if (descriptor->flags & _DPRINTK_FLAGS_INCL_TID) {
if (in_interrupt())
res += printk(KERN_CONT "<intr> ");
else
res += printk(KERN_CONT "[%d] ", task_pid_vnr(current));
}
if (descriptor->flags & _DPRINTK_FLAGS_INCL_MODNAME)
res += printk(KERN_CONT "%s:", descriptor->modname);
if (descriptor->flags & _DPRINTK_FLAGS_INCL_FUNCNAME)
res += printk(KERN_CONT "%s:", descriptor->function);
if (descriptor->flags & _DPRINTK_FLAGS_INCL_LINENO)
res += printk(KERN_CONT "%d ", descriptor->lineno);
res += __dev_printk(KERN_CONT, dev, &vaf);
va_end(args);
return res;
}
EXPORT_SYMBOL(__dynamic_dev_dbg);
static __initdata char ddebug_setup_string[1024];
static __init int ddebug_setup_query(char *str)
{