include/linux/dev_printk.h

Source file repositories/reference/linux-study-clean/include/linux/dev_printk.h

File Facts

System
Linux kernel
Corpus path
include/linux/dev_printk.h
Extension
.h
Size
9975 bytes
Lines
290
Domain
Core OS
Bucket
Core Kernel Interface
Inferred role
Core OS: implementation source
Status
source implementation candidate

Why This File Exists

Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.

Dependency Surface

Detected Declarations

Annotated Snippet

struct dev_printk_info {
	char subsystem[PRINTK_INFO_SUBSYSTEM_LEN];
	char device[PRINTK_INFO_DEVICE_LEN];
};

#ifdef CONFIG_PRINTK

__printf(3, 0) __cold
int dev_vprintk_emit(int level, const struct device *dev,
		     const char *fmt, va_list args);
__printf(3, 4) __cold
int dev_printk_emit(int level, const struct device *dev, const char *fmt, ...);

__printf(3, 4) __cold
void _dev_printk(const char *level, const struct device *dev,
		 const char *fmt, ...);
__printf(2, 3) __cold
void _dev_emerg(const struct device *dev, const char *fmt, ...);
__printf(2, 3) __cold
void _dev_alert(const struct device *dev, const char *fmt, ...);
__printf(2, 3) __cold
void _dev_crit(const struct device *dev, const char *fmt, ...);
__printf(2, 3) __cold
void _dev_err(const struct device *dev, const char *fmt, ...);
__printf(2, 3) __cold
void _dev_warn(const struct device *dev, const char *fmt, ...);
__printf(2, 3) __cold
void _dev_notice(const struct device *dev, const char *fmt, ...);
__printf(2, 3) __cold
void _dev_info(const struct device *dev, const char *fmt, ...);

#else

static inline __printf(3, 0)
int dev_vprintk_emit(int level, const struct device *dev,
		     const char *fmt, va_list args)
{ return 0; }
static inline __printf(3, 4)
int dev_printk_emit(int level, const struct device *dev, const char *fmt, ...)
{ return 0; }

static inline void __dev_printk(const char *level, const struct device *dev,
				struct va_format *vaf)
{}
static inline __printf(3, 4)
void _dev_printk(const char *level, const struct device *dev,
		 const char *fmt, ...)
{}

static inline __printf(2, 3)
void _dev_emerg(const struct device *dev, const char *fmt, ...)
{}
static inline __printf(2, 3)
void _dev_crit(const struct device *dev, const char *fmt, ...)
{}
static inline __printf(2, 3)
void _dev_alert(const struct device *dev, const char *fmt, ...)
{}
static inline __printf(2, 3)
void _dev_err(const struct device *dev, const char *fmt, ...)
{}
static inline __printf(2, 3)
void _dev_warn(const struct device *dev, const char *fmt, ...)
{}
static inline __printf(2, 3)
void _dev_notice(const struct device *dev, const char *fmt, ...)
{}
static inline __printf(2, 3)
void _dev_info(const struct device *dev, const char *fmt, ...)
{}

#endif

/*
 * Need to take variadic arguments even though we don't use them, as dev_fmt()
 * may only just have been expanded and may result in multiple arguments.
 */
#define dev_printk_index_emit(level, fmt, ...) \
	printk_index_subsys_emit("%s %s: ", level, fmt)

#define dev_printk_index_wrap(_p_func, level, dev, fmt, ...)		\
	({								\
		dev_printk_index_emit(level, fmt);			\
		_p_func(dev, fmt, ##__VA_ARGS__);			\
	})

/*
 * Some callsites directly call dev_printk rather than going through the
 * dev_<level> infrastructure, so we need to emit here as well as inside those
 * level-specific macros. Only one index entry will be produced, either way,

Annotation

Implementation Notes