[deliverable/linux.git] / include / linux / printk.h

#ifndef __KERNEL_PRINTK__
#define __KERNEL_PRINTK__

#include <stdarg.h>
#include <linux/init.h>
#include <linux/kern_levels.h>
#include <linux/linkage.h>
#include <linux/cache.h>

extern const char linux_banner[];
extern const char linux_proc_banner[];

static inline int printk_get_level(const char *buffer)
{
	if (buffer[0] == KERN_SOH_ASCII && buffer[1]) {
		switch (buffer[1]) {
		case '0' ... '7':
		case 'd':	/* KERN_DEFAULT */
			return buffer[1];
		}
	}
	return 0;
}

static inline const char *printk_skip_level(const char *buffer)
{
	if (printk_get_level(buffer))
		return buffer + 2;

	return buffer;
}

#define CONSOLE_EXT_LOG_MAX	8192

/* printk's without a loglevel use this.. */
#define MESSAGE_LOGLEVEL_DEFAULT CONFIG_MESSAGE_LOGLEVEL_DEFAULT

/* We show everything that is MORE important than this.. */
#define CONSOLE_LOGLEVEL_SILENT  0 /* Mum's the word */
#define CONSOLE_LOGLEVEL_MIN	 1 /* Minimum loglevel we let people use */
#define CONSOLE_LOGLEVEL_QUIET	 4 /* Shhh ..., when booted with "quiet" */
#define CONSOLE_LOGLEVEL_DEFAULT 7 /* anything MORE serious than KERN_DEBUG */
#define CONSOLE_LOGLEVEL_DEBUG	10 /* issue debug messages */
#define CONSOLE_LOGLEVEL_MOTORMOUTH 15	/* You can't shut this one up */

extern int console_printk[];

#define console_loglevel (console_printk[0])
#define default_message_loglevel (console_printk[1])
#define minimum_console_loglevel (console_printk[2])
#define default_console_loglevel (console_printk[3])

static inline void console_silent(void)
{
	console_loglevel = CONSOLE_LOGLEVEL_SILENT;
}

static inline void console_verbose(void)
{
	if (console_loglevel)
		console_loglevel = CONSOLE_LOGLEVEL_MOTORMOUTH;
}

struct va_format {
	const char *fmt;
	va_list *va;
};

/*
 * FW_BUG
 * Add this to a message where you are sure the firmware is buggy or behaves
 * really stupid or out of spec. Be aware that the responsible BIOS developer
 * should be able to fix this issue or at least get a concrete idea of the
 * problem by reading your message without the need of looking at the kernel
 * code.
 *
 * Use it for definite and high priority BIOS bugs.
 *
 * FW_WARN
 * Use it for not that clear (e.g. could the kernel messed up things already?)
 * and medium priority BIOS bugs.
 *
 * FW_INFO
 * Use this one if you want to tell the user or vendor about something
 * suspicious, but generally harmless related to the firmware.
 *
 * Use it for information or very low priority BIOS bugs.
 */
#define FW_BUG		"[Firmware Bug]: "
#define FW_WARN		"[Firmware Warn]: "
#define FW_INFO		"[Firmware Info]: "

/*
 * HW_ERR
 * Add this to a message for hardware errors, so that user can report
 * it to hardware vendor instead of LKML or software vendor.
 */
#define HW_ERR		"[Hardware Error]: "

/*
 * DEPRECATED
 * Add this to a message whenever you want to warn user space about the use
 * of a deprecated aspect of an API so they can stop using it
 */
#define DEPRECATED	"[Deprecated]: "

/*
 * Dummy printk for disabled debugging statements to use whilst maintaining
 * gcc's format checking.
 */
#define no_printk(fmt, ...)			\
do {						\
	if (0)					\
		printk(fmt, ##__VA_ARGS__);	\
} while (0)

#ifdef CONFIG_EARLY_PRINTK
extern asmlinkage __printf(1, 2)
void early_printk(const char *fmt, ...);
#else
static inline __printf(1, 2) __cold
void early_printk(const char *s, ...) { }
#endif

#ifdef CONFIG_PRINTK_NMI
extern void printk_nmi_init(void);
extern void printk_nmi_enter(void);
extern void printk_nmi_exit(void);
extern void printk_nmi_flush(void);
extern void printk_nmi_flush_on_panic(void);
#else
static inline void printk_nmi_init(void) { }
static inline void printk_nmi_enter(void) { }
static inline void printk_nmi_exit(void) { }
static inline void printk_nmi_flush(void) { }
static inline void printk_nmi_flush_on_panic(void) { }
#endif /* PRINTK_NMI */

#ifdef CONFIG_PRINTK
asmlinkage __printf(5, 0)
int vprintk_emit(int facility, int level,
		 const char *dict, size_t dictlen,
		 const char *fmt, va_list args);

asmlinkage __printf(1, 0)
int vprintk(const char *fmt, va_list args);

asmlinkage __printf(5, 6) __cold
int printk_emit(int facility, int level,
		const char *dict, size_t dictlen,
		const char *fmt, ...);

asmlinkage __printf(1, 2) __cold
int printk(const char *fmt, ...);

/*
 * Special printk facility for scheduler/timekeeping use only, _DO_NOT_USE_ !
 */
__printf(1, 2) __cold int printk_deferred(const char *fmt, ...);

/*
 * Please don't use printk_ratelimit(), because it shares ratelimiting state
 * with all other unrelated printk_ratelimit() callsites.  Instead use
 * printk_ratelimited() or plain old __ratelimit().
 */
extern int __printk_ratelimit(const char *func);
#define printk_ratelimit() __printk_ratelimit(__func__)
extern bool printk_timed_ratelimit(unsigned long *caller_jiffies,
				   unsigned int interval_msec);

extern int printk_delay_msec;
extern int dmesg_restrict;
extern int kptr_restrict;

extern void wake_up_klogd(void);

char *log_buf_addr_get(void);
u32 log_buf_len_get(void);
void log_buf_kexec_setup(void);
void __init setup_log_buf(int early);
__printf(1, 2) void dump_stack_set_arch_desc(const char *fmt, ...);
void dump_stack_print_info(const char *log_lvl);
void show_regs_print_info(const char *log_lvl);
#else
static inline __printf(1, 0)
int vprintk(const char *s, va_list args)
{
	return 0;
}
static inline __printf(1, 2) __cold
int printk(const char *s, ...)
{
	return 0;
}
static inline __printf(1, 2) __cold
int printk_deferred(const char *s, ...)
{
	return 0;
}
static inline int printk_ratelimit(void)
{
	return 0;
}
static inline bool printk_timed_ratelimit(unsigned long *caller_jiffies,
					  unsigned int interval_msec)
{
	return false;
}

static inline void wake_up_klogd(void)
{
}

static inline char *log_buf_addr_get(void)
{
	return NULL;
}

static inline u32 log_buf_len_get(void)
{
	return 0;
}

static inline void log_buf_kexec_setup(void)
{
}

static inline void setup_log_buf(int early)
{
}

static inline __printf(1, 2) void dump_stack_set_arch_desc(const char *fmt, ...)
{
}

static inline void dump_stack_print_info(const char *log_lvl)
{
}

static inline void show_regs_print_info(const char *log_lvl)
{
}
#endif

extern asmlinkage void dump_stack(void) __cold;

#ifndef pr_fmt
#define pr_fmt(fmt) fmt
#endif

/*
 * These can be used to print at the various log levels.
 * All of these will print unconditionally, although note that pr_debug()
 * and other debug macros are compiled out unless either DEBUG is defined
 * or CONFIG_DYNAMIC_DEBUG is set.
 */
#define pr_emerg(fmt, ...) \
	printk(KERN_EMERG pr_fmt(fmt), ##__VA_ARGS__)
#define pr_alert(fmt, ...) \
	printk(KERN_ALERT pr_fmt(fmt), ##__VA_ARGS__)
#define pr_crit(fmt, ...) \
	printk(KERN_CRIT pr_fmt(fmt), ##__VA_ARGS__)
#define pr_err(fmt, ...) \
	printk(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__)
#define pr_warning(fmt, ...) \
	printk(KERN_WARNING pr_fmt(fmt), ##__VA_ARGS__)
#define pr_warn pr_warning
#define pr_notice(fmt, ...) \
	printk(KERN_NOTICE pr_fmt(fmt), ##__VA_ARGS__)
#define pr_info(fmt, ...) \
	printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
/*
 * Like KERN_CONT, pr_cont() should only be used when continuing
 * a line with no newline ('\n') enclosed. Otherwise it defaults
 * back to KERN_DEFAULT.
 */
#define pr_cont(fmt, ...) \
	printk(KERN_CONT fmt, ##__VA_ARGS__)

/* pr_devel() should produce zero code unless DEBUG is defined */
#ifdef DEBUG
#define pr_devel(fmt, ...) \
	printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
#else
#define pr_devel(fmt, ...) \
	no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
#endif

#include <linux/dynamic_debug.h>

/* If you are writing a driver, please use dev_dbg instead */
#if defined(CONFIG_DYNAMIC_DEBUG)
/* dynamic_pr_debug() uses pr_fmt() internally so we don't need it here */
#define pr_debug(fmt, ...) \
	dynamic_pr_debug(fmt, ##__VA_ARGS__)
#elif defined(DEBUG)
#define pr_debug(fmt, ...) \
	printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
#else
#define pr_debug(fmt, ...) \
	no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
#endif

/*
 * Print a one-time message (analogous to WARN_ONCE() et al):
 */

#ifdef CONFIG_PRINTK
#define printk_once(fmt, ...)					\
({								\
	static bool __print_once __read_mostly;			\
								\
	if (!__print_once) {					\
		__print_once = true;				\
		printk(fmt, ##__VA_ARGS__);			\
	}							\
})
#define printk_deferred_once(fmt, ...)				\
({								\
	static bool __print_once __read_mostly;			\
								\
	if (!__print_once) {					\
		__print_once = true;				\
		printk_deferred(fmt, ##__VA_ARGS__);		\
	}							\
})
#else
#define printk_once(fmt, ...)					\
	no_printk(fmt, ##__VA_ARGS__)
#define printk_deferred_once(fmt, ...)				\
	no_printk(fmt, ##__VA_ARGS__)
#endif

#define pr_emerg_once(fmt, ...)					\
	printk_once(KERN_EMERG pr_fmt(fmt), ##__VA_ARGS__)
#define pr_alert_once(fmt, ...)					\
	printk_once(KERN_ALERT pr_fmt(fmt), ##__VA_ARGS__)
#define pr_crit_once(fmt, ...)					\
	printk_once(KERN_CRIT pr_fmt(fmt), ##__VA_ARGS__)
#define pr_err_once(fmt, ...)					\
	printk_once(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__)
#define pr_warn_once(fmt, ...)					\
	printk_once(KERN_WARNING pr_fmt(fmt), ##__VA_ARGS__)
#define pr_notice_once(fmt, ...)				\
	printk_once(KERN_NOTICE pr_fmt(fmt), ##__VA_ARGS__)
#define pr_info_once(fmt, ...)					\
	printk_once(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
#define pr_cont_once(fmt, ...)					\
	printk_once(KERN_CONT pr_fmt(fmt), ##__VA_ARGS__)

#if defined(DEBUG)
#define pr_devel_once(fmt, ...)					\
	printk_once(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
#else
#define pr_devel_once(fmt, ...)					\
	no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
#endif

/* If you are writing a driver, please use dev_dbg instead */
#if defined(DEBUG)
#define pr_debug_once(fmt, ...)					\
	printk_once(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
#else
#define pr_debug_once(fmt, ...)					\
	no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
#endif

/*
 * ratelimited messages with local ratelimit_state,
 * no local ratelimit_state used in the !PRINTK case
 */
#ifdef CONFIG_PRINTK
#define printk_ratelimited(fmt, ...)					\
({									\
	static DEFINE_RATELIMIT_STATE(_rs,				\
				      DEFAULT_RATELIMIT_INTERVAL,	\
				      DEFAULT_RATELIMIT_BURST);		\
									\
	if (__ratelimit(&_rs))						\
		printk(fmt, ##__VA_ARGS__);				\
})
#else
#define printk_ratelimited(fmt, ...)					\
	no_printk(fmt, ##__VA_ARGS__)
#endif

#define pr_emerg_ratelimited(fmt, ...)					\
	printk_ratelimited(KERN_EMERG pr_fmt(fmt), ##__VA_ARGS__)
#define pr_alert_ratelimited(fmt, ...)					\
	printk_ratelimited(KERN_ALERT pr_fmt(fmt), ##__VA_ARGS__)
#define pr_crit_ratelimited(fmt, ...)					\
	printk_ratelimited(KERN_CRIT pr_fmt(fmt), ##__VA_ARGS__)
#define pr_err_ratelimited(fmt, ...)					\
	printk_ratelimited(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__)
#define pr_warn_ratelimited(fmt, ...)					\
	printk_ratelimited(KERN_WARNING pr_fmt(fmt), ##__VA_ARGS__)
#define pr_notice_ratelimited(fmt, ...)					\
	printk_ratelimited(KERN_NOTICE pr_fmt(fmt), ##__VA_ARGS__)
#define pr_info_ratelimited(fmt, ...)					\
	printk_ratelimited(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
/* no pr_cont_ratelimited, don't do that... */

#if defined(DEBUG)
#define pr_devel_ratelimited(fmt, ...)					\
	printk_ratelimited(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
#else
#define pr_devel_ratelimited(fmt, ...)					\
	no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
#endif

/* If you are writing a driver, please use dev_dbg instead */
#if defined(CONFIG_DYNAMIC_DEBUG)
/* descriptor check is first to prevent flooding with "callbacks suppressed" */
#define pr_debug_ratelimited(fmt, ...)					\
do {									\
	static DEFINE_RATELIMIT_STATE(_rs,				\
				      DEFAULT_RATELIMIT_INTERVAL,	\
				      DEFAULT_RATELIMIT_BURST);		\
	DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, pr_fmt(fmt));		\
	if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT) &&	\
	    __ratelimit(&_rs))						\
		__dynamic_pr_debug(&descriptor, pr_fmt(fmt), ##__VA_ARGS__);	\
} while (0)
#elif defined(DEBUG)
#define pr_debug_ratelimited(fmt, ...)					\
	printk_ratelimited(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
#else
#define pr_debug_ratelimited(fmt, ...) \
	no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
#endif

extern const struct file_operations kmsg_fops;

enum {
	DUMP_PREFIX_NONE,
	DUMP_PREFIX_ADDRESS,
	DUMP_PREFIX_OFFSET
};
extern int hex_dump_to_buffer(const void *buf, size_t len, int rowsize,
			      int groupsize, char *linebuf, size_t linebuflen,
			      bool ascii);
#ifdef CONFIG_PRINTK
extern void print_hex_dump(const char *level, const char *prefix_str,
			   int prefix_type, int rowsize, int groupsize,
			   const void *buf, size_t len, bool ascii);
#if defined(CONFIG_DYNAMIC_DEBUG)
#define print_hex_dump_bytes(prefix_str, prefix_type, buf, len)	\
	dynamic_hex_dump(prefix_str, prefix_type, 16, 1, buf, len, true)
#else
extern void print_hex_dump_bytes(const char *prefix_str, int prefix_type,
				 const void *buf, size_t len);
#endif /* defined(CONFIG_DYNAMIC_DEBUG) */
#else
static inline void print_hex_dump(const char *level, const char *prefix_str,
				  int prefix_type, int rowsize, int groupsize,
				  const void *buf, size_t len, bool ascii)
{
}
static inline void print_hex_dump_bytes(const char *prefix_str, int prefix_type,
					const void *buf, size_t len)
{
}

#endif

#if defined(CONFIG_DYNAMIC_DEBUG)
#define print_hex_dump_debug(prefix_str, prefix_type, rowsize,	\
			     groupsize, buf, len, ascii)	\
	dynamic_hex_dump(prefix_str, prefix_type, rowsize,	\
			 groupsize, buf, len, ascii)
#elif defined(DEBUG)
#define print_hex_dump_debug(prefix_str, prefix_type, rowsize,		\
			     groupsize, buf, len, ascii)		\
	print_hex_dump(KERN_DEBUG, prefix_str, prefix_type, rowsize,	\
		       groupsize, buf, len, ascii)
#else
static inline void print_hex_dump_debug(const char *prefix_str, int prefix_type,
					int rowsize, int groupsize,
					const void *buf, size_t len, bool ascii)
{
}
#endif

#endif
Commit	Line	Data
	1	#ifndef __KERNEL_PRINTK__
	2	#define __KERNEL_PRINTK__
	3
	4	#include <stdarg.h>
	5	#include <linux/init.h>
	6	#include <linux/kern_levels.h>
	7	#include <linux/linkage.h>
	8	#include <linux/cache.h>
	9
	10	extern const char linux_banner[];
	11	extern const char linux_proc_banner[];
	12
	13	static inline int printk_get_level(const char *buffer)
	14	{
	15	if (buffer[0] == KERN_SOH_ASCII && buffer[1]) {
	16	switch (buffer[1]) {
	17	case '0' ... '7':
	18	case 'd': /* KERN_DEFAULT */
	19	return buffer[1];
	20	}
	21	}
	22	return 0;
	23	}
	24
	25	static inline const char printk_skip_level(const char buffer)
	26	{
	27	if (printk_get_level(buffer))
	28	return buffer + 2;
	29
	30	return buffer;
	31	}
	32
	33	#define CONSOLE_EXT_LOG_MAX 8192
	34
	35	/* printk's without a loglevel use this.. */
	36	#define MESSAGE_LOGLEVEL_DEFAULT CONFIG_MESSAGE_LOGLEVEL_DEFAULT
	37
	38	/* We show everything that is MORE important than this.. */
	39	#define CONSOLE_LOGLEVEL_SILENT 0 /* Mum's the word */
	40	#define CONSOLE_LOGLEVEL_MIN 1 /* Minimum loglevel we let people use */
	41	#define CONSOLE_LOGLEVEL_QUIET 4 /* Shhh ..., when booted with "quiet" */
	42	#define CONSOLE_LOGLEVEL_DEFAULT 7 /* anything MORE serious than KERN_DEBUG */
	43	#define CONSOLE_LOGLEVEL_DEBUG 10 /* issue debug messages */
	44	#define CONSOLE_LOGLEVEL_MOTORMOUTH 15 /* You can't shut this one up */
	45
	46	extern int console_printk[];
	47
	48	#define console_loglevel (console_printk[0])
	49	#define default_message_loglevel (console_printk[1])
	50	#define minimum_console_loglevel (console_printk[2])
	51	#define default_console_loglevel (console_printk[3])
	52
	53	static inline void console_silent(void)
	54	{
	55	console_loglevel = CONSOLE_LOGLEVEL_SILENT;
	56	}
	57
	58	static inline void console_verbose(void)
	59	{
	60	if (console_loglevel)
	61	console_loglevel = CONSOLE_LOGLEVEL_MOTORMOUTH;
	62	}
	63
	64	struct va_format {
	65	const char *fmt;
	66	va_list *va;
	67	};
	68
	69	/*
	70	* FW_BUG
	71	* Add this to a message where you are sure the firmware is buggy or behaves
	72	* really stupid or out of spec. Be aware that the responsible BIOS developer
	73	* should be able to fix this issue or at least get a concrete idea of the
	74	* problem by reading your message without the need of looking at the kernel
	75	* code.
	76	*
	77	* Use it for definite and high priority BIOS bugs.
	78	*
	79	* FW_WARN
	80	* Use it for not that clear (e.g. could the kernel messed up things already?)
	81	* and medium priority BIOS bugs.
	82	*
	83	* FW_INFO
	84	* Use this one if you want to tell the user or vendor about something
	85	* suspicious, but generally harmless related to the firmware.
	86	*
	87	* Use it for information or very low priority BIOS bugs.
	88	*/
	89	#define FW_BUG "[Firmware Bug]: "
	90	#define FW_WARN "[Firmware Warn]: "
	91	#define FW_INFO "[Firmware Info]: "
	92
	93	/*
	94	* HW_ERR
	95	* Add this to a message for hardware errors, so that user can report
	96	* it to hardware vendor instead of LKML or software vendor.
	97	*/
	98	#define HW_ERR "[Hardware Error]: "
	99
	100	/*
	101	* DEPRECATED
	102	* Add this to a message whenever you want to warn user space about the use
	103	* of a deprecated aspect of an API so they can stop using it
	104	*/
	105	#define DEPRECATED "[Deprecated]: "
	106
	107	/*
	108	* Dummy printk for disabled debugging statements to use whilst maintaining
	109	* gcc's format checking.
	110	*/
	111	#define no_printk(fmt, ...) \
	112	do { \
	113	if (0) \
	114	printk(fmt, ##__VA_ARGS__); \
	115	} while (0)
	116
	117	#ifdef CONFIG_EARLY_PRINTK
	118	extern asmlinkage __printf(1, 2)
	119	void early_printk(const char *fmt, ...);
	120	#else
	121	static inline __printf(1, 2) __cold
	122	void early_printk(const char *s, ...) { }
	123	#endif
	124
	125	#ifdef CONFIG_PRINTK_NMI
	126	extern void printk_nmi_init(void);
	127	extern void printk_nmi_enter(void);
	128	extern void printk_nmi_exit(void);
	129	extern void printk_nmi_flush(void);
	130	extern void printk_nmi_flush_on_panic(void);
	131	#else
	132	static inline void printk_nmi_init(void) { }
	133	static inline void printk_nmi_enter(void) { }
	134	static inline void printk_nmi_exit(void) { }
	135	static inline void printk_nmi_flush(void) { }
	136	static inline void printk_nmi_flush_on_panic(void) { }
	137	#endif /* PRINTK_NMI */
	138
	139	#ifdef CONFIG_PRINTK
	140	asmlinkage __printf(5, 0)
	141	int vprintk_emit(int facility, int level,
	142	const char *dict, size_t dictlen,
	143	const char *fmt, va_list args);
	144
	145	asmlinkage __printf(1, 0)
	146	int vprintk(const char *fmt, va_list args);
	147
	148	asmlinkage __printf(5, 6) __cold
	149	int printk_emit(int facility, int level,
	150	const char *dict, size_t dictlen,
	151	const char *fmt, ...);
	152
	153	asmlinkage __printf(1, 2) __cold
	154	int printk(const char *fmt, ...);
	155
	156	/*
	157	* Special printk facility for scheduler/timekeeping use only, _DO_NOT_USE_ !
	158	*/
	159	__printf(1, 2) __cold int printk_deferred(const char *fmt, ...);
	160
	161	/*
	162	* Please don't use printk_ratelimit(), because it shares ratelimiting state
	163	* with all other unrelated printk_ratelimit() callsites. Instead use
	164	* printk_ratelimited() or plain old __ratelimit().
	165	*/
	166	extern int __printk_ratelimit(const char *func);
	167	#define printk_ratelimit() __printk_ratelimit(__func__)
	168	extern bool printk_timed_ratelimit(unsigned long *caller_jiffies,
	169	unsigned int interval_msec);
	170
	171	extern int printk_delay_msec;
	172	extern int dmesg_restrict;
	173	extern int kptr_restrict;
	174
	175	extern void wake_up_klogd(void);
	176
	177	char *log_buf_addr_get(void);
	178	u32 log_buf_len_get(void);
	179	void log_buf_kexec_setup(void);
	180	void __init setup_log_buf(int early);
	181	__printf(1, 2) void dump_stack_set_arch_desc(const char *fmt, ...);
	182	void dump_stack_print_info(const char *log_lvl);
	183	void show_regs_print_info(const char *log_lvl);
	184	#else
	185	static inline __printf(1, 0)
	186	int vprintk(const char *s, va_list args)
	187	{
	188	return 0;
	189	}
	190	static inline __printf(1, 2) __cold
	191	int printk(const char *s, ...)
	192	{
	193	return 0;
	194	}
	195	static inline __printf(1, 2) __cold
	196	int printk_deferred(const char *s, ...)
	197	{
	198	return 0;
	199	}
	200	static inline int printk_ratelimit(void)
	201	{
	202	return 0;
	203	}
	204	static inline bool printk_timed_ratelimit(unsigned long *caller_jiffies,
	205	unsigned int interval_msec)
	206	{
	207	return false;
	208	}
	209
	210	static inline void wake_up_klogd(void)
	211	{
	212	}
	213
	214	static inline char *log_buf_addr_get(void)
	215	{
	216	return NULL;
	217	}
	218
	219	static inline u32 log_buf_len_get(void)
	220	{
	221	return 0;
	222	}
	223
	224	static inline void log_buf_kexec_setup(void)
	225	{
	226	}
	227
	228	static inline void setup_log_buf(int early)
	229	{
	230	}
	231
	232	static inline __printf(1, 2) void dump_stack_set_arch_desc(const char *fmt, ...)
	233	{
	234	}
	235
	236	static inline void dump_stack_print_info(const char *log_lvl)
	237	{
	238	}
	239
	240	static inline void show_regs_print_info(const char *log_lvl)
	241	{
	242	}
	243	#endif
	244
	245	extern asmlinkage void dump_stack(void) __cold;
	246
	247	#ifndef pr_fmt
	248	#define pr_fmt(fmt) fmt
	249	#endif
	250
	251	/*
	252	* These can be used to print at the various log levels.
	253	* All of these will print unconditionally, although note that pr_debug()
	254	* and other debug macros are compiled out unless either DEBUG is defined
	255	* or CONFIG_DYNAMIC_DEBUG is set.
	256	*/
	257	#define pr_emerg(fmt, ...) \
	258	printk(KERN_EMERG pr_fmt(fmt), ##__VA_ARGS__)
	259	#define pr_alert(fmt, ...) \
	260	printk(KERN_ALERT pr_fmt(fmt), ##__VA_ARGS__)
	261	#define pr_crit(fmt, ...) \
	262	printk(KERN_CRIT pr_fmt(fmt), ##__VA_ARGS__)
	263	#define pr_err(fmt, ...) \
	264	printk(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__)
	265	#define pr_warning(fmt, ...) \
	266	printk(KERN_WARNING pr_fmt(fmt), ##__VA_ARGS__)
	267	#define pr_warn pr_warning
	268	#define pr_notice(fmt, ...) \
	269	printk(KERN_NOTICE pr_fmt(fmt), ##__VA_ARGS__)
	270	#define pr_info(fmt, ...) \
	271	printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
	272	/*
	273	* Like KERN_CONT, pr_cont() should only be used when continuing
	274	* a line with no newline ('\n') enclosed. Otherwise it defaults
	275	* back to KERN_DEFAULT.
	276	*/
	277	#define pr_cont(fmt, ...) \
	278	printk(KERN_CONT fmt, ##__VA_ARGS__)
	279
	280	/* pr_devel() should produce zero code unless DEBUG is defined */
	281	#ifdef DEBUG
	282	#define pr_devel(fmt, ...) \
	283	printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
	284	#else
	285	#define pr_devel(fmt, ...) \
	286	no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
	287	#endif
	288
	289	#include <linux/dynamic_debug.h>
	290
	291	/* If you are writing a driver, please use dev_dbg instead */
	292	#if defined(CONFIG_DYNAMIC_DEBUG)
	293	/* dynamic_pr_debug() uses pr_fmt() internally so we don't need it here */
	294	#define pr_debug(fmt, ...) \
	295	dynamic_pr_debug(fmt, ##__VA_ARGS__)
	296	#elif defined(DEBUG)
	297	#define pr_debug(fmt, ...) \
	298	printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
	299	#else
	300	#define pr_debug(fmt, ...) \
	301	no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
	302	#endif
	303
	304	/*
	305	* Print a one-time message (analogous to WARN_ONCE() et al):
	306	*/
	307
	308	#ifdef CONFIG_PRINTK
	309	#define printk_once(fmt, ...) \
	310	({ \
	311	static bool __print_once __read_mostly; \
	312	\
	313	if (!__print_once) { \
	314	__print_once = true; \
	315	printk(fmt, ##__VA_ARGS__); \
	316	} \
	317	})
	318	#define printk_deferred_once(fmt, ...) \
	319	({ \
	320	static bool __print_once __read_mostly; \
	321	\
	322	if (!__print_once) { \
	323	__print_once = true; \
	324	printk_deferred(fmt, ##__VA_ARGS__); \
	325	} \
	326	})
	327	#else
	328	#define printk_once(fmt, ...) \
	329	no_printk(fmt, ##__VA_ARGS__)
	330	#define printk_deferred_once(fmt, ...) \
	331	no_printk(fmt, ##__VA_ARGS__)
	332	#endif
	333
	334	#define pr_emerg_once(fmt, ...) \
	335	printk_once(KERN_EMERG pr_fmt(fmt), ##__VA_ARGS__)
	336	#define pr_alert_once(fmt, ...) \
	337	printk_once(KERN_ALERT pr_fmt(fmt), ##__VA_ARGS__)
	338	#define pr_crit_once(fmt, ...) \
	339	printk_once(KERN_CRIT pr_fmt(fmt), ##__VA_ARGS__)
	340	#define pr_err_once(fmt, ...) \
	341	printk_once(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__)
	342	#define pr_warn_once(fmt, ...) \
	343	printk_once(KERN_WARNING pr_fmt(fmt), ##__VA_ARGS__)
	344	#define pr_notice_once(fmt, ...) \
	345	printk_once(KERN_NOTICE pr_fmt(fmt), ##__VA_ARGS__)
	346	#define pr_info_once(fmt, ...) \
	347	printk_once(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
	348	#define pr_cont_once(fmt, ...) \
	349	printk_once(KERN_CONT pr_fmt(fmt), ##__VA_ARGS__)
	350
	351	#if defined(DEBUG)
	352	#define pr_devel_once(fmt, ...) \
	353	printk_once(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
	354	#else
	355	#define pr_devel_once(fmt, ...) \
	356	no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
	357	#endif
	358
	359	/* If you are writing a driver, please use dev_dbg instead */
	360	#if defined(DEBUG)
	361	#define pr_debug_once(fmt, ...) \
	362	printk_once(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
	363	#else
	364	#define pr_debug_once(fmt, ...) \
	365	no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
	366	#endif
	367
	368	/*
	369	* ratelimited messages with local ratelimit_state,
	370	* no local ratelimit_state used in the !PRINTK case
	371	*/
	372	#ifdef CONFIG_PRINTK
	373	#define printk_ratelimited(fmt, ...) \
	374	({ \
	375	static DEFINE_RATELIMIT_STATE(_rs, \
	376	DEFAULT_RATELIMIT_INTERVAL, \
	377	DEFAULT_RATELIMIT_BURST); \
	378	\
	379	if (__ratelimit(&_rs)) \
	380	printk(fmt, ##__VA_ARGS__); \
	381	})
	382	#else
	383	#define printk_ratelimited(fmt, ...) \
	384	no_printk(fmt, ##__VA_ARGS__)
	385	#endif
	386
	387	#define pr_emerg_ratelimited(fmt, ...) \
	388	printk_ratelimited(KERN_EMERG pr_fmt(fmt), ##__VA_ARGS__)
	389	#define pr_alert_ratelimited(fmt, ...) \
	390	printk_ratelimited(KERN_ALERT pr_fmt(fmt), ##__VA_ARGS__)
	391	#define pr_crit_ratelimited(fmt, ...) \
	392	printk_ratelimited(KERN_CRIT pr_fmt(fmt), ##__VA_ARGS__)
	393	#define pr_err_ratelimited(fmt, ...) \
	394	printk_ratelimited(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__)
	395	#define pr_warn_ratelimited(fmt, ...) \
	396	printk_ratelimited(KERN_WARNING pr_fmt(fmt), ##__VA_ARGS__)
	397	#define pr_notice_ratelimited(fmt, ...) \
	398	printk_ratelimited(KERN_NOTICE pr_fmt(fmt), ##__VA_ARGS__)
	399	#define pr_info_ratelimited(fmt, ...) \
	400	printk_ratelimited(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
	401	/* no pr_cont_ratelimited, don't do that... */
	402
	403	#if defined(DEBUG)
	404	#define pr_devel_ratelimited(fmt, ...) \
	405	printk_ratelimited(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
	406	#else
	407	#define pr_devel_ratelimited(fmt, ...) \
	408	no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
	409	#endif
	410
	411	/* If you are writing a driver, please use dev_dbg instead */
	412	#if defined(CONFIG_DYNAMIC_DEBUG)
	413	/* descriptor check is first to prevent flooding with "callbacks suppressed" */
	414	#define pr_debug_ratelimited(fmt, ...) \
	415	do { \
	416	static DEFINE_RATELIMIT_STATE(_rs, \
	417	DEFAULT_RATELIMIT_INTERVAL, \
	418	DEFAULT_RATELIMIT_BURST); \
	419	DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, pr_fmt(fmt)); \
	420	if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT) && \
	421	__ratelimit(&_rs)) \
	422	__dynamic_pr_debug(&descriptor, pr_fmt(fmt), ##__VA_ARGS__); \
	423	} while (0)
	424	#elif defined(DEBUG)
	425	#define pr_debug_ratelimited(fmt, ...) \
	426	printk_ratelimited(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
	427	#else
	428	#define pr_debug_ratelimited(fmt, ...) \
	429	no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
	430	#endif
	431
	432	extern const struct file_operations kmsg_fops;
	433
	434	enum {
	435	DUMP_PREFIX_NONE,
	436	DUMP_PREFIX_ADDRESS,
	437	DUMP_PREFIX_OFFSET
	438	};
	439	extern int hex_dump_to_buffer(const void *buf, size_t len, int rowsize,
	440	int groupsize, char *linebuf, size_t linebuflen,
	441	bool ascii);
	442	#ifdef CONFIG_PRINTK
	443	extern void print_hex_dump(const char level, const char prefix_str,
	444	int prefix_type, int rowsize, int groupsize,
	445	const void *buf, size_t len, bool ascii);
	446	#if defined(CONFIG_DYNAMIC_DEBUG)
	447	#define print_hex_dump_bytes(prefix_str, prefix_type, buf, len) \
	448	dynamic_hex_dump(prefix_str, prefix_type, 16, 1, buf, len, true)
	449	#else
	450	extern void print_hex_dump_bytes(const char *prefix_str, int prefix_type,
	451	const void *buf, size_t len);
	452	#endif /* defined(CONFIG_DYNAMIC_DEBUG) */
	453	#else
	454	static inline void print_hex_dump(const char level, const char prefix_str,
	455	int prefix_type, int rowsize, int groupsize,
	456	const void *buf, size_t len, bool ascii)
	457	{
	458	}
	459	static inline void print_hex_dump_bytes(const char *prefix_str, int prefix_type,
	460	const void *buf, size_t len)
	461	{
	462	}
	463
	464	#endif
	465
	466	#if defined(CONFIG_DYNAMIC_DEBUG)
	467	#define print_hex_dump_debug(prefix_str, prefix_type, rowsize, \
	468	groupsize, buf, len, ascii) \
	469	dynamic_hex_dump(prefix_str, prefix_type, rowsize, \
	470	groupsize, buf, len, ascii)
	471	#elif defined(DEBUG)
	472	#define print_hex_dump_debug(prefix_str, prefix_type, rowsize, \
	473	groupsize, buf, len, ascii) \
	474	print_hex_dump(KERN_DEBUG, prefix_str, prefix_type, rowsize, \
	475	groupsize, buf, len, ascii)
	476	#else
	477	static inline void print_hex_dump_debug(const char *prefix_str, int prefix_type,
	478	int rowsize, int groupsize,
	479	const void *buf, size_t len, bool ascii)
	480	{
	481	}
	482	#endif
	483
	484	#endif