1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __KERNEL_PRINTK__
3 #define __KERNEL_PRINTK__
6 #include <linux/init.h>
7 #include <linux/kern_levels.h>
8 #include <linux/linkage.h>
9 #include <linux/cache.h>
10 #include <linux/ratelimit_types.h>
11 #include <linux/once_lite.h>
13 extern const char linux_banner[];
14 extern const char linux_proc_banner[];
16 extern int oops_in_progress; /* If set, an oops, panic(), BUG() or die() is in progress */
18 #define PRINTK_MAX_SINGLE_HEADER_LEN 2
20 static inline int printk_get_level(const char *buffer)
22 if (buffer[0] == KERN_SOH_ASCII && buffer[1]) {
25 case 'c': /* KERN_CONT */
32 static inline const char *printk_skip_level(const char *buffer)
34 if (printk_get_level(buffer))
40 static inline const char *printk_skip_headers(const char *buffer)
42 while (printk_get_level(buffer))
43 buffer = printk_skip_level(buffer);
48 #define CONSOLE_EXT_LOG_MAX 8192
50 /* printk's without a loglevel use this.. */
51 #define MESSAGE_LOGLEVEL_DEFAULT CONFIG_MESSAGE_LOGLEVEL_DEFAULT
53 /* We show everything that is MORE important than this.. */
54 #define CONSOLE_LOGLEVEL_SILENT 0 /* Mum's the word */
55 #define CONSOLE_LOGLEVEL_MIN 1 /* Minimum loglevel we let people use */
56 #define CONSOLE_LOGLEVEL_DEBUG 10 /* issue debug messages */
57 #define CONSOLE_LOGLEVEL_MOTORMOUTH 15 /* You can't shut this one up */
60 * Default used to be hard-coded at 7, quiet used to be hardcoded at 4,
61 * we're now allowing both to be set from kernel config.
63 #define CONSOLE_LOGLEVEL_DEFAULT CONFIG_CONSOLE_LOGLEVEL_DEFAULT
64 #define CONSOLE_LOGLEVEL_QUIET CONFIG_CONSOLE_LOGLEVEL_QUIET
66 extern int console_printk[];
68 #define console_loglevel (console_printk[0])
69 #define default_message_loglevel (console_printk[1])
70 #define minimum_console_loglevel (console_printk[2])
71 #define default_console_loglevel (console_printk[3])
73 extern void console_verbose(void);
75 /* strlen("ratelimit") + 1 */
76 #define DEVKMSG_STR_MAX_SIZE 10
77 extern char devkmsg_log_str[];
80 extern int suppress_printk;
89 * Add this to a message where you are sure the firmware is buggy or behaves
90 * really stupid or out of spec. Be aware that the responsible BIOS developer
91 * should be able to fix this issue or at least get a concrete idea of the
92 * problem by reading your message without the need of looking at the kernel
95 * Use it for definite and high priority BIOS bugs.
98 * Use it for not that clear (e.g. could the kernel messed up things already?)
99 * and medium priority BIOS bugs.
102 * Use this one if you want to tell the user or vendor about something
103 * suspicious, but generally harmless related to the firmware.
105 * Use it for information or very low priority BIOS bugs.
107 #define FW_BUG "[Firmware Bug]: "
108 #define FW_WARN "[Firmware Warn]: "
109 #define FW_INFO "[Firmware Info]: "
113 * Add this to a message for hardware errors, so that user can report
114 * it to hardware vendor instead of LKML or software vendor.
116 #define HW_ERR "[Hardware Error]: "
120 * Add this to a message whenever you want to warn user space about the use
121 * of a deprecated aspect of an API so they can stop using it
123 #define DEPRECATED "[Deprecated]: "
126 * Dummy printk for disabled debugging statements to use whilst maintaining
127 * gcc's format checking.
129 #define no_printk(fmt, ...) \
132 printk(fmt, ##__VA_ARGS__); \
136 #ifdef CONFIG_EARLY_PRINTK
137 extern asmlinkage __printf(1, 2)
138 void early_printk(const char *fmt, ...);
140 static inline __printf(1, 2) __cold
141 void early_printk(const char *s, ...) { }
144 #ifdef CONFIG_PRINTK_NMI
145 extern void printk_nmi_enter(void);
146 extern void printk_nmi_exit(void);
147 extern void printk_nmi_direct_enter(void);
148 extern void printk_nmi_direct_exit(void);
150 static inline void printk_nmi_enter(void) { }
151 static inline void printk_nmi_exit(void) { }
152 static inline void printk_nmi_direct_enter(void) { }
153 static inline void printk_nmi_direct_exit(void) { }
154 #endif /* PRINTK_NMI */
156 struct dev_printk_info;
159 asmlinkage __printf(4, 0)
160 int vprintk_emit(int facility, int level,
161 const struct dev_printk_info *dev_info,
162 const char *fmt, va_list args);
164 asmlinkage __printf(1, 0)
165 int vprintk(const char *fmt, va_list args);
167 asmlinkage __printf(1, 2) __cold
168 int _printk(const char *fmt, ...);
171 * Special printk facility for scheduler/timekeeping use only, _DO_NOT_USE_ !
173 __printf(1, 2) __cold int _printk_deferred(const char *fmt, ...);
176 * Please don't use printk_ratelimit(), because it shares ratelimiting state
177 * with all other unrelated printk_ratelimit() callsites. Instead use
178 * printk_ratelimited() or plain old __ratelimit().
180 extern int __printk_ratelimit(const char *func);
181 #define printk_ratelimit() __printk_ratelimit(__func__)
182 extern bool printk_timed_ratelimit(unsigned long *caller_jiffies,
183 unsigned int interval_msec);
185 extern int printk_delay_msec;
186 extern int dmesg_restrict;
189 devkmsg_sysctl_set_loglvl(struct ctl_table *table, int write, void *buf,
190 size_t *lenp, loff_t *ppos);
192 extern void wake_up_klogd(void);
194 char *log_buf_addr_get(void);
195 u32 log_buf_len_get(void);
196 void log_buf_vmcoreinfo_setup(void);
197 void __init setup_log_buf(int early);
198 __printf(1, 2) void dump_stack_set_arch_desc(const char *fmt, ...);
199 void dump_stack_print_info(const char *log_lvl);
200 void show_regs_print_info(const char *log_lvl);
201 extern asmlinkage void dump_stack_lvl(const char *log_lvl) __cold;
202 extern asmlinkage void dump_stack(void) __cold;
203 extern void printk_safe_flush(void);
204 extern void printk_safe_flush_on_panic(void);
206 static inline __printf(1, 0)
207 int vprintk(const char *s, va_list args)
211 static inline __printf(1, 2) __cold
212 int _printk(const char *s, ...)
216 static inline __printf(1, 2) __cold
217 int _printk_deferred(const char *s, ...)
221 static inline int printk_ratelimit(void)
225 static inline bool printk_timed_ratelimit(unsigned long *caller_jiffies,
226 unsigned int interval_msec)
231 static inline void wake_up_klogd(void)
235 static inline char *log_buf_addr_get(void)
240 static inline u32 log_buf_len_get(void)
245 static inline void log_buf_vmcoreinfo_setup(void)
249 static inline void setup_log_buf(int early)
253 static inline __printf(1, 2) void dump_stack_set_arch_desc(const char *fmt, ...)
257 static inline void dump_stack_print_info(const char *log_lvl)
261 static inline void show_regs_print_info(const char *log_lvl)
265 static inline void dump_stack_lvl(const char *log_lvl)
269 static inline void dump_stack(void)
273 static inline void printk_safe_flush(void)
277 static inline void printk_safe_flush_on_panic(void)
283 extern int __printk_cpu_trylock(void);
284 extern void __printk_wait_on_cpu_lock(void);
285 extern void __printk_cpu_unlock(void);
288 * printk_cpu_lock_irqsave() - Acquire the printk cpu-reentrant spinning
289 * lock and disable interrupts.
290 * @flags: Stack-allocated storage for saving local interrupt state,
291 * to be passed to printk_cpu_unlock_irqrestore().
293 * If the lock is owned by another CPU, spin until it becomes available.
294 * Interrupts are restored while spinning.
296 #define printk_cpu_lock_irqsave(flags) \
298 local_irq_save(flags); \
299 if (__printk_cpu_trylock()) \
301 local_irq_restore(flags); \
302 __printk_wait_on_cpu_lock(); \
306 * printk_cpu_unlock_irqrestore() - Release the printk cpu-reentrant spinning
307 * lock and restore interrupts.
308 * @flags: Caller's saved interrupt state, from printk_cpu_lock_irqsave().
310 #define printk_cpu_unlock_irqrestore(flags) \
312 __printk_cpu_unlock(); \
313 local_irq_restore(flags); \
318 #define printk_cpu_lock_irqsave(flags) ((void)flags)
319 #define printk_cpu_unlock_irqrestore(flags) ((void)flags)
321 #endif /* CONFIG_SMP */
323 extern int kptr_restrict;
326 * pr_fmt - used by the pr_*() macros to generate the printk format string
327 * @fmt: format string passed from a pr_*() macro
329 * This macro can be used to generate a unified format string for pr_*()
330 * macros. A common use is to prefix all pr_*() messages in a file with a common
331 * string. For example, defining this at the top of a source file:
333 * #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
335 * would prefix all pr_info, pr_emerg... messages in the file with the module
339 #define pr_fmt(fmt) fmt
344 #ifdef CONFIG_PRINTK_INDEX
352 * While printk and pr_* have the level stored in the string at compile
353 * time, some subsystems dynamically add it at runtime through the
354 * format string. For these dynamic cases, we allow the subsystem to
355 * tell us the level at compile time.
357 * NULL indicates that the level, if any, is stored in fmt.
362 * The format string used by various subsystem specific printk()
363 * wrappers to prefix the message.
365 * Note that the static prefix defined by the pr_fmt() macro is stored
366 * directly in the message format (@fmt), not here.
368 const char *subsys_fmt_prefix;
371 #define __printk_index_emit(_fmt, _level, _subsys_fmt_prefix) \
373 if (__builtin_constant_p(_fmt) && __builtin_constant_p(_level)) { \
375 * We check __builtin_constant_p multiple times here
376 * for the same input because GCC will produce an error
377 * if we try to assign a static variable to fmt if it
378 * is not a constant, even with the outer if statement.
380 static const struct pi_entry _entry \
382 .fmt = __builtin_constant_p(_fmt) ? (_fmt) : NULL, \
386 .level = __builtin_constant_p(_level) ? (_level) : NULL, \
387 .subsys_fmt_prefix = _subsys_fmt_prefix,\
389 static const struct pi_entry *_entry_ptr \
390 __used __section(".printk_index") = &_entry; \
394 #else /* !CONFIG_PRINTK_INDEX */
395 #define __printk_index_emit(...) do {} while (0)
396 #endif /* CONFIG_PRINTK_INDEX */
399 * Some subsystems have their own custom printk that applies a va_format to a
400 * generic format, for example, to include a device number or other metadata
401 * alongside the format supplied by the caller.
403 * In order to store these in the way they would be emitted by the printk
404 * infrastructure, the subsystem provides us with the start, fixed string, and
405 * any subsequent text in the format string.
407 * We take a variable argument list as pr_fmt/dev_fmt/etc are sometimes passed
408 * as multiple arguments (eg: `"%s: ", "blah"`), and we must only take the
411 * subsys_fmt_prefix must be known at compile time, or compilation will fail
412 * (since this is a mistake). If fmt or level is not known at compile time, no
413 * index entry will be made (since this can legitimately happen).
415 #define printk_index_subsys_emit(subsys_fmt_prefix, level, fmt, ...) \
416 __printk_index_emit(fmt, level, subsys_fmt_prefix)
418 #define printk_index_wrap(_p_func, _fmt, ...) \
420 __printk_index_emit(_fmt, NULL, NULL); \
421 _p_func(_fmt, ##__VA_ARGS__); \
426 * printk - print a kernel message
427 * @fmt: format string
429 * This is printk(). It can be called from any context. We want it to work.
431 * If printk indexing is enabled, _printk() is called from printk_index_wrap.
432 * Otherwise, printk is simply #defined to _printk.
434 * We try to grab the console_lock. If we succeed, it's easy - we log the
435 * output and call the console drivers. If we fail to get the semaphore, we
436 * place the output into the log buffer and return. The current holder of
437 * the console_sem will notice the new output in console_unlock(); and will
438 * send it to the consoles before releasing the lock.
440 * One effect of this deferred printing is that code which calls printk() and
441 * then changes console_loglevel may break. This is because console_loglevel
442 * is inspected when the actual printing occurs.
447 * See the vsnprintf() documentation for format string extensions over C99.
449 #define printk(fmt, ...) printk_index_wrap(_printk, fmt, ##__VA_ARGS__)
450 #define printk_deferred(fmt, ...) \
451 printk_index_wrap(_printk_deferred, fmt, ##__VA_ARGS__)
454 * pr_emerg - Print an emergency-level message
455 * @fmt: format string
456 * @...: arguments for the format string
458 * This macro expands to a printk with KERN_EMERG loglevel. It uses pr_fmt() to
459 * generate the format string.
461 #define pr_emerg(fmt, ...) \
462 printk(KERN_EMERG pr_fmt(fmt), ##__VA_ARGS__)
464 * pr_alert - Print an alert-level message
465 * @fmt: format string
466 * @...: arguments for the format string
468 * This macro expands to a printk with KERN_ALERT loglevel. It uses pr_fmt() to
469 * generate the format string.
471 #define pr_alert(fmt, ...) \
472 printk(KERN_ALERT pr_fmt(fmt), ##__VA_ARGS__)
474 * pr_crit - Print a critical-level message
475 * @fmt: format string
476 * @...: arguments for the format string
478 * This macro expands to a printk with KERN_CRIT loglevel. It uses pr_fmt() to
479 * generate the format string.
481 #define pr_crit(fmt, ...) \
482 printk(KERN_CRIT pr_fmt(fmt), ##__VA_ARGS__)
484 * pr_err - Print an error-level message
485 * @fmt: format string
486 * @...: arguments for the format string
488 * This macro expands to a printk with KERN_ERR loglevel. It uses pr_fmt() to
489 * generate the format string.
491 #define pr_err(fmt, ...) \
492 printk(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__)
494 * pr_warn - Print a warning-level message
495 * @fmt: format string
496 * @...: arguments for the format string
498 * This macro expands to a printk with KERN_WARNING loglevel. It uses pr_fmt()
499 * to generate the format string.
501 #define pr_warn(fmt, ...) \
502 printk(KERN_WARNING pr_fmt(fmt), ##__VA_ARGS__)
504 * pr_notice - Print a notice-level message
505 * @fmt: format string
506 * @...: arguments for the format string
508 * This macro expands to a printk with KERN_NOTICE loglevel. It uses pr_fmt() to
509 * generate the format string.
511 #define pr_notice(fmt, ...) \
512 printk(KERN_NOTICE pr_fmt(fmt), ##__VA_ARGS__)
514 * pr_info - Print an info-level message
515 * @fmt: format string
516 * @...: arguments for the format string
518 * This macro expands to a printk with KERN_INFO loglevel. It uses pr_fmt() to
519 * generate the format string.
521 #define pr_info(fmt, ...) \
522 printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
525 * pr_cont - Continues a previous log message in the same line.
526 * @fmt: format string
527 * @...: arguments for the format string
529 * This macro expands to a printk with KERN_CONT loglevel. It should only be
530 * used when continuing a log message with no newline ('\n') enclosed. Otherwise
531 * it defaults back to KERN_DEFAULT loglevel.
533 #define pr_cont(fmt, ...) \
534 printk(KERN_CONT fmt, ##__VA_ARGS__)
537 * pr_devel - Print a debug-level message conditionally
538 * @fmt: format string
539 * @...: arguments for the format string
541 * This macro expands to a printk with KERN_DEBUG loglevel if DEBUG is
542 * defined. Otherwise it does nothing.
544 * It uses pr_fmt() to generate the format string.
547 #define pr_devel(fmt, ...) \
548 printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
550 #define pr_devel(fmt, ...) \
551 no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
555 /* If you are writing a driver, please use dev_dbg instead */
556 #if defined(CONFIG_DYNAMIC_DEBUG) || \
557 (defined(CONFIG_DYNAMIC_DEBUG_CORE) && defined(DYNAMIC_DEBUG_MODULE))
558 #include <linux/dynamic_debug.h>
561 * pr_debug - Print a debug-level message conditionally
562 * @fmt: format string
563 * @...: arguments for the format string
565 * This macro expands to dynamic_pr_debug() if CONFIG_DYNAMIC_DEBUG is
566 * set. Otherwise, if DEBUG is defined, it's equivalent to a printk with
567 * KERN_DEBUG loglevel. If DEBUG is not defined it does nothing.
569 * It uses pr_fmt() to generate the format string (dynamic_pr_debug() uses
570 * pr_fmt() internally).
572 #define pr_debug(fmt, ...) \
573 dynamic_pr_debug(fmt, ##__VA_ARGS__)
575 #define pr_debug(fmt, ...) \
576 printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
578 #define pr_debug(fmt, ...) \
579 no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
583 * Print a one-time message (analogous to WARN_ONCE() et al):
587 #define printk_once(fmt, ...) \
588 DO_ONCE_LITE(printk, fmt, ##__VA_ARGS__)
589 #define printk_deferred_once(fmt, ...) \
590 DO_ONCE_LITE(printk_deferred, fmt, ##__VA_ARGS__)
592 #define printk_once(fmt, ...) \
593 no_printk(fmt, ##__VA_ARGS__)
594 #define printk_deferred_once(fmt, ...) \
595 no_printk(fmt, ##__VA_ARGS__)
598 #define pr_emerg_once(fmt, ...) \
599 printk_once(KERN_EMERG pr_fmt(fmt), ##__VA_ARGS__)
600 #define pr_alert_once(fmt, ...) \
601 printk_once(KERN_ALERT pr_fmt(fmt), ##__VA_ARGS__)
602 #define pr_crit_once(fmt, ...) \
603 printk_once(KERN_CRIT pr_fmt(fmt), ##__VA_ARGS__)
604 #define pr_err_once(fmt, ...) \
605 printk_once(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__)
606 #define pr_warn_once(fmt, ...) \
607 printk_once(KERN_WARNING pr_fmt(fmt), ##__VA_ARGS__)
608 #define pr_notice_once(fmt, ...) \
609 printk_once(KERN_NOTICE pr_fmt(fmt), ##__VA_ARGS__)
610 #define pr_info_once(fmt, ...) \
611 printk_once(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
612 /* no pr_cont_once, don't do that... */
615 #define pr_devel_once(fmt, ...) \
616 printk_once(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
618 #define pr_devel_once(fmt, ...) \
619 no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
622 /* If you are writing a driver, please use dev_dbg instead */
624 #define pr_debug_once(fmt, ...) \
625 printk_once(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
627 #define pr_debug_once(fmt, ...) \
628 no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
632 * ratelimited messages with local ratelimit_state,
633 * no local ratelimit_state used in the !PRINTK case
636 #define printk_ratelimited(fmt, ...) \
638 static DEFINE_RATELIMIT_STATE(_rs, \
639 DEFAULT_RATELIMIT_INTERVAL, \
640 DEFAULT_RATELIMIT_BURST); \
642 if (__ratelimit(&_rs)) \
643 printk(fmt, ##__VA_ARGS__); \
646 #define printk_ratelimited(fmt, ...) \
647 no_printk(fmt, ##__VA_ARGS__)
650 #define pr_emerg_ratelimited(fmt, ...) \
651 printk_ratelimited(KERN_EMERG pr_fmt(fmt), ##__VA_ARGS__)
652 #define pr_alert_ratelimited(fmt, ...) \
653 printk_ratelimited(KERN_ALERT pr_fmt(fmt), ##__VA_ARGS__)
654 #define pr_crit_ratelimited(fmt, ...) \
655 printk_ratelimited(KERN_CRIT pr_fmt(fmt), ##__VA_ARGS__)
656 #define pr_err_ratelimited(fmt, ...) \
657 printk_ratelimited(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__)
658 #define pr_warn_ratelimited(fmt, ...) \
659 printk_ratelimited(KERN_WARNING pr_fmt(fmt), ##__VA_ARGS__)
660 #define pr_notice_ratelimited(fmt, ...) \
661 printk_ratelimited(KERN_NOTICE pr_fmt(fmt), ##__VA_ARGS__)
662 #define pr_info_ratelimited(fmt, ...) \
663 printk_ratelimited(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
664 /* no pr_cont_ratelimited, don't do that... */
667 #define pr_devel_ratelimited(fmt, ...) \
668 printk_ratelimited(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
670 #define pr_devel_ratelimited(fmt, ...) \
671 no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
674 /* If you are writing a driver, please use dev_dbg instead */
675 #if defined(CONFIG_DYNAMIC_DEBUG) || \
676 (defined(CONFIG_DYNAMIC_DEBUG_CORE) && defined(DYNAMIC_DEBUG_MODULE))
677 /* descriptor check is first to prevent flooding with "callbacks suppressed" */
678 #define pr_debug_ratelimited(fmt, ...) \
680 static DEFINE_RATELIMIT_STATE(_rs, \
681 DEFAULT_RATELIMIT_INTERVAL, \
682 DEFAULT_RATELIMIT_BURST); \
683 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, pr_fmt(fmt)); \
684 if (DYNAMIC_DEBUG_BRANCH(descriptor) && \
686 __dynamic_pr_debug(&descriptor, pr_fmt(fmt), ##__VA_ARGS__); \
689 #define pr_debug_ratelimited(fmt, ...) \
690 printk_ratelimited(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
692 #define pr_debug_ratelimited(fmt, ...) \
693 no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
696 extern const struct file_operations kmsg_fops;
703 extern int hex_dump_to_buffer(const void *buf, size_t len, int rowsize,
704 int groupsize, char *linebuf, size_t linebuflen,
707 extern void print_hex_dump(const char *level, const char *prefix_str,
708 int prefix_type, int rowsize, int groupsize,
709 const void *buf, size_t len, bool ascii);
711 static inline void print_hex_dump(const char *level, const char *prefix_str,
712 int prefix_type, int rowsize, int groupsize,
713 const void *buf, size_t len, bool ascii)
716 static inline void print_hex_dump_bytes(const char *prefix_str, int prefix_type,
717 const void *buf, size_t len)
723 #if defined(CONFIG_DYNAMIC_DEBUG) || \
724 (defined(CONFIG_DYNAMIC_DEBUG_CORE) && defined(DYNAMIC_DEBUG_MODULE))
725 #define print_hex_dump_debug(prefix_str, prefix_type, rowsize, \
726 groupsize, buf, len, ascii) \
727 dynamic_hex_dump(prefix_str, prefix_type, rowsize, \
728 groupsize, buf, len, ascii)
730 #define print_hex_dump_debug(prefix_str, prefix_type, rowsize, \
731 groupsize, buf, len, ascii) \
732 print_hex_dump(KERN_DEBUG, prefix_str, prefix_type, rowsize, \
733 groupsize, buf, len, ascii)
735 static inline void print_hex_dump_debug(const char *prefix_str, int prefix_type,
736 int rowsize, int groupsize,
737 const void *buf, size_t len, bool ascii)
743 * print_hex_dump_bytes - shorthand form of print_hex_dump() with default params
744 * @prefix_str: string to prefix each line with;
745 * caller supplies trailing spaces for alignment if desired
746 * @prefix_type: controls whether prefix of an offset, address, or none
747 * is printed (%DUMP_PREFIX_OFFSET, %DUMP_PREFIX_ADDRESS, %DUMP_PREFIX_NONE)
748 * @buf: data blob to dump
749 * @len: number of bytes in the @buf
751 * Calls print_hex_dump(), with log level of KERN_DEBUG,
752 * rowsize of 16, groupsize of 1, and ASCII output included.
754 #define print_hex_dump_bytes(prefix_str, prefix_type, buf, len) \
755 print_hex_dump_debug(prefix_str, prefix_type, 16, 1, buf, len, true)