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- /* SPDX-License-Identifier: GPL-2.0 */
- #ifndef __KERNEL_PRINTK__
- #define __KERNEL_PRINTK__
- #include <linux/stdarg.h>
- #include <linux/init.h>
- #include <linux/kern_levels.h>
- #include <linux/linkage.h>
- #include <linux/ratelimit_types.h>
- #include <linux/once_lite.h>
- extern const char linux_banner[];
- extern const char linux_proc_banner[];
- extern int oops_in_progress; /* If set, an oops, panic(), BUG() or die() is in progress */
- #define PRINTK_MAX_SINGLE_HEADER_LEN 2
- static inline int printk_get_level(const char *buffer)
- {
- if (buffer[0] == KERN_SOH_ASCII && buffer[1]) {
- switch (buffer[1]) {
- case '0' ... '7':
- case 'c': /* KERN_CONT */
- 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;
- }
- static inline const char *printk_skip_headers(const char *buffer)
- {
- while (printk_get_level(buffer))
- buffer = printk_skip_level(buffer);
- 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_DEBUG 10 /* issue debug messages */
- #define CONSOLE_LOGLEVEL_MOTORMOUTH 15 /* You can't shut this one up */
- /*
- * Default used to be hard-coded at 7, quiet used to be hardcoded at 4,
- * we're now allowing both to be set from kernel config.
- */
- #define CONSOLE_LOGLEVEL_DEFAULT CONFIG_CONSOLE_LOGLEVEL_DEFAULT
- #define CONSOLE_LOGLEVEL_QUIET CONFIG_CONSOLE_LOGLEVEL_QUIET
- 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])
- extern void console_verbose(void);
- /* strlen("ratelimit") + 1 */
- #define DEVKMSG_STR_MAX_SIZE 10
- extern char devkmsg_log_str[];
- struct ctl_table;
- extern int suppress_printk;
- 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, ...) \
- ({ \
- if (0) \
- printk(fmt, ##__VA_ARGS__); \
- 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
- struct dev_printk_info;
- #ifdef CONFIG_PRINTK
- asmlinkage __printf(4, 0)
- int vprintk_emit(int facility, int level,
- const struct dev_printk_info *dev_info,
- const char *fmt, va_list args);
- asmlinkage __printf(1, 0)
- int vprintk(const char *fmt, va_list args);
- 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, ...);
- extern void __printk_safe_enter(void);
- extern void __printk_safe_exit(void);
- /*
- * The printk_deferred_enter/exit macros are available only as a hack for
- * some code paths that need to defer all printk console printing. Interrupts
- * must be disabled for the deferred duration.
- */
- #define printk_deferred_enter __printk_safe_enter
- #define printk_deferred_exit __printk_safe_exit
- /*
- * 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 void wake_up_klogd(void);
- char *log_buf_addr_get(void);
- u32 log_buf_len_get(void);
- void log_buf_vmcoreinfo_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);
- extern asmlinkage void dump_stack_lvl(const char *log_lvl) __cold;
- extern asmlinkage void dump_stack(void) __cold;
- void printk_trigger_flush(void);
- #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 void printk_deferred_enter(void)
- {
- }
- static inline void printk_deferred_exit(void)
- {
- }
- 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_vmcoreinfo_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)
- {
- }
- static inline void dump_stack_lvl(const char *log_lvl)
- {
- }
- static inline void dump_stack(void)
- {
- }
- static inline void printk_trigger_flush(void)
- {
- }
- #endif
- #ifdef CONFIG_SMP
- extern int __printk_cpu_sync_try_get(void);
- extern void __printk_cpu_sync_wait(void);
- extern void __printk_cpu_sync_put(void);
- #else
- #define __printk_cpu_sync_try_get() true
- #define __printk_cpu_sync_wait()
- #define __printk_cpu_sync_put()
- #endif /* CONFIG_SMP */
- /**
- * printk_cpu_sync_get_irqsave() - Disable interrupts and acquire the printk
- * cpu-reentrant spinning lock.
- * @flags: Stack-allocated storage for saving local interrupt state,
- * to be passed to printk_cpu_sync_put_irqrestore().
- *
- * If the lock is owned by another CPU, spin until it becomes available.
- * Interrupts are restored while spinning.
- *
- * CAUTION: This function must be used carefully. It does not behave like a
- * typical lock. Here are important things to watch out for...
- *
- * * This function is reentrant on the same CPU. Therefore the calling
- * code must not assume exclusive access to data if code accessing the
- * data can run reentrant or within NMI context on the same CPU.
- *
- * * If there exists usage of this function from NMI context, it becomes
- * unsafe to perform any type of locking or spinning to wait for other
- * CPUs after calling this function from any context. This includes
- * using spinlocks or any other busy-waiting synchronization methods.
- */
- #define printk_cpu_sync_get_irqsave(flags) \
- for (;;) { \
- local_irq_save(flags); \
- if (__printk_cpu_sync_try_get()) \
- break; \
- local_irq_restore(flags); \
- __printk_cpu_sync_wait(); \
- }
- /**
- * printk_cpu_sync_put_irqrestore() - Release the printk cpu-reentrant spinning
- * lock and restore interrupts.
- * @flags: Caller's saved interrupt state, from printk_cpu_sync_get_irqsave().
- */
- #define printk_cpu_sync_put_irqrestore(flags) \
- do { \
- __printk_cpu_sync_put(); \
- local_irq_restore(flags); \
- } while (0)
- extern int kptr_restrict;
- /**
- * pr_fmt - used by the pr_*() macros to generate the printk format string
- * @fmt: format string passed from a pr_*() macro
- *
- * This macro can be used to generate a unified format string for pr_*()
- * macros. A common use is to prefix all pr_*() messages in a file with a common
- * string. For example, defining this at the top of a source file:
- *
- * #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
- *
- * would prefix all pr_info, pr_emerg... messages in the file with the module
- * name.
- */
- #ifndef pr_fmt
- #define pr_fmt(fmt) fmt
- #endif
- struct module;
- #ifdef CONFIG_PRINTK_INDEX
- struct pi_entry {
- const char *fmt;
- const char *func;
- const char *file;
- unsigned int line;
- /*
- * While printk and pr_* have the level stored in the string at compile
- * time, some subsystems dynamically add it at runtime through the
- * format string. For these dynamic cases, we allow the subsystem to
- * tell us the level at compile time.
- *
- * NULL indicates that the level, if any, is stored in fmt.
- */
- const char *level;
- /*
- * The format string used by various subsystem specific printk()
- * wrappers to prefix the message.
- *
- * Note that the static prefix defined by the pr_fmt() macro is stored
- * directly in the message format (@fmt), not here.
- */
- const char *subsys_fmt_prefix;
- } __packed;
- #define __printk_index_emit(_fmt, _level, _subsys_fmt_prefix) \
- do { \
- if (__builtin_constant_p(_fmt) && __builtin_constant_p(_level)) { \
- /*
- * We check __builtin_constant_p multiple times here
- * for the same input because GCC will produce an error
- * if we try to assign a static variable to fmt if it
- * is not a constant, even with the outer if statement.
- */ \
- static const struct pi_entry _entry \
- __used = { \
- .fmt = __builtin_constant_p(_fmt) ? (_fmt) : NULL, \
- .func = __func__, \
- .file = __FILE__, \
- .line = __LINE__, \
- .level = __builtin_constant_p(_level) ? (_level) : NULL, \
- .subsys_fmt_prefix = _subsys_fmt_prefix,\
- }; \
- static const struct pi_entry *_entry_ptr \
- __used __section(".printk_index") = &_entry; \
- } \
- } while (0)
- #else /* !CONFIG_PRINTK_INDEX */
- #define __printk_index_emit(...) do {} while (0)
- #endif /* CONFIG_PRINTK_INDEX */
- /*
- * Some subsystems have their own custom printk that applies a va_format to a
- * generic format, for example, to include a device number or other metadata
- * alongside the format supplied by the caller.
- *
- * In order to store these in the way they would be emitted by the printk
- * infrastructure, the subsystem provides us with the start, fixed string, and
- * any subsequent text in the format string.
- *
- * We take a variable argument list as pr_fmt/dev_fmt/etc are sometimes passed
- * as multiple arguments (eg: `"%s: ", "blah"`), and we must only take the
- * first one.
- *
- * subsys_fmt_prefix must be known at compile time, or compilation will fail
- * (since this is a mistake). If fmt or level is not known at compile time, no
- * index entry will be made (since this can legitimately happen).
- */
- #define printk_index_subsys_emit(subsys_fmt_prefix, level, fmt, ...) \
- __printk_index_emit(fmt, level, subsys_fmt_prefix)
- #define printk_index_wrap(_p_func, _fmt, ...) \
- ({ \
- __printk_index_emit(_fmt, NULL, NULL); \
- _p_func(_fmt, ##__VA_ARGS__); \
- })
- /**
- * printk - print a kernel message
- * @fmt: format string
- *
- * This is printk(). It can be called from any context. We want it to work.
- *
- * If printk indexing is enabled, _printk() is called from printk_index_wrap.
- * Otherwise, printk is simply #defined to _printk.
- *
- * We try to grab the console_lock. If we succeed, it's easy - we log the
- * output and call the console drivers. If we fail to get the semaphore, we
- * place the output into the log buffer and return. The current holder of
- * the console_sem will notice the new output in console_unlock(); and will
- * send it to the consoles before releasing the lock.
- *
- * One effect of this deferred printing is that code which calls printk() and
- * then changes console_loglevel may break. This is because console_loglevel
- * is inspected when the actual printing occurs.
- *
- * See also:
- * printf(3)
- *
- * See the vsnprintf() documentation for format string extensions over C99.
- */
- #define printk(fmt, ...) printk_index_wrap(_printk, fmt, ##__VA_ARGS__)
- #define printk_deferred(fmt, ...) \
- printk_index_wrap(_printk_deferred, fmt, ##__VA_ARGS__)
- /**
- * pr_emerg - Print an emergency-level message
- * @fmt: format string
- * @...: arguments for the format string
- *
- * This macro expands to a printk with KERN_EMERG loglevel. It uses pr_fmt() to
- * generate the format string.
- */
- #define pr_emerg(fmt, ...) \
- printk(KERN_EMERG pr_fmt(fmt), ##__VA_ARGS__)
- /**
- * pr_alert - Print an alert-level message
- * @fmt: format string
- * @...: arguments for the format string
- *
- * This macro expands to a printk with KERN_ALERT loglevel. It uses pr_fmt() to
- * generate the format string.
- */
- #define pr_alert(fmt, ...) \
- printk(KERN_ALERT pr_fmt(fmt), ##__VA_ARGS__)
- /**
- * pr_crit - Print a critical-level message
- * @fmt: format string
- * @...: arguments for the format string
- *
- * This macro expands to a printk with KERN_CRIT loglevel. It uses pr_fmt() to
- * generate the format string.
- */
- #define pr_crit(fmt, ...) \
- printk(KERN_CRIT pr_fmt(fmt), ##__VA_ARGS__)
- /**
- * pr_err - Print an error-level message
- * @fmt: format string
- * @...: arguments for the format string
- *
- * This macro expands to a printk with KERN_ERR loglevel. It uses pr_fmt() to
- * generate the format string.
- */
- #define pr_err(fmt, ...) \
- printk(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__)
- /**
- * pr_warn - Print a warning-level message
- * @fmt: format string
- * @...: arguments for the format string
- *
- * This macro expands to a printk with KERN_WARNING loglevel. It uses pr_fmt()
- * to generate the format string.
- */
- #define pr_warn(fmt, ...) \
- printk(KERN_WARNING pr_fmt(fmt), ##__VA_ARGS__)
- /**
- * pr_notice - Print a notice-level message
- * @fmt: format string
- * @...: arguments for the format string
- *
- * This macro expands to a printk with KERN_NOTICE loglevel. It uses pr_fmt() to
- * generate the format string.
- */
- #define pr_notice(fmt, ...) \
- printk(KERN_NOTICE pr_fmt(fmt), ##__VA_ARGS__)
- /**
- * pr_info - Print an info-level message
- * @fmt: format string
- * @...: arguments for the format string
- *
- * This macro expands to a printk with KERN_INFO loglevel. It uses pr_fmt() to
- * generate the format string.
- */
- #define pr_info(fmt, ...) \
- printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
- /**
- * pr_cont - Continues a previous log message in the same line.
- * @fmt: format string
- * @...: arguments for the format string
- *
- * This macro expands to a printk with KERN_CONT loglevel. It should only be
- * used when continuing a log message with no newline ('\n') enclosed. Otherwise
- * it defaults back to KERN_DEFAULT loglevel.
- */
- #define pr_cont(fmt, ...) \
- printk(KERN_CONT fmt, ##__VA_ARGS__)
- /**
- * pr_devel - Print a debug-level message conditionally
- * @fmt: format string
- * @...: arguments for the format string
- *
- * This macro expands to a printk with KERN_DEBUG loglevel if DEBUG is
- * defined. Otherwise it does nothing.
- *
- * It uses pr_fmt() to generate the format string.
- */
- #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
- /* If you are writing a driver, please use dev_dbg instead */
- #if defined(CONFIG_DYNAMIC_DEBUG) || \
- (defined(CONFIG_DYNAMIC_DEBUG_CORE) && defined(DYNAMIC_DEBUG_MODULE))
- #include <linux/dynamic_debug.h>
- /**
- * pr_debug - Print a debug-level message conditionally
- * @fmt: format string
- * @...: arguments for the format string
- *
- * This macro expands to dynamic_pr_debug() if CONFIG_DYNAMIC_DEBUG is
- * set. Otherwise, if DEBUG is defined, it's equivalent to a printk with
- * KERN_DEBUG loglevel. If DEBUG is not defined it does nothing.
- *
- * It uses pr_fmt() to generate the format string (dynamic_pr_debug() uses
- * pr_fmt() internally).
- */
- #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, ...) \
- DO_ONCE_LITE(printk, fmt, ##__VA_ARGS__)
- #define printk_deferred_once(fmt, ...) \
- DO_ONCE_LITE(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__)
- /* no pr_cont_once, don't do that... */
- #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) || \
- (defined(CONFIG_DYNAMIC_DEBUG_CORE) && defined(DYNAMIC_DEBUG_MODULE))
- /* 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 (DYNAMIC_DEBUG_BRANCH(descriptor) && \
- __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);
- #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) || \
- (defined(CONFIG_DYNAMIC_DEBUG_CORE) && defined(DYNAMIC_DEBUG_MODULE))
- #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
- /**
- * print_hex_dump_bytes - shorthand form of print_hex_dump() with default params
- * @prefix_str: string to prefix each line with;
- * caller supplies trailing spaces for alignment if desired
- * @prefix_type: controls whether prefix of an offset, address, or none
- * is printed (%DUMP_PREFIX_OFFSET, %DUMP_PREFIX_ADDRESS, %DUMP_PREFIX_NONE)
- * @buf: data blob to dump
- * @len: number of bytes in the @buf
- *
- * Calls print_hex_dump(), with log level of KERN_DEBUG,
- * rowsize of 16, groupsize of 1, and ASCII output included.
- */
- #define print_hex_dump_bytes(prefix_str, prefix_type, buf, len) \
- print_hex_dump_debug(prefix_str, prefix_type, 16, 1, buf, len, true)
- #endif
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