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765 lines
23 KiB
765 lines
23 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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#ifndef __KERNEL_PRINTK__ |
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#define __KERNEL_PRINTK__ |
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#include <linux/stdarg.h> |
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#include <linux/init.h> |
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#include <linux/kern_levels.h> |
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#include <linux/linkage.h> |
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#include <linux/ratelimit_types.h> |
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#include <linux/once_lite.h> |
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extern const char linux_banner[]; |
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extern const char linux_proc_banner[]; |
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extern int oops_in_progress; /* If set, an oops, panic(), BUG() or die() is in progress */ |
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#define PRINTK_MAX_SINGLE_HEADER_LEN 2 |
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static inline int printk_get_level(const char *buffer) |
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{ |
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if (buffer[0] == KERN_SOH_ASCII && buffer[1]) { |
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switch (buffer[1]) { |
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case '0' ... '7': |
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case 'c': /* KERN_CONT */ |
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return buffer[1]; |
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} |
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} |
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return 0; |
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} |
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static inline const char *printk_skip_level(const char *buffer) |
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{ |
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if (printk_get_level(buffer)) |
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return buffer + 2; |
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return buffer; |
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} |
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static inline const char *printk_skip_headers(const char *buffer) |
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{ |
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while (printk_get_level(buffer)) |
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buffer = printk_skip_level(buffer); |
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return buffer; |
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} |
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#define CONSOLE_EXT_LOG_MAX 8192 |
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/* printk's without a loglevel use this.. */ |
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#define MESSAGE_LOGLEVEL_DEFAULT CONFIG_MESSAGE_LOGLEVEL_DEFAULT |
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/* We show everything that is MORE important than this.. */ |
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#define CONSOLE_LOGLEVEL_SILENT 0 /* Mum's the word */ |
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#define CONSOLE_LOGLEVEL_MIN 1 /* Minimum loglevel we let people use */ |
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#define CONSOLE_LOGLEVEL_DEBUG 10 /* issue debug messages */ |
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#define CONSOLE_LOGLEVEL_MOTORMOUTH 15 /* You can't shut this one up */ |
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/* |
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* Default used to be hard-coded at 7, quiet used to be hardcoded at 4, |
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* we're now allowing both to be set from kernel config. |
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*/ |
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#define CONSOLE_LOGLEVEL_DEFAULT CONFIG_CONSOLE_LOGLEVEL_DEFAULT |
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#define CONSOLE_LOGLEVEL_QUIET CONFIG_CONSOLE_LOGLEVEL_QUIET |
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extern int console_printk[]; |
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#define console_loglevel (console_printk[0]) |
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#define default_message_loglevel (console_printk[1]) |
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#define minimum_console_loglevel (console_printk[2]) |
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#define default_console_loglevel (console_printk[3]) |
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extern void console_verbose(void); |
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/* strlen("ratelimit") + 1 */ |
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#define DEVKMSG_STR_MAX_SIZE 10 |
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extern char devkmsg_log_str[]; |
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struct ctl_table; |
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extern int suppress_printk; |
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struct va_format { |
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const char *fmt; |
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va_list *va; |
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}; |
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/* |
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* FW_BUG |
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* Add this to a message where you are sure the firmware is buggy or behaves |
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* really stupid or out of spec. Be aware that the responsible BIOS developer |
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* should be able to fix this issue or at least get a concrete idea of the |
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* problem by reading your message without the need of looking at the kernel |
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* code. |
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* |
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* Use it for definite and high priority BIOS bugs. |
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* |
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* FW_WARN |
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* Use it for not that clear (e.g. could the kernel messed up things already?) |
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* and medium priority BIOS bugs. |
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* |
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* FW_INFO |
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* Use this one if you want to tell the user or vendor about something |
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* suspicious, but generally harmless related to the firmware. |
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* |
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* Use it for information or very low priority BIOS bugs. |
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*/ |
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#define FW_BUG "[Firmware Bug]: " |
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#define FW_WARN "[Firmware Warn]: " |
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#define FW_INFO "[Firmware Info]: " |
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/* |
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* HW_ERR |
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* Add this to a message for hardware errors, so that user can report |
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* it to hardware vendor instead of LKML or software vendor. |
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*/ |
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#define HW_ERR "[Hardware Error]: " |
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/* |
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* DEPRECATED |
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* Add this to a message whenever you want to warn user space about the use |
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* of a deprecated aspect of an API so they can stop using it |
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*/ |
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#define DEPRECATED "[Deprecated]: " |
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/* |
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* Dummy printk for disabled debugging statements to use whilst maintaining |
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* gcc's format checking. |
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*/ |
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#define no_printk(fmt, ...) \ |
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({ \ |
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if (0) \ |
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printk(fmt, ##__VA_ARGS__); \ |
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0; \ |
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}) |
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#ifdef CONFIG_EARLY_PRINTK |
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extern asmlinkage __printf(1, 2) |
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void early_printk(const char *fmt, ...); |
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#else |
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static inline __printf(1, 2) __cold |
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void early_printk(const char *s, ...) { } |
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#endif |
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struct dev_printk_info; |
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#ifdef CONFIG_PRINTK |
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asmlinkage __printf(4, 0) |
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int vprintk_emit(int facility, int level, |
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const struct dev_printk_info *dev_info, |
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const char *fmt, va_list args); |
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asmlinkage __printf(1, 0) |
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int vprintk(const char *fmt, va_list args); |
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asmlinkage __printf(1, 2) __cold |
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int _printk(const char *fmt, ...); |
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/* |
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* Special printk facility for scheduler/timekeeping use only, _DO_NOT_USE_ ! |
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*/ |
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__printf(1, 2) __cold int _printk_deferred(const char *fmt, ...); |
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extern void __printk_safe_enter(void); |
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extern void __printk_safe_exit(void); |
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/* |
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* The printk_deferred_enter/exit macros are available only as a hack for |
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* some code paths that need to defer all printk console printing. Interrupts |
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* must be disabled for the deferred duration. |
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*/ |
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#define printk_deferred_enter __printk_safe_enter |
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#define printk_deferred_exit __printk_safe_exit |
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/* |
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* Please don't use printk_ratelimit(), because it shares ratelimiting state |
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* with all other unrelated printk_ratelimit() callsites. Instead use |
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* printk_ratelimited() or plain old __ratelimit(). |
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*/ |
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extern int __printk_ratelimit(const char *func); |
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#define printk_ratelimit() __printk_ratelimit(__func__) |
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extern bool printk_timed_ratelimit(unsigned long *caller_jiffies, |
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unsigned int interval_msec); |
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extern int printk_delay_msec; |
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extern int dmesg_restrict; |
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extern void wake_up_klogd(void); |
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char *log_buf_addr_get(void); |
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u32 log_buf_len_get(void); |
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void log_buf_vmcoreinfo_setup(void); |
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void __init setup_log_buf(int early); |
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__printf(1, 2) void dump_stack_set_arch_desc(const char *fmt, ...); |
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void dump_stack_print_info(const char *log_lvl); |
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void show_regs_print_info(const char *log_lvl); |
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extern asmlinkage void dump_stack_lvl(const char *log_lvl) __cold; |
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extern asmlinkage void dump_stack(void) __cold; |
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void printk_trigger_flush(void); |
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#else |
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static inline __printf(1, 0) |
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int vprintk(const char *s, va_list args) |
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{ |
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return 0; |
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} |
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static inline __printf(1, 2) __cold |
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int _printk(const char *s, ...) |
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{ |
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return 0; |
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} |
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static inline __printf(1, 2) __cold |
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int _printk_deferred(const char *s, ...) |
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{ |
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return 0; |
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} |
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static inline void printk_deferred_enter(void) |
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{ |
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} |
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static inline void printk_deferred_exit(void) |
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{ |
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} |
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static inline int printk_ratelimit(void) |
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{ |
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return 0; |
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} |
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static inline bool printk_timed_ratelimit(unsigned long *caller_jiffies, |
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unsigned int interval_msec) |
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{ |
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return false; |
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} |
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static inline void wake_up_klogd(void) |
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{ |
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} |
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static inline char *log_buf_addr_get(void) |
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{ |
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return NULL; |
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} |
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static inline u32 log_buf_len_get(void) |
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{ |
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return 0; |
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} |
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static inline void log_buf_vmcoreinfo_setup(void) |
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{ |
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} |
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static inline void setup_log_buf(int early) |
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{ |
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} |
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static inline __printf(1, 2) void dump_stack_set_arch_desc(const char *fmt, ...) |
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{ |
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} |
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static inline void dump_stack_print_info(const char *log_lvl) |
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{ |
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} |
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static inline void show_regs_print_info(const char *log_lvl) |
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{ |
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} |
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static inline void dump_stack_lvl(const char *log_lvl) |
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{ |
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} |
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static inline void dump_stack(void) |
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{ |
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} |
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static inline void printk_trigger_flush(void) |
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{ |
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} |
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#endif |
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#ifdef CONFIG_SMP |
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extern int __printk_cpu_sync_try_get(void); |
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extern void __printk_cpu_sync_wait(void); |
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extern void __printk_cpu_sync_put(void); |
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#else |
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#define __printk_cpu_sync_try_get() true |
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#define __printk_cpu_sync_wait() |
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#define __printk_cpu_sync_put() |
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#endif /* CONFIG_SMP */ |
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/** |
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* printk_cpu_sync_get_irqsave() - Disable interrupts and acquire the printk |
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* cpu-reentrant spinning lock. |
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* @flags: Stack-allocated storage for saving local interrupt state, |
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* to be passed to printk_cpu_sync_put_irqrestore(). |
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* |
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* If the lock is owned by another CPU, spin until it becomes available. |
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* Interrupts are restored while spinning. |
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* |
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* CAUTION: This function must be used carefully. It does not behave like a |
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* typical lock. Here are important things to watch out for... |
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* |
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* * This function is reentrant on the same CPU. Therefore the calling |
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* code must not assume exclusive access to data if code accessing the |
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* data can run reentrant or within NMI context on the same CPU. |
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* |
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* * If there exists usage of this function from NMI context, it becomes |
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* unsafe to perform any type of locking or spinning to wait for other |
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* CPUs after calling this function from any context. This includes |
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* using spinlocks or any other busy-waiting synchronization methods. |
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*/ |
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#define printk_cpu_sync_get_irqsave(flags) \ |
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for (;;) { \ |
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local_irq_save(flags); \ |
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if (__printk_cpu_sync_try_get()) \ |
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break; \ |
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local_irq_restore(flags); \ |
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__printk_cpu_sync_wait(); \ |
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} |
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/** |
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* printk_cpu_sync_put_irqrestore() - Release the printk cpu-reentrant spinning |
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* lock and restore interrupts. |
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* @flags: Caller's saved interrupt state, from printk_cpu_sync_get_irqsave(). |
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*/ |
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#define printk_cpu_sync_put_irqrestore(flags) \ |
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do { \ |
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__printk_cpu_sync_put(); \ |
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local_irq_restore(flags); \ |
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} while (0) |
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extern int kptr_restrict; |
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/** |
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* pr_fmt - used by the pr_*() macros to generate the printk format string |
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* @fmt: format string passed from a pr_*() macro |
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* |
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* This macro can be used to generate a unified format string for pr_*() |
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* macros. A common use is to prefix all pr_*() messages in a file with a common |
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* string. For example, defining this at the top of a source file: |
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* |
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* #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
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* |
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* would prefix all pr_info, pr_emerg... messages in the file with the module |
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* name. |
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*/ |
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#ifndef pr_fmt |
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#define pr_fmt(fmt) fmt |
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#endif |
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struct module; |
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#ifdef CONFIG_PRINTK_INDEX |
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struct pi_entry { |
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const char *fmt; |
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const char *func; |
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const char *file; |
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unsigned int line; |
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/* |
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* While printk and pr_* have the level stored in the string at compile |
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* time, some subsystems dynamically add it at runtime through the |
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* format string. For these dynamic cases, we allow the subsystem to |
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* tell us the level at compile time. |
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* |
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* NULL indicates that the level, if any, is stored in fmt. |
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*/ |
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const char *level; |
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/* |
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* The format string used by various subsystem specific printk() |
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* wrappers to prefix the message. |
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* |
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* Note that the static prefix defined by the pr_fmt() macro is stored |
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* directly in the message format (@fmt), not here. |
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*/ |
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const char *subsys_fmt_prefix; |
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} __packed; |
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#define __printk_index_emit(_fmt, _level, _subsys_fmt_prefix) \ |
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do { \ |
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if (__builtin_constant_p(_fmt) && __builtin_constant_p(_level)) { \ |
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/* |
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* We check __builtin_constant_p multiple times here |
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* for the same input because GCC will produce an error |
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* if we try to assign a static variable to fmt if it |
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* is not a constant, even with the outer if statement. |
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*/ \ |
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static const struct pi_entry _entry \ |
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__used = { \ |
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.fmt = __builtin_constant_p(_fmt) ? (_fmt) : NULL, \ |
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.func = __func__, \ |
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.file = __FILE__, \ |
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.line = __LINE__, \ |
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.level = __builtin_constant_p(_level) ? (_level) : NULL, \ |
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.subsys_fmt_prefix = _subsys_fmt_prefix,\ |
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}; \ |
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static const struct pi_entry *_entry_ptr \ |
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__used __section(".printk_index") = &_entry; \ |
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} \ |
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} while (0) |
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#else /* !CONFIG_PRINTK_INDEX */ |
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#define __printk_index_emit(...) do {} while (0) |
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#endif /* CONFIG_PRINTK_INDEX */ |
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/* |
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* Some subsystems have their own custom printk that applies a va_format to a |
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* generic format, for example, to include a device number or other metadata |
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* alongside the format supplied by the caller. |
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* |
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* In order to store these in the way they would be emitted by the printk |
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* infrastructure, the subsystem provides us with the start, fixed string, and |
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* any subsequent text in the format string. |
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* |
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* We take a variable argument list as pr_fmt/dev_fmt/etc are sometimes passed |
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* as multiple arguments (eg: `"%s: ", "blah"`), and we must only take the |
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* first one. |
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* |
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* subsys_fmt_prefix must be known at compile time, or compilation will fail |
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* (since this is a mistake). If fmt or level is not known at compile time, no |
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* index entry will be made (since this can legitimately happen). |
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*/ |
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#define printk_index_subsys_emit(subsys_fmt_prefix, level, fmt, ...) \ |
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__printk_index_emit(fmt, level, subsys_fmt_prefix) |
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#define printk_index_wrap(_p_func, _fmt, ...) \ |
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({ \ |
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__printk_index_emit(_fmt, NULL, NULL); \ |
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_p_func(_fmt, ##__VA_ARGS__); \ |
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}) |
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/** |
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* printk - print a kernel message |
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* @fmt: format string |
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* |
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* This is printk(). It can be called from any context. We want it to work. |
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* |
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* If printk indexing is enabled, _printk() is called from printk_index_wrap. |
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* Otherwise, printk is simply #defined to _printk. |
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* |
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* We try to grab the console_lock. If we succeed, it's easy - we log the |
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* output and call the console drivers. If we fail to get the semaphore, we |
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* place the output into the log buffer and return. The current holder of |
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* the console_sem will notice the new output in console_unlock(); and will |
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* send it to the consoles before releasing the lock. |
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* |
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* One effect of this deferred printing is that code which calls printk() and |
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* then changes console_loglevel may break. This is because console_loglevel |
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* is inspected when the actual printing occurs. |
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* |
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* See also: |
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* printf(3) |
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* |
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* See the vsnprintf() documentation for format string extensions over C99. |
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*/ |
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#define printk(fmt, ...) printk_index_wrap(_printk, fmt, ##__VA_ARGS__) |
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#define printk_deferred(fmt, ...) \ |
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printk_index_wrap(_printk_deferred, fmt, ##__VA_ARGS__) |
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/** |
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* pr_emerg - Print an emergency-level message |
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* @fmt: format string |
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* @...: arguments for the format string |
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* |
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* This macro expands to a printk with KERN_EMERG loglevel. It uses pr_fmt() to |
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* generate the format string. |
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*/ |
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#define pr_emerg(fmt, ...) \ |
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printk(KERN_EMERG pr_fmt(fmt), ##__VA_ARGS__) |
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/** |
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* pr_alert - Print an alert-level message |
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* @fmt: format string |
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* @...: arguments for the format string |
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* |
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* This macro expands to a printk with KERN_ALERT loglevel. It uses pr_fmt() to |
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* generate the format string. |
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*/ |
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#define pr_alert(fmt, ...) \ |
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printk(KERN_ALERT pr_fmt(fmt), ##__VA_ARGS__) |
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/** |
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* pr_crit - Print a critical-level message |
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* @fmt: format string |
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* @...: arguments for the format string |
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* |
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* This macro expands to a printk with KERN_CRIT loglevel. It uses pr_fmt() to |
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* generate the format string. |
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*/ |
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#define pr_crit(fmt, ...) \ |
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printk(KERN_CRIT pr_fmt(fmt), ##__VA_ARGS__) |
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/** |
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* pr_err - Print an error-level message |
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* @fmt: format string |
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* @...: arguments for the format string |
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* |
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* This macro expands to a printk with KERN_ERR loglevel. It uses pr_fmt() to |
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* generate the format string. |
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*/ |
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#define pr_err(fmt, ...) \ |
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printk(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__) |
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/** |
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* pr_warn - Print a warning-level message |
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* @fmt: format string |
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* @...: arguments for the format string |
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* |
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* This macro expands to a printk with KERN_WARNING loglevel. It uses pr_fmt() |
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* to generate the format string. |
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*/ |
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#define pr_warn(fmt, ...) \ |
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printk(KERN_WARNING pr_fmt(fmt), ##__VA_ARGS__) |
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/** |
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* pr_notice - Print a notice-level message |
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* @fmt: format string |
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* @...: arguments for the format string |
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* |
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* This macro expands to a printk with KERN_NOTICE loglevel. It uses pr_fmt() to |
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* generate the format string. |
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*/ |
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#define pr_notice(fmt, ...) \ |
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printk(KERN_NOTICE pr_fmt(fmt), ##__VA_ARGS__) |
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/** |
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* pr_info - Print an info-level message |
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* @fmt: format string |
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* @...: arguments for the format string |
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* |
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* This macro expands to a printk with KERN_INFO loglevel. It uses pr_fmt() to |
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* generate the format string. |
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*/ |
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#define pr_info(fmt, ...) \ |
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printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__) |
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/** |
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* pr_cont - Continues a previous log message in the same line. |
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* @fmt: format string |
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* @...: arguments for the format string |
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* |
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* This macro expands to a printk with KERN_CONT loglevel. It should only be |
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* used when continuing a log message with no newline ('\n') enclosed. Otherwise |
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* it defaults back to KERN_DEFAULT loglevel. |
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*/ |
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#define pr_cont(fmt, ...) \ |
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printk(KERN_CONT fmt, ##__VA_ARGS__) |
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/** |
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* pr_devel - Print a debug-level message conditionally |
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* @fmt: format string |
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* @...: arguments for the format string |
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* |
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* This macro expands to a printk with KERN_DEBUG loglevel if DEBUG is |
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* defined. Otherwise it does nothing. |
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* |
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* It uses pr_fmt() to generate the format string. |
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*/ |
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#ifdef DEBUG |
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#define pr_devel(fmt, ...) \ |
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printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__) |
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#else |
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#define pr_devel(fmt, ...) \ |
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no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__) |
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#endif |
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/* If you are writing a driver, please use dev_dbg instead */ |
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#if defined(CONFIG_DYNAMIC_DEBUG) || \ |
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(defined(CONFIG_DYNAMIC_DEBUG_CORE) && defined(DYNAMIC_DEBUG_MODULE)) |
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#include <linux/dynamic_debug.h> |
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/** |
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* pr_debug - Print a debug-level message conditionally |
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* @fmt: format string |
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* @...: arguments for the format string |
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* |
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* This macro expands to dynamic_pr_debug() if CONFIG_DYNAMIC_DEBUG is |
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* set. Otherwise, if DEBUG is defined, it's equivalent to a printk with |
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* KERN_DEBUG loglevel. If DEBUG is not defined it does nothing. |
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* |
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* It uses pr_fmt() to generate the format string (dynamic_pr_debug() uses |
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* 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
|
|
|