1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /* 3 * internal.h - printk internal definitions 4 */ 5 #include <linux/percpu.h> 6 7 #ifdef CONFIG_PRINTK 8 9 /* Flags for a single printk record. */ 10 enum printk_info_flags { 11 LOG_NEWLINE = 2, /* text ended with a newline */ 12 LOG_CONT = 8, /* text is a fragment of a continuation line */ 13 }; 14 15 __printf(4, 0) 16 int vprintk_store(int facility, int level, 17 const struct dev_printk_info *dev_info, 18 const char *fmt, va_list args); 19 20 __printf(1, 0) int vprintk_default(const char *fmt, va_list args); 21 __printf(1, 0) int vprintk_deferred(const char *fmt, va_list args); 22 23 bool printk_percpu_data_ready(void); 24 25 #define printk_safe_enter_irqsave(flags) \ 26 do { \ 27 local_irq_save(flags); \ 28 __printk_safe_enter(); \ 29 } while (0) 30 31 #define printk_safe_exit_irqrestore(flags) \ 32 do { \ 33 __printk_safe_exit(); \ 34 local_irq_restore(flags); \ 35 } while (0) 36 37 void defer_console_output(void); 38 39 u16 printk_parse_prefix(const char *text, int *level, 40 enum printk_info_flags *flags); 41 #else 42 43 /* 44 * In !PRINTK builds we still export console_sem 45 * semaphore and some of console functions (console_unlock()/etc.), so 46 * printk-safe must preserve the existing local IRQ guarantees. 47 */ 48 #define printk_safe_enter_irqsave(flags) local_irq_save(flags) 49 #define printk_safe_exit_irqrestore(flags) local_irq_restore(flags) 50 51 static inline bool printk_percpu_data_ready(void) { return false; } 52 #endif /* CONFIG_PRINTK */ 53