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
printk_percpu_data_ready(void)51 static inline bool printk_percpu_data_ready(void) { return false; }
52 #endif /* CONFIG_PRINTK */
53