1 /* SPDX-License-Identifier: GPL-2.0-or-later */
3 * internal.h - printk internal definitions
5 #include <linux/percpu.h>
7 #if defined(CONFIG_PRINTK) && defined(CONFIG_SYSCTL)
8 void __init printk_sysctl_init(void);
9 int devkmsg_sysctl_set_loglvl(struct ctl_table *table, int write,
10 void *buffer, size_t *lenp, loff_t *ppos);
12 #define printk_sysctl_init() do { } while (0)
17 /* Flags for a single printk record. */
18 enum printk_info_flags {
19 LOG_NEWLINE = 2, /* text ended with a newline */
20 LOG_CONT = 8, /* text is a fragment of a continuation line */
23 extern bool block_console_kthreads;
26 int vprintk_store(int facility, int level,
27 const struct dev_printk_info *dev_info,
28 const char *fmt, va_list args);
30 __printf(1, 0) int vprintk_default(const char *fmt, va_list args);
31 __printf(1, 0) int vprintk_deferred(const char *fmt, va_list args);
33 bool printk_percpu_data_ready(void);
35 #define printk_safe_enter_irqsave(flags) \
37 local_irq_save(flags); \
38 __printk_safe_enter(); \
41 #define printk_safe_exit_irqrestore(flags) \
43 __printk_safe_exit(); \
44 local_irq_restore(flags); \
47 void defer_console_output(void);
49 u16 printk_parse_prefix(const char *text, int *level,
50 enum printk_info_flags *flags);
54 * In !PRINTK builds we still export console_sem
55 * semaphore and some of console functions (console_unlock()/etc.), so
56 * printk-safe must preserve the existing local IRQ guarantees.
58 #define printk_safe_enter_irqsave(flags) local_irq_save(flags)
59 #define printk_safe_exit_irqrestore(flags) local_irq_restore(flags)
61 static inline bool printk_percpu_data_ready(void) { return false; }
62 #endif /* CONFIG_PRINTK */