1 /* SPDX-License-Identifier: GPL-2.0-or-later */
3 * internal.h - printk internal definitions
5 #include <linux/percpu.h>
9 #define PRINTK_SAFE_CONTEXT_MASK 0x007ffffff
10 #define PRINTK_NMI_DIRECT_CONTEXT_MASK 0x008000000
11 #define PRINTK_NMI_CONTEXT_MASK 0xff0000000
13 #define PRINTK_NMI_CONTEXT_OFFSET 0x010000000
16 int vprintk_store(int facility, int level,
17 const struct dev_printk_info *dev_info,
18 const char *fmt, va_list args);
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 void __printk_safe_enter(void);
23 void __printk_safe_exit(void);
25 void printk_safe_init(void);
26 bool printk_percpu_data_ready(void);
28 #define printk_safe_enter_irqsave(flags) \
30 local_irq_save(flags); \
31 __printk_safe_enter(); \
34 #define printk_safe_exit_irqrestore(flags) \
36 __printk_safe_exit(); \
37 local_irq_restore(flags); \
40 #define printk_safe_enter_irq() \
42 local_irq_disable(); \
43 __printk_safe_enter(); \
46 #define printk_safe_exit_irq() \
48 __printk_safe_exit(); \
52 void defer_console_output(void);
57 * In !PRINTK builds we still export console_sem
58 * semaphore and some of console functions (console_unlock()/etc.), so
59 * printk-safe must preserve the existing local IRQ guarantees.
61 #define printk_safe_enter_irqsave(flags) local_irq_save(flags)
62 #define printk_safe_exit_irqrestore(flags) local_irq_restore(flags)
64 #define printk_safe_enter_irq() local_irq_disable()
65 #define printk_safe_exit_irq() local_irq_enable()
67 static inline void printk_safe_init(void) { }
68 static inline bool printk_percpu_data_ready(void) { return false; }
69 #endif /* CONFIG_PRINTK */