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 0x3fffffff
10 #define PRINTK_NMI_DIRECT_CONTEXT_MASK 0x40000000
11 #define PRINTK_NMI_CONTEXT_MASK 0x80000000
13 extern raw_spinlock_t logbuf_lock;
16 int vprintk_store(int facility, int level,
17 const char *dict, size_t dictlen,
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 __printf(1, 0) int vprintk_func(const char *fmt, va_list args);
23 void __printk_safe_enter(void);
24 void __printk_safe_exit(void);
26 void printk_safe_init(void);
27 bool printk_percpu_data_ready(void);
29 #define printk_safe_enter_irqsave(flags) \
31 local_irq_save(flags); \
32 __printk_safe_enter(); \
35 #define printk_safe_exit_irqrestore(flags) \
37 __printk_safe_exit(); \
38 local_irq_restore(flags); \
41 #define printk_safe_enter_irq() \
43 local_irq_disable(); \
44 __printk_safe_enter(); \
47 #define printk_safe_exit_irq() \
49 __printk_safe_exit(); \
53 void defer_console_output(void);
57 __printf(1, 0) int vprintk_func(const char *fmt, va_list args) { return 0; }
60 * In !PRINTK builds we still export logbuf_lock spin_lock, console_sem
61 * semaphore and some of console functions (console_unlock()/etc.), so
62 * printk-safe must preserve the existing local IRQ guarantees.
64 #define printk_safe_enter_irqsave(flags) local_irq_save(flags)
65 #define printk_safe_exit_irqrestore(flags) local_irq_restore(flags)
67 #define printk_safe_enter_irq() local_irq_disable()
68 #define printk_safe_exit_irq() local_irq_enable()
70 static inline void printk_safe_init(void) { }
71 static inline bool printk_percpu_data_ready(void) { return false; }
72 #endif /* CONFIG_PRINTK */