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
15 /* Flags for a single printk record. */
16 enum printk_info_flags {
17 LOG_NEWLINE = 2, /* text ended with a newline */
18 LOG_CONT = 8, /* text is a fragment of a continuation line */
22 int vprintk_store(int facility, int level,
23 const struct dev_printk_info *dev_info,
24 const char *fmt, va_list args);
26 __printf(1, 0) int vprintk_default(const char *fmt, va_list args);
27 __printf(1, 0) int vprintk_deferred(const char *fmt, va_list args);
28 void __printk_safe_enter(void);
29 void __printk_safe_exit(void);
31 void printk_safe_init(void);
32 bool printk_percpu_data_ready(void);
34 #define printk_safe_enter_irqsave(flags) \
36 local_irq_save(flags); \
37 __printk_safe_enter(); \
40 #define printk_safe_exit_irqrestore(flags) \
42 __printk_safe_exit(); \
43 local_irq_restore(flags); \
46 #define printk_safe_enter_irq() \
48 local_irq_disable(); \
49 __printk_safe_enter(); \
52 #define printk_safe_exit_irq() \
54 __printk_safe_exit(); \
58 void defer_console_output(void);
63 * In !PRINTK builds we still export console_sem
64 * semaphore and some of console functions (console_unlock()/etc.), so
65 * printk-safe must preserve the existing local IRQ guarantees.
67 #define printk_safe_enter_irqsave(flags) local_irq_save(flags)
68 #define printk_safe_exit_irqrestore(flags) local_irq_restore(flags)
70 #define printk_safe_enter_irq() local_irq_disable()
71 #define printk_safe_exit_irq() local_irq_enable()
73 static inline void printk_safe_init(void) { }
74 static inline bool printk_percpu_data_ready(void) { return false; }
75 #endif /* CONFIG_PRINTK */