Commit | Line | Data |
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1ccea77e | 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
42a0bb3f PM |
2 | /* |
3 | * internal.h - printk internal definitions | |
42a0bb3f PM |
4 | */ |
5 | #include <linux/percpu.h> | |
6 | ||
099f1c84 SS |
7 | #ifdef CONFIG_PRINTK |
8 | ||
719f6a70 | 9 | #define PRINTK_SAFE_CONTEXT_MASK 0x3fffffff |
03fc7f9c | 10 | #define PRINTK_NMI_DIRECT_CONTEXT_MASK 0x40000000 |
719f6a70 | 11 | #define PRINTK_NMI_CONTEXT_MASK 0x80000000 |
099f1c84 SS |
12 | |
13 | extern raw_spinlock_t logbuf_lock; | |
14 | ||
03fc7f9c PM |
15 | __printf(5, 0) |
16 | int vprintk_store(int facility, int level, | |
17 | const char *dict, size_t dictlen, | |
18 | const char *fmt, va_list args); | |
19 | ||
099f1c84 | 20 | __printf(1, 0) int vprintk_default(const char *fmt, va_list args); |
719f6a70 | 21 | __printf(1, 0) int vprintk_deferred(const char *fmt, va_list args); |
099f1c84 SS |
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); | |
25 | ||
26 | #define printk_safe_enter_irqsave(flags) \ | |
27 | do { \ | |
28 | local_irq_save(flags); \ | |
29 | __printk_safe_enter(); \ | |
30 | } while (0) | |
31 | ||
32 | #define printk_safe_exit_irqrestore(flags) \ | |
33 | do { \ | |
34 | __printk_safe_exit(); \ | |
35 | local_irq_restore(flags); \ | |
36 | } while (0) | |
37 | ||
38 | #define printk_safe_enter_irq() \ | |
39 | do { \ | |
40 | local_irq_disable(); \ | |
41 | __printk_safe_enter(); \ | |
42 | } while (0) | |
43 | ||
44 | #define printk_safe_exit_irq() \ | |
45 | do { \ | |
46 | __printk_safe_exit(); \ | |
47 | local_irq_enable(); \ | |
48 | } while (0) | |
49 | ||
03fc7f9c PM |
50 | void defer_console_output(void); |
51 | ||
099f1c84 SS |
52 | #else |
53 | ||
54 | __printf(1, 0) int vprintk_func(const char *fmt, va_list args) { return 0; } | |
55 | ||
56 | /* | |
57 | * In !PRINTK builds we still export logbuf_lock spin_lock, console_sem | |
58 | * semaphore and some of console functions (console_unlock()/etc.), so | |
59 | * printk-safe must preserve the existing local IRQ guarantees. | |
60 | */ | |
61 | #define printk_safe_enter_irqsave(flags) local_irq_save(flags) | |
62 | #define printk_safe_exit_irqrestore(flags) local_irq_restore(flags) | |
63 | ||
64 | #define printk_safe_enter_irq() local_irq_disable() | |
65 | #define printk_safe_exit_irq() local_irq_enable() | |
66 | ||
67 | #endif /* CONFIG_PRINTK */ |