projects / thirdparty / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 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 | ||
| ab6f762f SS |
26 | void printk_safe_init(void); |
| 27 | bool printk_percpu_data_ready(void); | |
| 28 | ||
| 099f1c84 SS |
29 | #define printk_safe_enter_irqsave(flags) \ |
| 30 | do { \ | |
| 31 | local_irq_save(flags); \ | |
| 32 | __printk_safe_enter(); \ | |
| 33 | } while (0) | |
| 34 | ||
| 35 | #define printk_safe_exit_irqrestore(flags) \ | |
| 36 | do { \ | |
| 37 | __printk_safe_exit(); \ | |
| 38 | local_irq_restore(flags); \ | |
| 39 | } while (0) | |
| 40 | ||
| 41 | #define printk_safe_enter_irq() \ | |
| 42 | do { \ | |
| 43 | local_irq_disable(); \ | |
| 44 | __printk_safe_enter(); \ | |
| 45 | } while (0) | |
| 46 | ||
| 47 | #define printk_safe_exit_irq() \ | |
| 48 | do { \ | |
| 49 | __printk_safe_exit(); \ | |
| 50 | local_irq_enable(); \ | |
| 51 | } while (0) | |
| 52 | ||
| 03fc7f9c PM |
53 | void defer_console_output(void); |
| 54 | ||
| 099f1c84 SS |
55 | #else |
| 56 | ||
| 57 | __printf(1, 0) int vprintk_func(const char *fmt, va_list args) { return 0; } | |
| 58 | ||
| 59 | /* | |
| 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. | |
| 63 | */ | |
| 64 | #define printk_safe_enter_irqsave(flags) local_irq_save(flags) | |
| 65 | #define printk_safe_exit_irqrestore(flags) local_irq_restore(flags) | |
| 66 | ||
| 67 | #define printk_safe_enter_irq() local_irq_disable() | |
| 68 | #define printk_safe_exit_irq() local_irq_enable() | |
| 69 | ||
| ab6f762f SS |
70 | static inline void printk_safe_init(void) { } |
| 71 | static inline bool printk_percpu_data_ready(void) { return false; } | |
| 099f1c84 | 72 | #endif /* CONFIG_PRINTK */ |