| /* SPDX-License-Identifier: GPL-2.0-or-later */ |
| /* |
| * internal.h - printk internal definitions |
| */ |
| #include <linux/percpu.h> |
| |
| #ifdef CONFIG_PRINTK |
| |
| #define PRINTK_SAFE_CONTEXT_MASK 0x3fffffff |
| #define PRINTK_NMI_DIRECT_CONTEXT_MASK 0x40000000 |
| #define PRINTK_NMI_CONTEXT_MASK 0x80000000 |
| |
| extern raw_spinlock_t logbuf_lock; |
| |
| __printf(5, 0) |
| int vprintk_store(int facility, int level, |
| const char *dict, size_t dictlen, |
| const char *fmt, va_list args); |
| |
| __printf(1, 0) int vprintk_default(const char *fmt, va_list args); |
| __printf(1, 0) int vprintk_deferred(const char *fmt, va_list args); |
| __printf(1, 0) int vprintk_func(const char *fmt, va_list args); |
| void __printk_safe_enter(void); |
| void __printk_safe_exit(void); |
| |
| #define printk_safe_enter_irqsave(flags) \ |
| do { \ |
| local_irq_save(flags); \ |
| __printk_safe_enter(); \ |
| } while (0) |
| |
| #define printk_safe_exit_irqrestore(flags) \ |
| do { \ |
| __printk_safe_exit(); \ |
| local_irq_restore(flags); \ |
| } while (0) |
| |
| #define printk_safe_enter_irq() \ |
| do { \ |
| local_irq_disable(); \ |
| __printk_safe_enter(); \ |
| } while (0) |
| |
| #define printk_safe_exit_irq() \ |
| do { \ |
| __printk_safe_exit(); \ |
| local_irq_enable(); \ |
| } while (0) |
| |
| void defer_console_output(void); |
| |
| #else |
| |
| __printf(1, 0) int vprintk_func(const char *fmt, va_list args) { return 0; } |
| |
| /* |
| * In !PRINTK builds we still export logbuf_lock spin_lock, console_sem |
| * semaphore and some of console functions (console_unlock()/etc.), so |
| * printk-safe must preserve the existing local IRQ guarantees. |
| */ |
| #define printk_safe_enter_irqsave(flags) local_irq_save(flags) |
| #define printk_safe_exit_irqrestore(flags) local_irq_restore(flags) |
| |
| #define printk_safe_enter_irq() local_irq_disable() |
| #define printk_safe_exit_irq() local_irq_enable() |
| |
| #endif /* CONFIG_PRINTK */ |