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- /* 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 0x007ffffff
- #define PRINTK_NMI_DIRECT_CONTEXT_MASK 0x008000000
- #define PRINTK_NMI_CONTEXT_MASK 0xff0000000
- #define PRINTK_NMI_CONTEXT_OFFSET 0x010000000
- extern raw_spinlock_t logbuf_lock;
- __printf(4, 0)
- int vprintk_store(int facility, int level,
- const struct dev_printk_info *dev_info,
- 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);
- void printk_safe_init(void);
- bool printk_percpu_data_ready(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()
- static inline void printk_safe_init(void) { }
- static inline bool printk_percpu_data_ready(void) { return false; }
- #endif /* CONFIG_PRINTK */
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