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Tip revision: e73f0f0ee7541171d89f2e2491130c7771ba58d3 authored by Linus Torvalds on 11 July 2021, 22:07:40 UTC
Linux 5.14-rc1
Linux 5.14-rc1
Tip revision: e73f0f0
internal.h
/* 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
__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);
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
/*
* In !PRINTK builds we still export 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 */