2 * internal.h - printk internal definitions
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version 2
7 * of the License, or (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, see <http://www.gnu.org/licenses/>.
17 #include <linux/percpu.h>
21 #define PRINTK_SAFE_CONTEXT_MASK 0x3fffffff
22 #define PRINTK_NMI_DIRECT_CONTEXT_MASK 0x40000000
23 #define PRINTK_NMI_CONTEXT_MASK 0x80000000
25 extern raw_spinlock_t logbuf_lock;
28 int vprintk_store(int facility, int level,
29 const char *dict, size_t dictlen,
30 const char *fmt, va_list args);
32 __printf(1, 0) int vprintk_default(const char *fmt, va_list args);
33 __printf(1, 0) int vprintk_deferred(const char *fmt, va_list args);
34 __printf(1, 0) int vprintk_func(const char *fmt, va_list args);
35 void __printk_safe_enter(void);
36 void __printk_safe_exit(void);
38 void printk_safe_init(void);
39 bool printk_percpu_data_ready(void);
41 #define printk_safe_enter_irqsave(flags) \
43 local_irq_save(flags); \
44 __printk_safe_enter(); \
47 #define printk_safe_exit_irqrestore(flags) \
49 __printk_safe_exit(); \
50 local_irq_restore(flags); \
53 #define printk_safe_enter_irq() \
55 local_irq_disable(); \
56 __printk_safe_enter(); \
59 #define printk_safe_exit_irq() \
61 __printk_safe_exit(); \
65 void defer_console_output(void);
69 __printf(1, 0) int vprintk_func(const char *fmt, va_list args) { return 0; }
72 * In !PRINTK builds we still export logbuf_lock spin_lock, console_sem
73 * semaphore and some of console functions (console_unlock()/etc.), so
74 * printk-safe must preserve the existing local IRQ guarantees.
76 #define printk_safe_enter_irqsave(flags) local_irq_save(flags)
77 #define printk_safe_exit_irqrestore(flags) local_irq_restore(flags)
79 #define printk_safe_enter_irq() local_irq_disable()
80 #define printk_safe_exit_irq() local_irq_enable()
82 static inline void printk_safe_init(void) { }
83 static inline bool printk_percpu_data_ready(void) { return false; }
84 #endif /* CONFIG_PRINTK */