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 0x7fffffff
22 #define PRINTK_NMI_CONTEXT_MASK 0x80000000
24 extern raw_spinlock_t logbuf_lock;
26 __printf(1, 0) int vprintk_default(const char *fmt, va_list args);
27 __printf(1, 0) int vprintk_func(const char *fmt, va_list args);
28 void __printk_safe_enter(void);
29 void __printk_safe_exit(void);
31 #define printk_safe_enter_irqsave(flags) \
33 local_irq_save(flags); \
34 __printk_safe_enter(); \
37 #define printk_safe_exit_irqrestore(flags) \
39 __printk_safe_exit(); \
40 local_irq_restore(flags); \
43 #define printk_safe_enter_irq() \
45 local_irq_disable(); \
46 __printk_safe_enter(); \
49 #define printk_safe_exit_irq() \
51 __printk_safe_exit(); \
57 __printf(1, 0) int vprintk_func(const char *fmt, va_list args) { return 0; }
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.
64 #define printk_safe_enter_irqsave(flags) local_irq_save(flags)
65 #define printk_safe_exit_irqrestore(flags) local_irq_restore(flags)
67 #define printk_safe_enter_irq() local_irq_disable()
68 #define printk_safe_exit_irq() local_irq_enable()
70 #endif /* CONFIG_PRINTK */