projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 42a0bb3f PM |
1 | /* |
| 2 | * internal.h - printk internal definitions | |
| 3 | * | |
| 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. | |
| 8 | * | |
| 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. | |
| 13 | * | |
| 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/>. | |
| 16 | */ | |
| 17 | #include <linux/percpu.h> | |
| 18 | ||
| 099f1c84 SS |
19 | #ifdef CONFIG_PRINTK |
| 20 | ||
| 719f6a70 PM |
21 | #define PRINTK_SAFE_CONTEXT_MASK 0x3fffffff |
| 22 | #define PRINTK_NMI_DEFERRED_CONTEXT_MASK 0x40000000 | |
| 23 | #define PRINTK_NMI_CONTEXT_MASK 0x80000000 | |
| 099f1c84 SS |
24 | |
| 25 | extern raw_spinlock_t logbuf_lock; | |
| 26 | ||
| 27 | __printf(1, 0) int vprintk_default(const char *fmt, va_list args); | |
| 719f6a70 | 28 | __printf(1, 0) int vprintk_deferred(const char *fmt, va_list args); |
| 099f1c84 SS |
29 | __printf(1, 0) int vprintk_func(const char *fmt, va_list args); |
| 30 | void __printk_safe_enter(void); | |
| 31 | void __printk_safe_exit(void); | |
| 32 | ||
| 33 | #define printk_safe_enter_irqsave(flags) \ | |
| 34 | do { \ | |
| 35 | local_irq_save(flags); \ | |
| 36 | __printk_safe_enter(); \ | |
| 37 | } while (0) | |
| 38 | ||
| 39 | #define printk_safe_exit_irqrestore(flags) \ | |
| 40 | do { \ | |
| 41 | __printk_safe_exit(); \ | |
| 42 | local_irq_restore(flags); \ | |
| 43 | } while (0) | |
| 44 | ||
| 45 | #define printk_safe_enter_irq() \ | |
| 46 | do { \ | |
| 47 | local_irq_disable(); \ | |
| 48 | __printk_safe_enter(); \ | |
| 49 | } while (0) | |
| 50 | ||
| 51 | #define printk_safe_exit_irq() \ | |
| 52 | do { \ | |
| 53 | __printk_safe_exit(); \ | |
| 54 | local_irq_enable(); \ | |
| 55 | } while (0) | |
| 56 | ||
| 57 | #else | |
| 58 | ||
| 59 | __printf(1, 0) int vprintk_func(const char *fmt, va_list args) { return 0; } | |
| 60 | ||
| 61 | /* | |
| 62 | * In !PRINTK builds we still export logbuf_lock spin_lock, console_sem | |
| 63 | * semaphore and some of console functions (console_unlock()/etc.), so | |
| 64 | * printk-safe must preserve the existing local IRQ guarantees. | |
| 65 | */ | |
| 66 | #define printk_safe_enter_irqsave(flags) local_irq_save(flags) | |
| 67 | #define printk_safe_exit_irqrestore(flags) local_irq_restore(flags) | |
| 68 | ||
| 69 | #define printk_safe_enter_irq() local_irq_disable() | |
| 70 | #define printk_safe_exit_irq() local_irq_enable() | |
| 71 | ||
| 72 | #endif /* CONFIG_PRINTK */ |