/*
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* internal.h - printk internal definitions
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include <linux/percpu.h>
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typedef __printf(1, 0) int (*printk_func_t)(const char *fmt, va_list args);
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int __printf(1, 0) vprintk_default(const char *fmt, va_list args);
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#ifdef CONFIG_PRINTK_NMI
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extern raw_spinlock_t logbuf_lock;
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/*
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* printk() could not take logbuf_lock in NMI context. Instead,
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* it temporary stores the strings into a per-CPU buffer.
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* The alternative implementation is chosen transparently
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* via per-CPU variable.
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*/
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DECLARE_PER_CPU(printk_func_t, printk_func);
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static inline __printf(1, 0) int vprintk_func(const char *fmt, va_list args)
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{
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return this_cpu_read(printk_func)(fmt, args);
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}
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extern atomic_t nmi_message_lost;
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static inline int get_nmi_message_lost(void)
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{
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return atomic_xchg(&nmi_message_lost, 0);
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}
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#else /* CONFIG_PRINTK_NMI */
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static inline __printf(1, 0) int vprintk_func(const char *fmt, va_list args)
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{
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return vprintk_default(fmt, args);
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}
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static inline int get_nmi_message_lost(void)
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{
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return 0;
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}
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#endif /* CONFIG_PRINTK_NMI */
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