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