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x86: nmi - unify die_nmi() interface

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By slightly changing 32bit mode die_nmi() we may unify the
interface and make it common for both (32/64bit) modes

Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: hpa@zytor.com
Cc: mingo@redhat.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Cyrill Gorcunov 2008-05-24 19:36:31 +04:00 committed by Thomas Gleixner
parent 2e4db9d2c5
commit ddca03c98a
3 changed files with 9 additions and 8 deletions
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7
arch/x86/kernel/nmi_32.c
View File

@ -320,8 +320,6 @@ void touch_nmi_watchdog(void)
}
EXPORT_SYMBOL(touch_nmi_watchdog);
extern void die_nmi(struct pt_regs *, const char *msg);
notrace __kprobes int
nmi_watchdog_tick(struct pt_regs *regs, unsigned reason)
{
@ -375,7 +373,8 @@ nmi_watchdog_tick(struct pt_regs *regs, unsigned reason)
/*
* die_nmi will return ONLY if NOTIFY_STOP happens..
*/
die_nmi(regs, "BUG: NMI Watchdog detected LOCKUP");
die_nmi("BUG: NMI Watchdog detected LOCKUP",
regs, 0);
} else {
__get_cpu_var(last_irq_sum) = sum;
local_set(&__get_cpu_var(alert_counter), 0);
@ -406,7 +405,7 @@ static int unknown_nmi_panic_callback(struct pt_regs *regs, int cpu)
char buf[64];
sprintf(buf, "NMI received for unknown reason %02x\n", reason);
die_nmi(regs, buf);
die_nmi(buf, regs, 0);
return 0;
}

8
arch/x86/kernel/traps_32.c
View File

@ -755,9 +755,9 @@ unknown_nmi_error(unsigned char reason, struct pt_regs *regs)
static DEFINE_SPINLOCK(nmi_print_lock);
void notrace __kprobes die_nmi(struct pt_regs *regs, const char *msg)
void notrace __kprobes die_nmi(char *str, struct pt_regs *regs, int do_panic)
{
if (notify_die(DIE_NMIWATCHDOG, msg, regs, 0, 2, SIGINT) == NOTIFY_STOP)
if (notify_die(DIE_NMIWATCHDOG, str, regs, 0, 2, SIGINT) == NOTIFY_STOP)
return;
spin_lock(&nmi_print_lock);
@ -766,10 +766,12 @@ void notrace __kprobes die_nmi(struct pt_regs *regs, const char *msg)
* to get a message out:
*/
bust_spinlocks(1);
printk(KERN_EMERG "%s", msg);
printk(KERN_EMERG "%s", str);
printk(" on CPU%d, ip %08lx, registers:\n",
smp_processor_id(), regs->ip);
show_registers(regs);
if (do_panic)
panic("Non maskable interrupt");
console_silent();
spin_unlock(&nmi_print_lock);
bust_spinlocks(0);

2
include/asm-x86/nmi.h
View File

@ -38,12 +38,12 @@ static inline void unset_nmi_pm_callback(struct pm_dev *dev)
#ifdef CONFIG_X86_64
extern void default_do_nmi(struct pt_regs *);
extern void die_nmi(char *str, struct pt_regs *regs, int do_panic);
extern void nmi_watchdog_default(void);
#else
#define nmi_watchdog_default() do {} while (0)
#endif
extern void die_nmi(char *str, struct pt_regs *regs, int do_panic);
extern int check_nmi_watchdog(void);
extern int nmi_watchdog_enabled;
extern int avail_to_resrv_perfctr_nmi_bit(unsigned int);