diff options
Diffstat (limited to 'arch/cris')
| -rw-r--r-- | arch/cris/arch-v32/kernel/time.c | 28 |
1 files changed, 17 insertions, 11 deletions
diff --git a/arch/cris/arch-v32/kernel/time.c b/arch/cris/arch-v32/kernel/time.c index 73745ce79f6c..eb74dabbeb96 100644 --- a/arch/cris/arch-v32/kernel/time.c +++ b/arch/cris/arch-v32/kernel/time.c @@ -57,7 +57,6 @@ static int __init etrax_init_cont_rotime(void) } arch_initcall(etrax_init_cont_rotime); - unsigned long timer_regs[NR_CPUS] = { regi_timer0, @@ -69,9 +68,8 @@ unsigned long timer_regs[NR_CPUS] = extern int set_rtc_mmss(unsigned long nowtime); #ifdef CONFIG_CPU_FREQ -static int -cris_time_freq_notifier(struct notifier_block *nb, unsigned long val, - void *data); +static int cris_time_freq_notifier(struct notifier_block *nb, + unsigned long val, void *data); static struct notifier_block cris_time_freq_notifier_block = { .notifier_call = cris_time_freq_notifier, @@ -88,7 +86,6 @@ unsigned long get_ns_in_jiffie(void) return ns; } - /* From timer MDS describing the hardware watchdog: * 4.3.1 Watchdog Operation * The watchdog timer is an 8-bit timer with a configurable start value. @@ -110,11 +107,18 @@ static short int watchdog_key = 42; /* arbitrary 7 bit number */ * is used though, so set this really low. */ #define WATCHDOG_MIN_FREE_PAGES 8 +/* for reliable NICE_DOGGY behaviour */ +static int bite_in_progress; + void reset_watchdog(void) { #if defined(CONFIG_ETRAX_WATCHDOG) reg_timer_rw_wd_ctrl wd_ctrl = { 0 }; +#if defined(CONFIG_ETRAX_WATCHDOG_NICE_DOGGY) + if (unlikely(bite_in_progress)) + return; +#endif /* Only keep watchdog happy as long as we have memory left! */ if(nr_free_pages() > WATCHDOG_MIN_FREE_PAGES) { /* Reset the watchdog with the inverse of the old key */ @@ -149,7 +153,9 @@ void handle_watchdog_bite(struct pt_regs *regs) #if defined(CONFIG_ETRAX_WATCHDOG) extern int cause_of_death; + nmi_enter(); oops_in_progress = 1; + bite_in_progress = 1; printk(KERN_WARNING "Watchdog bite\n"); /* Check if forced restart or unexpected watchdog */ @@ -171,6 +177,7 @@ void handle_watchdog_bite(struct pt_regs *regs) printk(KERN_WARNING "Oops: bitten by watchdog\n"); show_registers(regs); oops_in_progress = 0; + printk("\n"); /* Flush mtdoops. */ #ifndef CONFIG_ETRAX_WATCHDOG_NICE_DOGGY reset_watchdog(); #endif @@ -203,7 +210,7 @@ static inline irqreturn_t timer_interrupt(int irq, void *dev_id) /* Reset watchdog otherwise it resets us! */ reset_watchdog(); - /* Update statistics. */ + /* Update statistics. */ update_process_times(user_mode(regs)); cris_do_profile(regs); /* Save profiling information */ @@ -214,7 +221,7 @@ static inline irqreturn_t timer_interrupt(int irq, void *dev_id) /* Call the real timer interrupt handler */ xtime_update(1); - return IRQ_HANDLED; + return IRQ_HANDLED; } /* Timer is IRQF_SHARED so drivers can add stuff to the timer irq chain. */ @@ -294,14 +301,13 @@ void __init time_init(void) #ifdef CONFIG_CPU_FREQ cpufreq_register_notifier(&cris_time_freq_notifier_block, - CPUFREQ_TRANSITION_NOTIFIER); + CPUFREQ_TRANSITION_NOTIFIER); #endif } #ifdef CONFIG_CPU_FREQ -static int -cris_time_freq_notifier(struct notifier_block *nb, unsigned long val, - void *data) +static int cris_time_freq_notifier(struct notifier_block *nb, + unsigned long val, void *data) { struct cpufreq_freqs *freqs = data; if (val == CPUFREQ_POSTCHANGE) { |