diff options
| -rw-r--r-- | arch/mips/Kconfig | 1 | ||||
| -rw-r--r-- | arch/mips/kernel/smp.c | 43 |
2 files changed, 44 insertions, 0 deletions
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig index 322bbe12412e..5cdc53b1ba56 100644 --- a/arch/mips/Kconfig +++ b/arch/mips/Kconfig @@ -51,6 +51,7 @@ config MIPS select HAVE_DEBUG_STACKOVERFLOW select HAVE_CC_STACKPROTECTOR select CPU_PM if CPU_IDLE + select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST menu "Machine selection" diff --git a/arch/mips/kernel/smp.c b/arch/mips/kernel/smp.c index 0a022ee33b2a..9a5226443bc1 100644 --- a/arch/mips/kernel/smp.c +++ b/arch/mips/kernel/smp.c @@ -404,3 +404,46 @@ void dump_send_ipi(void (*dump_ipi_callback)(void *)) } EXPORT_SYMBOL(dump_send_ipi); #endif + +#ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST + +static DEFINE_PER_CPU(atomic_t, tick_broadcast_count); +static DEFINE_PER_CPU(struct call_single_data, tick_broadcast_csd); + +void tick_broadcast(const struct cpumask *mask) +{ + atomic_t *count; + struct call_single_data *csd; + int cpu; + + for_each_cpu(cpu, mask) { + count = &per_cpu(tick_broadcast_count, cpu); + csd = &per_cpu(tick_broadcast_csd, cpu); + + if (atomic_inc_return(count) == 1) + smp_call_function_single_async(cpu, csd); + } +} + +static void tick_broadcast_callee(void *info) +{ + int cpu = smp_processor_id(); + tick_receive_broadcast(); + atomic_set(&per_cpu(tick_broadcast_count, cpu), 0); +} + +static int __init tick_broadcast_init(void) +{ + struct call_single_data *csd; + int cpu; + + for (cpu = 0; cpu < NR_CPUS; cpu++) { + csd = &per_cpu(tick_broadcast_csd, cpu); + csd->func = tick_broadcast_callee; + } + + return 0; +} +early_initcall(tick_broadcast_init); + +#endif /* CONFIG_GENERIC_CLOCKEVENTS_BROADCAST */ |