diff options
| -rw-r--r-- | arch/s390/kernel/smp.c | 56 |
1 files changed, 7 insertions, 49 deletions
diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c index b05ae858425..264ea906db4 100644 --- a/arch/s390/kernel/smp.c +++ b/arch/s390/kernel/smp.c @@ -193,72 +193,30 @@ int smp_call_function_single(int cpu, void (*func) (void *info), void *info, } EXPORT_SYMBOL(smp_call_function_single); -static void do_send_stop(void) +void smp_send_stop(void) { int cpu, rc; - /* stop all processors */ - for_each_online_cpu(cpu) { - if (cpu == smp_processor_id()) - continue; - do { - rc = signal_processor(cpu, sigp_stop); - } while (rc == sigp_busy); - } -} + /* Disable all interrupts/machine checks */ + __load_psw_mask(psw_kernel_bits & ~PSW_MASK_MCHECK); -static void do_store_status(void) -{ - int cpu, rc; + /* write magic number to zero page (absolute 0) */ + lowcore_ptr[smp_processor_id()]->panic_magic = __PANIC_MAGIC; - /* store status of all processors in their lowcores (real 0) */ + /* stop all processors */ for_each_online_cpu(cpu) { if (cpu == smp_processor_id()) continue; do { - rc = signal_processor_p( - (__u32)(unsigned long) lowcore_ptr[cpu], cpu, - sigp_store_status_at_address); + rc = signal_processor(cpu, sigp_stop); } while (rc == sigp_busy); - } -} -static void do_wait_for_stop(void) -{ - int cpu; - - /* Wait for all other cpus to enter stopped state */ - for_each_online_cpu(cpu) { - if (cpu == smp_processor_id()) - continue; while (!smp_cpu_not_running(cpu)) cpu_relax(); } } /* - * this function sends a 'stop' sigp to all other CPUs in the system. - * it goes straight through. - */ -void smp_send_stop(void) -{ - /* Disable all interrupts/machine checks */ - __load_psw_mask(psw_kernel_bits & ~PSW_MASK_MCHECK); - - /* write magic number to zero page (absolute 0) */ - lowcore_ptr[smp_processor_id()]->panic_magic = __PANIC_MAGIC; - - /* stop other processors. */ - do_send_stop(); - - /* wait until other processors are stopped */ - do_wait_for_stop(); - - /* store status of other processors. */ - do_store_status(); -} - -/* * Reboot, halt and power_off routines for SMP. */ void machine_restart_smp(char *__unused) |