diff options
| -rw-r--r-- | arch/s390/kernel/smp.c | 19 | ||||
| -rw-r--r-- | drivers/s390/char/sclp_config.c | 17 | ||||
| -rw-r--r-- | include/asm-s390/smp.h | 6 |
3 files changed, 36 insertions, 6 deletions
diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c index 6bb5c050640..0aeb290060d 100644 --- a/arch/s390/kernel/smp.c +++ b/arch/s390/kernel/smp.c @@ -505,7 +505,7 @@ out: return rc; } -static int smp_rescan_cpus(void) +static int __smp_rescan_cpus(void) { cpumask_t avail; @@ -570,7 +570,7 @@ out: kfree(info); printk(KERN_INFO "CPUs: %d configured, %d standby\n", c_cpus, s_cpus); get_online_cpus(); - smp_rescan_cpus(); + __smp_rescan_cpus(); put_online_cpus(); } @@ -1088,8 +1088,8 @@ out: } #ifdef CONFIG_HOTPLUG_CPU -static ssize_t __ref rescan_store(struct sys_device *dev, - const char *buf, size_t count) + +int smp_rescan_cpus(void) { cpumask_t newcpus; int cpu; @@ -1098,7 +1098,7 @@ static ssize_t __ref rescan_store(struct sys_device *dev, get_online_cpus(); mutex_lock(&smp_cpu_state_mutex); newcpus = cpu_present_map; - rc = smp_rescan_cpus(); + rc = __smp_rescan_cpus(); if (rc) goto out; cpus_andnot(newcpus, cpu_present_map, newcpus); @@ -1113,6 +1113,15 @@ out: put_online_cpus(); if (!cpus_empty(newcpus)) topology_schedule_update(); + return rc; +} + +static ssize_t __ref rescan_store(struct sys_device *dev, const char *buf, + size_t count) +{ + int rc; + + rc = smp_rescan_cpus(); return rc ? rc : count; } static SYSDEV_ATTR(rescan, 0200, NULL, rescan_store); diff --git a/drivers/s390/char/sclp_config.c b/drivers/s390/char/sclp_config.c index b8f35bc52b7..9e784d5f7f5 100644 --- a/drivers/s390/char/sclp_config.c +++ b/drivers/s390/char/sclp_config.c @@ -10,6 +10,7 @@ #include <linux/cpu.h> #include <linux/sysdev.h> #include <linux/workqueue.h> +#include <asm/smp.h> #include "sclp.h" #define TAG "sclp_config: " @@ -19,9 +20,11 @@ struct conf_mgm_data { u8 ev_qualifier; } __attribute__((packed)); +#define EV_QUAL_CPU_CHANGE 1 #define EV_QUAL_CAP_CHANGE 3 static struct work_struct sclp_cpu_capability_work; +static struct work_struct sclp_cpu_change_work; static void sclp_cpu_capability_notify(struct work_struct *work) { @@ -37,13 +40,24 @@ static void sclp_cpu_capability_notify(struct work_struct *work) put_online_cpus(); } +static void sclp_cpu_change_notify(struct work_struct *work) +{ + smp_rescan_cpus(); +} + static void sclp_conf_receiver_fn(struct evbuf_header *evbuf) { struct conf_mgm_data *cdata; cdata = (struct conf_mgm_data *)(evbuf + 1); - if (cdata->ev_qualifier == EV_QUAL_CAP_CHANGE) + switch (cdata->ev_qualifier) { + case EV_QUAL_CPU_CHANGE: + schedule_work(&sclp_cpu_change_work); + break; + case EV_QUAL_CAP_CHANGE: schedule_work(&sclp_cpu_capability_work); + break; + } } static struct sclp_register sclp_conf_register = @@ -57,6 +71,7 @@ static int __init sclp_conf_init(void) int rc; INIT_WORK(&sclp_cpu_capability_work, sclp_cpu_capability_notify); + INIT_WORK(&sclp_cpu_change_work, sclp_cpu_change_notify); rc = sclp_register(&sclp_conf_register); if (rc) { diff --git a/include/asm-s390/smp.h b/include/asm-s390/smp.h index 6f3821a6a90..8376b195a1b 100644 --- a/include/asm-s390/smp.h +++ b/include/asm-s390/smp.h @@ -108,5 +108,11 @@ static inline void smp_send_stop(void) #define smp_cpu_not_running(cpu) 1 #endif +#ifdef CONFIG_HOTPLUG_CPU +extern int smp_rescan_cpus(void); +#else +static inline int smp_rescan_cpus(void) { return 0; } +#endif + extern union save_area *zfcpdump_save_areas[NR_CPUS + 1]; #endif |