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[S390] Automatically detect added cpus.

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Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Heiko Carstens
2008-04-30 13:38:37 +02:00
committed by Martin Schwidefsky
parent 0b18d318b8
commit 1e489518da
3 changed files with 36 additions and 6 deletions
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19
arch/s390/kernel/smp.c
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@@ -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);