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authorHeiko Carstens <heiko.carstens@de.ibm.com>2008-04-30 13:38:37 +0200
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2008-04-30 13:38:44 +0200
commit1e489518da2a49604df2c3281034097274324be9 (patch)
treef0a6e5b9a19d2d3f8aef4ba1ad3a762e01d4e67a /arch
parent0b18d318b80a7f350648ca8f7cc00a2f688104cb (diff)
[S390] Automatically detect added cpus.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch')
-rw-r--r--arch/s390/kernel/smp.c19
1 files changed, 14 insertions, 5 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);