s390/smp: get rid of compile warning

Add missing #ifdep CONFIG_HOTPLUG_CPU to get rid of this one:
arch/s390/kernel/smp.c:229:13: warning: 'pcpu_free_lowcore'
                               defined but not used [-Wunused-function]

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c
index 1f77227669e84145385706f39faaf205524e144d..e505458c6899e1fe95cba3e122f586e4f30b0d9d 100644 (file)
--- a/arch/s390/kernel/smp.c
+++ b/arch/s390/kernel/smp.c
@@ -226,6 +226,8 @@ out:
        return -ENOMEM;
 }
 
+#ifdef CONFIG_HOTPLUG_CPU
+
 static void pcpu_free_lowcore(struct pcpu *pcpu)
 {
        pcpu_sigp_retry(pcpu, sigp_set_prefix, 0);
@@ -247,6 +249,8 @@ static void pcpu_free_lowcore(struct pcpu *pcpu)
        }
 }
 
+#endif /* CONFIG_HOTPLUG_CPU */
+
 static void pcpu_prepare_secondary(struct pcpu *pcpu, int cpu)
 {
        struct _lowcore *lc = pcpu->lowcore;