In uniprocessor configurations, synchronize_irq() is defined in
<linux/hardirq.h> as a macro, and this function definition fails to
compile.
Reported-by: kbuild test robot <fengguang.wu@xxxxxxxxx>
Signed-off-by: Ben Hutchings <ben@xxxxxxxxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx # 3.9
---
arch/s390/kernel/irq.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/arch/s390/kernel/irq.c b/arch/s390/kernel/irq.c
index 408e866..dd3c199 100644
--- a/arch/s390/kernel/irq.c
+++ b/arch/s390/kernel/irq.c
@@ -312,6 +312,7 @@ void measurement_alert_subclass_unregister(void)
}
EXPORT_SYMBOL(measurement_alert_subclass_unregister);
+#ifdef CONFIG_SMP
void synchronize_irq(unsigned int irq)
{
/*
@@ -320,6 +321,7 @@ void synchronize_irq(unsigned int irq)
*/
}
EXPORT_SYMBOL_GPL(synchronize_irq);
+#endif
#ifndef CONFIG_PCI
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