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-rw-r--r--arch/s390/kernel/smp.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c
index c932caa5e85..c699ac538c4 100644
--- a/arch/s390/kernel/smp.c
+++ b/arch/s390/kernel/smp.c
@@ -638,6 +638,8 @@ void __cpu_die(unsigned int cpu)
/* Wait until target cpu is down */
while (!cpu_stopped(cpu))
cpu_relax();
+ while (signal_processor_p(0, cpu, sigp_set_prefix) == sigp_busy)
+ udelay(10);
smp_free_lowcore(cpu);
pr_info("Processor %d stopped\n", cpu);
}