From 1943f53c9ca182fa233e5a17e89ef8e421d7819e Mon Sep 17 00:00:00 2001 From: Michael Holzheu Date: Sun, 30 Oct 2011 15:16:38 +0100 Subject: [S390] Force PSW restart on online CPU PSW restart can be triggered on offline CPUs. If this happens, currently the PSW restart code fails, because functions like smp_processor_id() do not work on offline CPUs. This patch fixes this as follows: If PSW restart is triggered on an offline CPU, the PSW restart (sigp restart) is done a second time on another CPU that is online and the old CPU is stopped afterwards. Signed-off-by: Michael Holzheu Signed-off-by: Martin Schwidefsky --- arch/s390/include/asm/smp.h | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'arch/s390/include') diff --git a/arch/s390/include/asm/smp.h b/arch/s390/include/asm/smp.h index 045e009fc164..ab47a69fdf07 100644 --- a/arch/s390/include/asm/smp.h +++ b/arch/s390/include/asm/smp.h @@ -33,6 +33,7 @@ extern struct save_area *zfcpdump_save_areas[NR_CPUS + 1]; extern void smp_switch_to_ipl_cpu(void (*func)(void *), void *); extern void smp_switch_to_cpu(void (*)(void *), void *, unsigned long sp, int from, int to); +extern void smp_restart_with_online_cpu(void); extern void smp_restart_cpu(void); /* @@ -64,6 +65,10 @@ static inline void smp_switch_to_ipl_cpu(void (*func)(void *), void *data) func(data); } +static inline void smp_restart_with_online_cpu(void) +{ +} + #define smp_vcpu_scheduled (1) #endif /* CONFIG_SMP */ -- cgit v1.2.1