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authorMichael Holzheu <holzheu@linux.vnet.ibm.com>2011-10-30 15:16:38 +0100
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2011-10-30 15:16:41 +0100
commit1943f53c9ca182fa233e5a17e89ef8e421d7819e (patch)
tree198ebf12ab17cdc6bdd12386fad95d9c09fb3c83 /arch/s390/include/asm/smp.h
parent[S390] kdump: Add size to elfcorehdr kernel parameter (diff)
downloadlinux-1943f53c9ca182fa233e5a17e89ef8e421d7819e.tar.xz
linux-1943f53c9ca182fa233e5a17e89ef8e421d7819e.zip
[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 <holzheu@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/include/asm/smp.h')
-rw-r--r--arch/s390/include/asm/smp.h5
1 files changed, 5 insertions, 0 deletions
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 */