[S390] cpu shutdown rework
Let one master cpu kill all other cpus instead of sending an external
interrupt to all other cpus so they can kill themselves.
Simplifies reipl/shutdown functions a lot.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
diff --git a/include/asm-s390/smp.h b/include/asm-s390/smp.h
index c3cf030..7097c96 100644
--- a/include/asm-s390/smp.h
+++ b/include/asm-s390/smp.h
@@ -18,6 +18,7 @@
#include <asm/lowcore.h>
#include <asm/sigp.h>
+#include <asm/ptrace.h>
/*
s390 specific smp.c headers
@@ -101,6 +102,13 @@
func(info);
return 0;
}
+
+static inline void smp_send_stop(void)
+{
+ /* Disable all interrupts/machine checks */
+ __load_psw_mask(PSW_KERNEL_BITS & ~PSW_MASK_MCHECK);
+}
+
#define smp_cpu_not_running(cpu) 1
#define smp_get_cpu(cpu) ({ 0; })
#define smp_put_cpu(cpu) ({ 0; })