From c6b5b847a7cf11f131c43fe0041443ec11697fc7 Mon Sep 17 00:00:00 2001
From: Heiko Carstens <heiko.carstens@de.ibm.com>
Date: Mon, 4 Dec 2006 15:40:33 +0100
Subject: [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>
---
 include/asm-s390/smp.h | 8 ++++++++
 1 file changed, 8 insertions(+)

(limited to 'include')

diff --git a/include/asm-s390/smp.h b/include/asm-s390/smp.h
index c3cf030ada4..7097c96ed02 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 @@ smp_call_function_on(void (*func) (void *info), void *info,
 	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; })
-- 
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