From a0616cdebcfd575dcd4c46102d1b52fbb827fc29 Mon Sep 17 00:00:00 2001
From: David Howells <dhowells@redhat.com>
Date: Wed, 28 Mar 2012 18:30:02 +0100
Subject: Disintegrate asm/system.h for S390

Disintegrate asm/system.h for S390.

Signed-off-by: David Howells <dhowells@redhat.com>
cc: linux-s390@vger.kernel.org
---
 arch/s390/include/asm/processor.h | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

(limited to 'arch/s390/include/asm/processor.h')

diff --git a/arch/s390/include/asm/processor.h b/arch/s390/include/asm/processor.h
index d25843a6a915..d499b30ea487 100644
--- a/arch/s390/include/asm/processor.h
+++ b/arch/s390/include/asm/processor.h
@@ -14,6 +14,7 @@
 #define __ASM_S390_PROCESSOR_H
 
 #include <linux/linkage.h>
+#include <linux/irqflags.h>
 #include <asm/cpu.h>
 #include <asm/page.h>
 #include <asm/ptrace.h>
@@ -156,6 +157,14 @@ unsigned long get_wchan(struct task_struct *p);
 #define KSTK_EIP(tsk)	(task_pt_regs(tsk)->psw.addr)
 #define KSTK_ESP(tsk)	(task_pt_regs(tsk)->gprs[15])
 
+static inline unsigned short stap(void)
+{
+	unsigned short cpu_address;
+
+	asm volatile("stap %0" : "=m" (cpu_address));
+	return cpu_address;
+}
+
 /*
  * Give up the time slice of the virtual PU.
  */
@@ -303,6 +312,21 @@ static inline void __noreturn disabled_wait(unsigned long code)
 	while (1);
 }
 
+/*
+ * Use to set psw mask except for the first byte which
+ * won't be changed by this function.
+ */
+static inline void
+__set_psw_mask(unsigned long mask)
+{
+	__load_psw_mask(mask | (arch_local_save_flags() & ~(-1UL >> 8)));
+}
+
+#define local_mcck_enable() \
+	__set_psw_mask(psw_kernel_bits | PSW_MASK_DAT | PSW_MASK_MCHECK)
+#define local_mcck_disable() \
+	__set_psw_mask(psw_kernel_bits | PSW_MASK_DAT)
+
 /*
  * Basic Machine Check/Program Check Handler.
  */
-- 
cgit v1.2.3

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