Merge commit 'origin/master' into next

[pandora-kernel.git] / arch / s390 / include / asm / system.h

diff --git a/arch/s390/include/asm/system.h b/arch/s390/include/asm/system.h
index 3a8b26e..4fb83c1 100644 (file)
--- a/arch/s390/include/asm/system.h
+++ b/arch/s390/include/asm/system.h
@@ -1,11 +1,7 @@
 /*
- *  include/asm-s390/system.h
+ * Copyright IBM Corp. 1999, 2009
  *
- *  S390 version
- *    Copyright (C) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation
- *    Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com),
- *
- *  Derived from "include/asm-i386/system.h"
+ * Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>
  */
 
 #ifndef __ASM_SYSTEM_H
@@ -469,6 +465,20 @@ extern psw_t sysc_restore_trace_psw;
 extern psw_t io_restore_trace_psw;
 #endif
 
+static inline int tprot(unsigned long addr)
+{
+       int rc = -EFAULT;
+
+       asm volatile(
+               "       tprot   0(%1),0\n"
+               "0:     ipm     %0\n"
+               "       srl     %0,28\n"
+               "1:\n"
+               EX_TABLE(0b,1b)
+               : "+d" (rc) : "a" (addr) : "cc");
+       return rc;
+}
+
 #endif /* __KERNEL__ */
 
 #endif