From a05c90f1948baacedd0c3e7e3250225be4cae727 Mon Sep 17 00:00:00 2001
From: Heiko Carstens <heiko.carstens@de.ibm.com>
Date: Wed, 12 Jan 2011 09:55:29 +0100
Subject: [PATCH] [S390] Add is_32bit_task() helper function

Helper function which tells us if a task is running in ESA mode.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
---
 arch/s390/include/asm/compat.h      | 2 +-
 arch/s390/include/asm/thread_info.h | 6 ++++++
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/arch/s390/include/asm/compat.h b/arch/s390/include/asm/compat.h
index a875c2f542e1..da359ca6fe55 100644
--- a/arch/s390/include/asm/compat.h
+++ b/arch/s390/include/asm/compat.h
@@ -169,7 +169,7 @@ static inline compat_uptr_t ptr_to_compat(void __user *uptr)
 
 static inline int is_compat_task(void)
 {
-	return test_thread_flag(TIF_31BIT);
+	return is_32bit_task();
 }
 
 #else
diff --git a/arch/s390/include/asm/thread_info.h b/arch/s390/include/asm/thread_info.h
index ebc77091466f..ad1382f7932e 100644
--- a/arch/s390/include/asm/thread_info.h
+++ b/arch/s390/include/asm/thread_info.h
@@ -118,6 +118,12 @@ static inline struct thread_info *current_thread_info(void)
 #define _TIF_SINGLE_STEP	(1<<TIF_FREEZE)
 #define _TIF_FREEZE		(1<<TIF_FREEZE)
 
+#ifdef CONFIG_64BIT
+#define is_32bit_task()		(test_thread_flag(TIF_31BIT))
+#else
+#define is_32bit_task()		(1)
+#endif
+
 #endif /* __KERNEL__ */
 
 #define PREEMPT_ACTIVE		0x4000000
-- 
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