commit a05c90f1948baacedd0c3e7e3250225be4cae727
author Heiko Carstens <heiko.carstens@de.ibm.com> Wed Jan 12 09:55:29 2011 +0100
committer Martin Schwidefsky <sky@mschwide.boeblingen.de.ibm.com> Wed Jan 12 09:55:25 2011 +0100
tree 4c3f2e2b692c1b4915b8bef40ad591dfc3e7edcc
parent 9887a1fcddef1386d3387edf6497d08670460edb

[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/thread_info.h

diff --git a/arch/s390/include/asm/thread_info.h b/arch/s390/include/asm/thread_info.h
index ebc77091..ad1382f 100644
--- a/arch/s390/include/asm/thread_info.h
+++ b/arch/s390/include/asm/thread_info.h
@@ -118,6 +118,12 @@
 #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