[S390] implement is_compat_task
Implement is_compat_task and use it all over the place.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
diff --git a/arch/s390/include/asm/compat.h b/arch/s390/include/asm/compat.h
index de065b3..01a0802 100644
--- a/arch/s390/include/asm/compat.h
+++ b/arch/s390/include/asm/compat.h
@@ -5,6 +5,7 @@
*/
#include <linux/types.h>
#include <linux/sched.h>
+#include <linux/thread_info.h>
#define PSW32_MASK_PER 0x40000000UL
#define PSW32_MASK_DAT 0x04000000UL
@@ -163,12 +164,28 @@
return (u32)(unsigned long)uptr;
}
+#ifdef CONFIG_COMPAT
+
+static inline int is_compat_task(void)
+{
+ return test_thread_flag(TIF_31BIT);
+}
+
+#else
+
+static inline int is_compat_task(void)
+{
+ return 0;
+}
+
+#endif
+
static inline void __user *compat_alloc_user_space(long len)
{
unsigned long stack;
stack = KSTK_ESP(current);
- if (test_thread_flag(TIF_31BIT))
+ if (is_compat_task())
stack &= 0x7fffffffUL;
return (void __user *) (stack - len);
}
