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authorHeiko Carstens <heiko.carstens@de.ibm.com>2009-06-12 10:26:25 +0200
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2009-06-12 10:27:30 +0200
commit7757591ab4a36314a258e181dbf0994415c288c2 (patch)
tree99b414c90dbc7889f7738a795122805f167a00af /arch/s390/include
parentd90cbd469c9c7c1494fc2084af9319e6a557368b (diff)
[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>
Diffstat (limited to 'arch/s390/include')
-rw-r--r--arch/s390/include/asm/compat.h19
1 files changed, 18 insertions, 1 deletions
diff --git a/arch/s390/include/asm/compat.h b/arch/s390/include/asm/compat.h
index de065b32381..01a08020bc0 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 @@ static inline compat_uptr_t ptr_to_compat(void __user *uptr)
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);
}