[PATCH 3.14 035/158] s390: fix control register update

[Greg Kroah-Hartman]

3.14-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Martin Schwidefsky <schwidefsky@xxxxxxxxxx>

commit a8a934e44f2bd0ed613e1aa0471e3478c6a9228a upstream.

The git commit c63badebfebacdba827ab1cc1d420fc81bd8d818
"s390: optimize control register update" broke the update for
control register 0. After the update do the lctlg from the correct
value.

Signed-off-by: Martin Schwidefsky <schwidefsky@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 arch/s390/kernel/ptrace.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/arch/s390/kernel/ptrace.c
+++ b/arch/s390/kernel/ptrace.c
@@ -64,7 +64,7 @@ void update_cr_regs(struct task_struct *
 		if (task->thread.per_flags & PER_FLAG_NO_TE)
 			cr_new &= ~(1UL << 55);
 		if (cr_new != cr)
-			__ctl_load(cr, 0, 0);
+			__ctl_load(cr_new, 0, 0);
 		/* Set or clear transaction execution TDC bits 62 and 63. */
 		__ctl_store(cr, 2, 2);
 		cr_new = cr & ~3UL;


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