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s390: fix control register update

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The git commit c63badebfe
"s390: optimize control register update" broke the update for
control register 0. After the update do the lctlg from the correct
value.

Cc: <stable@vger.kernel.org> # 3.14
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Martin Schwidefsky 2014-04-01 13:45:33 +02:00
parent 75ff24fa52
commit a8a934e44f
1 changed files with 1 additions and 1 deletions
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2
arch/s390/kernel/ptrace.c
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@ -64,7 +64,7 @@ void update_cr_regs(struct task_struct *task)
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;