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Message-Id: <20140504154034.736854242@linuxfoundation.org>
Date: Sun, 4 May 2014 11:39:04 -0400
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
stable@...r.kernel.org, Martin Schwidefsky <schwidefsky@...ibm.com>
Subject: [PATCH 3.14 035/158] s390: fix control register update
3.14-stable review patch. If anyone has any objections, please let me know.
------------------
From: Martin Schwidefsky <schwidefsky@...ibm.com>
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@...ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
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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