From: Martin Schwidefsky <schwidefsky@de.ibm.com>
Date: Mon, 20 Feb 2017 08:51:36 +0000 (+0100)
Subject: s390/syscall: fix single stepped system calls
X-Git-Tag: v4.14-rc1~1462^2
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=d24b98e3a9c66b16ed029e1b2bcdf3c90e9d82d9;p=platform%2Fkernel%2Flinux-rpi.git

s390/syscall: fix single stepped system calls

Fix PER tracing of system calls after git commit 34525e1f7e8dc478
"s390: store breaking event address only for program checks"
broke it.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
---

diff --git a/arch/s390/kernel/entry.S b/arch/s390/kernel/entry.S
index 34ab7e8..db469fa 100644
--- a/arch/s390/kernel/entry.S
+++ b/arch/s390/kernel/entry.S
@@ -545,6 +545,7 @@ ENTRY(pgm_check_handler)
 #
 .Lpgm_svcper:
 	mvc	__LC_RETURN_PSW(8),__LC_SVC_NEW_PSW
+	lghi	%r13,__TASK_thread
 	larl	%r14,.Lsysc_per
 	stg	%r14,__LC_RETURN_PSW+8
 	lghi	%r14,_PIF_SYSCALL | _PIF_PER_TRAP