From: Martin Schwidefsky <schwidefsky@de.ibm.com>
Date: Tue, 3 Dec 2013 10:09:10 +0000 (+0100)
Subject: s390/ptrace: simplify enable/disable single step
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=1c182a628075af7431edb8155601740867b5ae51;p=linux-beck.git

s390/ptrace: simplify enable/disable single step

The user_enable_single_step() and user_disable_sindle_step() functions
are always called on the inferior, never for the currently active
process. Remove the unnecessary check for the current process and
the update_cr_regs() call from the enable/disable functions.

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

diff --git a/arch/s390/kernel/ptrace.c b/arch/s390/kernel/ptrace.c
index e65c91c591e8..c369a26d1d56 100644
--- a/arch/s390/kernel/ptrace.c
+++ b/arch/s390/kernel/ptrace.c
@@ -107,15 +107,11 @@ void update_cr_regs(struct task_struct *task)
 void user_enable_single_step(struct task_struct *task)
 {
 	set_tsk_thread_flag(task, TIF_SINGLE_STEP);
-	if (task == current)
-		update_cr_regs(task);
 }
 
 void user_disable_single_step(struct task_struct *task)
 {
 	clear_tsk_thread_flag(task, TIF_SINGLE_STEP);
-	if (task == current)
-		update_cr_regs(task);
 }
 
 /*