linux-kernel - [PATCH 01/17] ptrace: remove silly wait_trap variable from ptrace

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Date:	Mon, 30 May 2011 01:12:24 +0200
From:	Tejun Heo <tj@...nel.org>
To:	oleg@...hat.com
Cc:	vda.linux@...glemail.com, jan.kratochvil@...hat.com,
	linux-kernel@...r.kernel.org, torvalds@...ux-foundation.org,
	akpm@...ux-foundation.org, indan@....nu, bdonlan@...il.com,
	pedro@...esourcery.com, Tejun Heo <tj@...nel.org>
Subject: [PATCH 01/17] ptrace: remove silly wait_trap variable from ptrace_attach()

Local variable wait_trap is used to determine whether to call
wait_event() on TRAPPING or not, which doesn't change or optimize
anything.  Remove it.

Signed-off-by: Tejun Heo <tj@...nel.org>
---
 kernel/ptrace.c |    7 ++-----
 1 files changed, 2 insertions(+), 5 deletions(-)

diff --git a/kernel/ptrace.c b/kernel/ptrace.c
index 2df1157..389497b 100644
--- a/kernel/ptrace.c
+++ b/kernel/ptrace.c
@@ -184,7 +184,6 @@ bool ptrace_may_access(struct task_struct *task, unsigned int mode)
 
 static int ptrace_attach(struct task_struct *task)
 {
-	bool wait_trap = false;
 	int retval;
 
 	audit_ptrace(task);
@@ -246,7 +245,6 @@ static int ptrace_attach(struct task_struct *task)
 	if (task_is_stopped(task)) {
 		task->group_stop |= GROUP_STOP_PENDING | GROUP_STOP_TRAPPING;
 		signal_wake_up(task, 1);
-		wait_trap = true;
 	}
 
 	spin_unlock(&task->sighand->siglock);
@@ -257,9 +255,8 @@ unlock_tasklist:
 unlock_creds:
 	mutex_unlock(&task->signal->cred_guard_mutex);
 out:
-	if (wait_trap)
-		wait_event(current->signal->wait_chldexit,
-			   !(task->group_stop & GROUP_STOP_TRAPPING));
+	wait_event(current->signal->wait_chldexit,
+		   !(task->group_stop & GROUP_STOP_TRAPPING));
 	return retval;
 }
 
-- 
1.7.5.2

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