linux-kernel - [UNNECESSARY PATCH 14/16] signal: Convert for (;;) to do {} while

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Message-Id: <017139b38b6f7d9163c6d8ccbce8b3ea61c734c6.1416167046.git.joe@perches.com>
Date:	Sun, 16 Nov 2014 12:09:21 -0800
From:	Joe Perches <joe@...ches.com>
To:	Ionut Alexa <ionut.m.alexa@...il.com>, linux-kernel@...r.kernel.org
Cc:	Al Viro <viro@...IV.linux.org.uk>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: [UNNECESSARY PATCH 14/16] signal: Convert for (;;) to do {} while

So the return value is at end of the function.

No change of compiled x86-64 object.

Signed-off-by: Joe Perches <joe@...ches.com>
---
 kernel/signal.c | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/kernel/signal.c b/kernel/signal.c
index 9b133eb..739d261 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -1345,21 +1345,21 @@ int kill_pid_info(int sig, struct siginfo *info, struct pid *pid)
 	int error = -ESRCH;
 	struct task_struct *p;
 
-	for (;;) {
+	do {
 		rcu_read_lock();
 		p = pid_task(pid, PIDTYPE_PID);
 		if (p)
 			error = group_send_sig_info(sig, info, p);
 		rcu_read_unlock();
-		if (likely(!p || error != -ESRCH))
-			return error;
 
 		/*
-		 * The task was unhashed in between, try again.  If it
-		 * is dead, pid_task() will return NULL, if we race with
-		 * de_thread() it will find the new leader.
+		 * If the task is dead, pid_task() will return NULL
+		 * If we race with de_thread() it will find the new leader.
+		 * The task was unhashed in between, try again.
 		 */
-	}
+	} while (unlikely(p && error == -ESRCH));
+
+	return error;
 }
 
 int kill_proc_info(int sig, struct siginfo *info, pid_t pid)
-- 
2.1.2

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