linux-kernel - [PATCH 3/3] kdbus: optimize if statements in kdbus_conn

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Message-Id: <1434561298-4576-4-git-send-email-sergei@s15v.net>
Date:	Wed, 17 Jun 2015 20:14:58 +0300
From:	Sergei Zviagintsev <sergei@...v.net>
To:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Daniel Mack <daniel@...que.org>,
	David Herrmann <dh.herrmann@...glemail.com>,
	Djalal Harouni <tixxdz@...ndz.org>
Cc:	linux-kernel@...r.kernel.org, Sergei Zviagintsev <sergei@...v.net>
Subject: [PATCH 3/3] kdbus: optimize if statements in kdbus_conn_disconnect()

if (r->sync) branch and code after it both call kdbus_reply_unlink().
Rewrite them as if-else to eliminate code duplication and make algorithm
more obvious.

Convert outer if statement to use continue in order to reduce
indentation and make things easier to read.

Signed-off-by: Sergei Zviagintsev <sergei@...v.net>
---
 ipc/kdbus/connection.c | 15 +++++++--------
 1 file changed, 7 insertions(+), 8 deletions(-)

diff --git a/ipc/kdbus/connection.c b/ipc/kdbus/connection.c
index 707be050b408..9993753d11de 100644
--- a/ipc/kdbus/connection.c
+++ b/ipc/kdbus/connection.c
@@ -559,17 +559,16 @@ int kdbus_conn_disconnect(struct kdbus_conn *conn, bool ensure_queue_empty)
 	hash_for_each(bus->conn_hash, i, c, hentry) {
 		mutex_lock(&c->lock);
 		list_for_each_entry_safe(r, r_tmp, &c->reply_list, entry) {
-			if (r->reply_src == conn) {
-				if (r->sync) {
-					kdbus_sync_reply_wakeup(r, -EPIPE);
-					kdbus_reply_unlink(r);
-					continue;
-				}
+			if (r->reply_src != conn)
+				continue;
 
+			if (r->sync)
+				kdbus_sync_reply_wakeup(r, -EPIPE);
+			else
 				/* send a 'connection dead' notification */
 				kdbus_notify_reply_dead(bus, c->id, r->cookie);
-				kdbus_reply_unlink(r);
-			}
+
+			kdbus_reply_unlink(r);
 		}
 		mutex_unlock(&c->lock);
 	}
-- 
1.8.3.1

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