linux-kernel - [PATCH] Staging:dgap :Compression of lines for immediate return

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Message-Id: <1438018639-5376-1-git-send-email-shraddha.6596@gmail.com>
Date:	Mon, 27 Jul 2015 23:07:19 +0530
From:	Shraddha Barke <shraddha.6596@...il.com>
To:	Daeseok Youn <daeseok.youn@...il.com>,
	Mark Hounschell <markh@...pro.net>,
	Lidza Louina <lidza.louina@...il.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:	devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org,
	Shraddha Barke <shraddha.6596@...il.com>
Subject: [PATCH] Staging:dgap :Compression of lines for immediate return

This patch compresses two lines in a single line in file dgap.c
if immediate return statement is found.It also removes variable rc as
it is no longer needed.

It is done using script Coccinelle.And coccinelle uses the following
semantic patch for this compression function:

@@
expression ret;
identifier f;
@@

-ret =
+return
     f(...);
-return ret;

Signed-off-by: Shraddha Barke <shraddha.6596@...il.com>
---
 drivers/staging/dgap/dgap.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/staging/dgap/dgap.c b/drivers/staging/dgap/dgap.c
index b344e03..9112dd2 100644
--- a/drivers/staging/dgap/dgap.c
+++ b/drivers/staging/dgap/dgap.c
@@ -4953,9 +4953,8 @@ static int dgap_tty_ioctl(struct tty_struct *tty, unsigned int cmd,
 		spin_unlock_irqrestore(&ch->ch_lock, lock_flags2);
 		spin_unlock_irqrestore(&bd->bd_lock, lock_flags);
 
-		rc = put_user(C_CLOCAL(tty) ? 1 : 0,
+		return put_user(C_CLOCAL(tty) ? 1 : 0,
 				(unsigned long __user *) arg);
-		return rc;
 
 	case TIOCSSOFTCAR:
 		spin_unlock_irqrestore(&ch->ch_lock, lock_flags2);
-- 
2.1.0

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