linux-kernel - [PATCH 5/7] drivers/net/ixgb/ixgb

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Date:	Sat, 15 Mar 2008 17:04:13 +0100 (CET)
From:	Julia Lawall <julia@...u.dk>
To:	jeffrey.t.kirsher@...el.com, ayyappan.veeraiyan@...el.com,
	john.ronciak@...el.com, jesse.brandeburg@...el.com,
	auke-jan.h.kok@...el.com, e1000-devel@...ts.sourceforge.net,
	linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org
Subject: [PATCH 5/7] drivers/net/ixgb/ixgb_main.c: remove unused variable

From: Julia Lawall <julia@...u.dk>

The variable num_group_tail_writes is initialized but never used otherwise.

The semantic patch that makes this change is as follows:
(http://www.emn.fr/x-info/coccinelle/)

// <smpl>
@@
type T;
identifier i;
constant C;
@@

(
extern T i;
|
- T i;
  <+... when != i
- i = C;
  ...+>
)
// </smpl>

Signed-off-by: Julia Lawall <julia@...u.dk>
---
 drivers/net/ixgb/ixgb_main.c |    2 --
 1 file changed, 2 deletions(-)

diff -u -p a/drivers/net/ixgb/ixgb_main.c b/drivers/net/ixgb/ixgb_main.c
--- a/drivers/net/ixgb/ixgb_main.c 2008-03-12 14:13:13.000000000 +0100
+++ b/drivers/net/ixgb/ixgb_main.c 2008-03-15 11:16:23.000000000 +0100
@@ -2088,14 +2088,12 @@ ixgb_alloc_rx_buffers(struct ixgb_adapte
 	struct ixgb_buffer *buffer_info;
 	struct sk_buff *skb;
 	unsigned int i;
-	int num_group_tail_writes;
 	long cleancount;
 
 	i = rx_ring->next_to_use;
 	buffer_info = &rx_ring->buffer_info[i];
 	cleancount = IXGB_DESC_UNUSED(rx_ring);
 
-	num_group_tail_writes = IXGB_RX_BUFFER_WRITE;
 
 	/* leave three descriptors unused */
 	while(--cleancount > 2) {
--
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