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From: Bhumika Goyal <bhumirks@gmail.com>
To: julia.lawall@lip6.fr, dan.carpenter@oracle.com,
	davem@davemloft.net, netdev@vger.kernel.org,
	linux-kernel@vger.kernel.org
Cc: Bhumika Goyal <bhumirks@gmail.com>
Subject: [PATCH v2] net: moxa: constify net_device_ops structures
Date: Sat, 21 Jan 2017 12:27:26 +0530	[thread overview]
Message-ID: <1484981846-29736-1-git-send-email-bhumirks@gmail.com> (raw)

Declare net_device_ops structure as const as it is only stored in
the netdev_ops field of a net_device structure. This field is of type
const, so net_device_ops structures having same properties can be made
const too.
Done using Coccinelle:

@r1 disable optional_qualifier@
identifier i;
position p;
@@
static struct net_device_ops i@p={...};

@ok1@
identifier r1.i;
position p;
struct net_device ndev;
@@
ndev.netdev_ops=&i@p

@bad@
position p!={r1.p,ok1.p};
identifier r1.i;
@@
i@p

@depends on !bad disable optional_qualifier@
identifier r1.i;
@@
+const
struct net_device_ops i;

File size before:
   text	   data	    bss	    dec	    hex	filename
   4821	    744	      0	   5565	   15bd ethernet/moxa/moxart_ether.o

File size after:
   text	   data	    bss	    dec	    hex	filename
   5373	    192	      0	   5565	   15bd ethernet/moxa/moxart_ether.o

Signed-off-by: Bhumika Goyal <bhumirks@gmail.com>
---
Changes in v2:
* Corrected the commit message.

 drivers/net/ethernet/moxa/moxart_ether.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/moxa/moxart_ether.c b/drivers/net/ethernet/moxa/moxart_ether.c
index 9774b50..6a6525f 100644
--- a/drivers/net/ethernet/moxa/moxart_ether.c
+++ b/drivers/net/ethernet/moxa/moxart_ether.c
@@ -436,7 +436,7 @@ static void moxart_mac_set_rx_mode(struct net_device *ndev)
 	spin_unlock_irq(&priv->txlock);
 }
 
-static struct net_device_ops moxart_netdev_ops = {
+static const struct net_device_ops moxart_netdev_ops = {
 	.ndo_open		= moxart_mac_open,
 	.ndo_stop		= moxart_mac_stop,
 	.ndo_start_xmit		= moxart_mac_start_xmit,
-- 
1.9.1

             reply	other threads:[~2017-01-21  6:58 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-01-21  6:57 Bhumika Goyal [this message]
2017-01-23 21:00 ` [PATCH v2] net: moxa: constify net_device_ops structures David Miller

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