[PATCH 1/3] hisilicon: constify net_device_ops structures

From: Julia Lawall
Date: Thu Sep 15 2016 - 16:42:44 EST


Check for net_device_ops structures that are only stored in the netdev_ops
field of a net_device structure. This field is declared const, so
net_device_ops structures that have this property can be declared as const
also.

The semantic patch that makes this change is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@r disable optional_qualifier@
identifier i;
position p;
@@
static struct net_device_ops i@p = { ... };

@ok@
identifier r.i;
struct net_device e;
position p;
@@
e.netdev_ops = &i@p;

@bad@
position p != {r.p,ok.p};
identifier r.i;
struct net_device_ops e;
@@
e@i@p

@depends on !bad disable optional_qualifier@
identifier r.i;
@@
static
+const
struct net_device_ops i = { ... };
// </smpl>

The result of size on this file before the change is:

text data bss dec hex filename
7995 848 8 8851 2293
drivers/net/ethernet/hisilicon/hip04_eth.o

and after the change it is:

text data bss dec hex filename
8571 256 8 8835 2283
drivers/net/ethernet/hisilicon/hip04_eth.o

Signed-off-by: Julia Lawall <Julia.Lawall@xxxxxxx>

---
drivers/net/ethernet/hisilicon/hip04_eth.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/hisilicon/hip04_eth.c b/drivers/net/ethernet/hisilicon/hip04_eth.c
index a90ab40..415ffa1 100644
--- a/drivers/net/ethernet/hisilicon/hip04_eth.c
+++ b/drivers/net/ethernet/hisilicon/hip04_eth.c
@@ -761,7 +761,7 @@ static const struct ethtool_ops hip04_ethtool_ops = {
.get_drvinfo = hip04_get_drvinfo,
};

-static struct net_device_ops hip04_netdev_ops = {
+static const struct net_device_ops hip04_netdev_ops = {
.ndo_open = hip04_mac_open,
.ndo_stop = hip04_mac_stop,
.ndo_get_stats = hip04_get_stats,