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[2/6] net: ethernet: et131x: constify ethtool_ops structures

Message ID 1472628648-3603-3-git-send-email-Julia.Lawall@lip6.fr
State Accepted, archived
Delegated to: David Miller
Headers show

Commit Message

Julia Lawall Aug. 31, 2016, 7:30 a.m. UTC
Check for ethtool_ops structures that are only stored in the ethtool_ops
field of a net_device structure or passed as the second argument to
netdev_set_default_ethtool_ops.  These contexts are declared const, so
ethtool_ops structures that have these properties 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 ethtool_ops i@p = { ... };

@ok1@
identifier r.i;
struct net_device e;
position p;
@@
e.ethtool_ops = &i@p;

@ok2@
identifier r.i;
expression e;
position p;
@@
netdev_set_default_ethtool_ops(e, &i@p)

@bad@
position p != {r.p,ok1.p,ok2.p};
identifier r.i;
@@
i@p

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

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>

---
 drivers/net/ethernet/agere/et131x.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Comments

Mark Einon Aug. 31, 2016, 11:48 a.m. UTC | #1
On Wed, Aug 31, 2016 at 09:30:44AM +0200, Julia Lawall wrote:
> Check for ethtool_ops structures that are only stored in the ethtool_ops
> field of a net_device structure or passed as the second argument to
> netdev_set_default_ethtool_ops.  These contexts are declared const, so
> ethtool_ops structures that have these properties 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 ethtool_ops i@p = { ... };
> 
> @ok1@
> identifier r.i;
> struct net_device e;
> position p;
> @@
> e.ethtool_ops = &i@p;
> 
> @ok2@
> identifier r.i;
> expression e;
> position p;
> @@
> netdev_set_default_ethtool_ops(e, &i@p)
> 
> @bad@
> position p != {r.p,ok1.p,ok2.p};
> identifier r.i;
> @@
> i@p
> 
> @depends on !bad disable optional_qualifier@
> identifier r.i;
> @@
> static
> +const
>  struct ethtool_ops i = { ... };
> // </smpl>
> 
> Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>

Looks good, thanks.

Acked-by: Mark Einon <mark.einon@gmail.com>
diff mbox

Patch

diff --git a/drivers/net/ethernet/agere/et131x.c b/drivers/net/ethernet/agere/et131x.c
index c83ebae..9066838 100644
--- a/drivers/net/ethernet/agere/et131x.c
+++ b/drivers/net/ethernet/agere/et131x.c
@@ -2961,7 +2961,7 @@  static void et131x_get_drvinfo(struct net_device *netdev,
 		sizeof(info->bus_info));
 }
 
-static struct ethtool_ops et131x_ethtool_ops = {
+static const struct ethtool_ops et131x_ethtool_ops = {
 	.get_drvinfo	= et131x_get_drvinfo,
 	.get_regs_len	= et131x_get_regs_len,
 	.get_regs	= et131x_get_regs,