[PATCH 1/6] staging: slicoss: constify ethtool_ops structures

Julia Lawall
2016-08-31T07:50:59Z

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/staging/slicoss/slicoss.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/staging/slicoss/slicoss.c b/drivers/staging/slicoss/slicoss.c
index 7834bda..21280a3 100644
--- a/drivers/staging/slicoss/slicoss.c
+++ b/drivers/staging/slicoss/slicoss.c
@@ -124,7 +124,7 @@ static const struct pci_device_id slic_pci_tbl[] = {
{ 0 }
};

-static struct ethtool_ops slic_ethtool_ops;
+static const struct ethtool_ops slic_ethtool_ops;

MODULE_DEVICE_TABLE(pci, slic_pci_tbl);

@@ -3128,7 +3128,7 @@ static void __exit slic_module_cleanup(void)
pci_unregister_driver(&slic_driver);
}

-static struct ethtool_ops slic_ethtool_ops = {
+static const struct ethtool_ops slic_ethtool_ops = {
.get_coalesce = slic_get_coalesce,
.set_coalesce = slic_set_coalesce
};