'struct i2c_algorithm' and 'struct virtio_device_id' are not modified in
this driver.
Constifying this structure moves some data to a read-only section, so
increase overall security, especially when the structure holds some
function pointers, which is the case for struct i2c_algorithm.
On a x86_64, with allmodconfig:
Before:
======
text data bss dec hex filename
6663 568 16 7247 1c4f drivers/i2c/busses/i2c-virtio.o
After:
=====
text data bss dec hex filename
6735 472 16 7223 1c37 drivers/i2c/busses/i2c-virtio.o
Signed-off-by: Christophe JAILLET <christophe.jaillet@xxxxxxxxxx>
--
Compile tested only
---
drivers/i2c/busses/i2c-virtio.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/i2c/busses/i2c-virtio.c b/drivers/i2c/busses/i2c-virtio.c
index 52ba1e0845ca..2a351f961b89 100644
--- a/drivers/i2c/busses/i2c-virtio.c
+++ b/drivers/i2c/busses/i2c-virtio.c
@@ -182,7 +182,7 @@ static u32 virtio_i2c_func(struct i2c_adapter *adap)
return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL;
}
-static struct i2c_algorithm virtio_algorithm = {
+static const struct i2c_algorithm virtio_algorithm = {
.xfer = virtio_i2c_xfer,
.functionality = virtio_i2c_func,
};
@@ -237,7 +237,7 @@ static void virtio_i2c_remove(struct virtio_device *vdev)
virtio_i2c_del_vqs(vdev);
}
-static struct virtio_device_id id_table[] = {
+static const struct virtio_device_id id_table[] = {
{ VIRTIO_ID_I2C_ADAPTER, VIRTIO_DEV_ANY_ID },
{}
};
--
2.46.0
