ptp: Fix dp83640 build warning when building statically

If the dp83640 driver is not built as a module, the
MODULE_DEVICE_TABLE reference to dp83640_tbl nops out.

Since the table isn't referenced elsewhere, it it causes
the following warning:
drivers/net/phy/dp83640.c:1095: warning: ‘dp83640_tbl’ defined but not used

This apparently is common with mdio_device_id table structures,
and is avoided by using __maybe_unused annotation.

Signed-off-by: John Stultz <john.stultz@linaro.org>

diff --git a/drivers/net/phy/dp83640.c b/drivers/net/phy/dp83640.c
index d463b8a4afa10b96449c9fb3259a44076ec0eb5f..b0c9522bb535293ff72f304ddf2c77fe1a7524e6 100644 (file)
--- a/drivers/net/phy/dp83640.c
+++ b/drivers/net/phy/dp83640.c
@@ -1092,7 +1092,7 @@ MODULE_LICENSE("GPL");
 module_init(dp83640_init);
 module_exit(dp83640_exit);
 
-static struct mdio_device_id dp83640_tbl[] = {
+static struct mdio_device_id __maybe_unused dp83640_tbl[] = {
        { DP83640_PHY_ID, 0xfffffff0 },
        { }
 };