When compiling with clang and W=1, the following warning is generated: drivers/ata/sata_rcar.c:878:15: error: cast to smaller integer type 'enum sata_rcar_type' from 'const void *' [-Werror,-Wvoid-pointer-to-enum-cast] priv->type = (enum sata_rcar_type)of_device_get_match_data(dev); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Fix this by using a cast to unsigned long to match the "void *" type size returned by of_device_get_match_data(). Signed-off-by: Damien Le Moal <damien.lemoal@xxxxxxxxxxxxxxxxxx> --- drivers/ata/sata_rcar.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/ata/sata_rcar.c b/drivers/ata/sata_rcar.c index 590ebea99601..0195eb29f6c2 100644 --- a/drivers/ata/sata_rcar.c +++ b/drivers/ata/sata_rcar.c @@ -875,7 +875,7 @@ static int sata_rcar_probe(struct platform_device *pdev) if (!priv) return -ENOMEM; - priv->type = (enum sata_rcar_type)of_device_get_match_data(dev); + priv->type = (unsigned long)of_device_get_match_data(dev); pm_runtime_enable(dev); ret = pm_runtime_get_sync(dev); -- 2.37.3