The driver can match only via the DT table so the table should be always used and the of_match_ptr does not have any sense (this also allows ACPI matching via PRP0001, even though it might not be relevant here). drivers/hwspinlock/omap_hwspinlock.c:164:34: error: ‘omap_hwspinlock_of_match’ defined but not used [-Werror=unused-const-variable=] Reviewed-by: Baolin Wang <baolin.wang@xxxxxxxxxxxxxxxxx> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxx> --- drivers/hwspinlock/omap_hwspinlock.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/hwspinlock/omap_hwspinlock.c b/drivers/hwspinlock/omap_hwspinlock.c index 1fb3a2550e29..dfe82952671b 100644 --- a/drivers/hwspinlock/omap_hwspinlock.c +++ b/drivers/hwspinlock/omap_hwspinlock.c @@ -174,7 +174,7 @@ static struct platform_driver omap_hwspinlock_driver = { .remove = omap_hwspinlock_remove, .driver = { .name = "omap_hwspinlock", - .of_match_table = of_match_ptr(omap_hwspinlock_of_match), + .of_match_table = omap_hwspinlock_of_match, }, }; -- 2.34.1