hwrng: st - Fix W=1 unused variable warning

[ Upstream commit ad23756271d5744a0a0ba556f8aaa70e358d5aa6 ]

This patch fixes an unused variable warning when this driver is
built-in with CONFIG_OF=n.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Stable-dep-of: 501e197a02d4 ("hwrng: st - keep clock enabled while hwrng is registered")
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/char/hw_random/st-rng.c b/drivers/char/hw_random/st-rng.c
index 863448360a7dacf4bb6076ab5347a6a3280ac6ed..50975e761ca58129a25fa022e7a1d65ab4928493 100644 (file)
--- a/drivers/char/hw_random/st-rng.c
+++ b/drivers/char/hw_random/st-rng.c
@@ -12,6 +12,7 @@
 #include <linux/delay.h>
 #include <linux/hw_random.h>
 #include <linux/io.h>
+#include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/of.h>
 #include <linux/platform_device.h>
@@ -123,7 +124,7 @@ static int st_rng_remove(struct platform_device *pdev)
        return 0;
 }
 
-static const struct of_device_id st_rng_match[] = {
+static const struct of_device_id st_rng_match[] __maybe_unused = {
        { .compatible = "st,rng" },
        {},
 };