linux-kernel - [PATCH] hwrng: omap3-rom - Fix unused function warnings

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Message-Id: <20191022142741.1794378-1-arnd@arndb.de>
Date:   Tue, 22 Oct 2019 16:27:31 +0200
From:   Arnd Bergmann <arnd@...db.de>
To:     Matt Mackall <mpm@...enic.com>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        Arnd Bergmann <arnd@...db.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Aaro Koskinen <aaro.koskinen@....fi>,
        Adam Ford <aford173@...il.com>,
        Pali Rohár <pali.rohar@...il.com>,
        Sebastian Reichel <sre@...nel.org>,
        Tero Kristo <t-kristo@...com>,
        Tony Lindgren <tony@...mide.com>,
        Rob Herring <robh@...nel.org>, linux-crypto@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] hwrng: omap3-rom - Fix unused function warnings

When runtime-pm is disabled, we get a few harmless warnings:

drivers/char/hw_random/omap3-rom-rng.c:65:12: error: unused function 'omap_rom_rng_runtime_suspend' [-Werror,-Wunused-function]
drivers/char/hw_random/omap3-rom-rng.c:81:12: error: unused function 'omap_rom_rng_runtime_resume' [-Werror,-Wunused-function]

Mark these functions as __maybe_unused so gcc can drop them
silently.

Fixes: 8d9d4bdc495f ("hwrng: omap3-rom - Use runtime PM instead of custom functions")
Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 drivers/char/hw_random/omap3-rom-rng.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/char/hw_random/omap3-rom-rng.c b/drivers/char/hw_random/omap3-rom-rng.c
index 0b90983c95c8..e08a8887e718 100644
--- a/drivers/char/hw_random/omap3-rom-rng.c
+++ b/drivers/char/hw_random/omap3-rom-rng.c
@@ -62,7 +62,7 @@ static int omap3_rom_rng_read(struct hwrng *rng, void *data, size_t max, bool w)
 	return r;
 }
 
-static int omap_rom_rng_runtime_suspend(struct device *dev)
+static int __maybe_unused omap_rom_rng_runtime_suspend(struct device *dev)
 {
 	struct omap_rom_rng *ddata;
 	int r;
@@ -78,7 +78,7 @@ static int omap_rom_rng_runtime_suspend(struct device *dev)
 	return 0;
 }
 
-static int omap_rom_rng_runtime_resume(struct device *dev)
+static int __maybe_unused omap_rom_rng_runtime_resume(struct device *dev)
 {
 	struct omap_rom_rng *ddata;
 	int r;
-- 
2.20.0