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From:   Arnd Bergmann <arnd@arndb.de>
To:     Sakari Ailus <sakari.ailus@linux.intel.com>,
        Mauro Carvalho Chehab <mchehab@kernel.org>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc:     Arnd Bergmann <arnd@arndb.de>, Yong Zhi <yong.zhi@intel.com>,
        Tomasz Figa <tfiga@chromium.org>,
        Tian Shu Qiu <tian.shu.qiu@intel.com>,
        Bingbu Cao <bingbu.cao@intel.com>, linux-media@vger.kernel.org,
        devel@driverdev.osuosl.org, linux-kernel@vger.kernel.org
Subject: [PATCH] media: staging/intel-ipu3: mark PM function as __maybe_unused
Date:   Mon,  4 Mar 2019 21:29:10 +0100
Message-Id: <20190304202920.1845797-1-arnd@arndb.de>
MIME-Version: 1.0
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Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

The imgu_rpm_dummy_cb() looks like an API misuse that is explained
in the comment above it. Aside from that, it also causes a warning
when power management support is disabled:

drivers/staging/media/ipu3/ipu3.c:794:12: error: 'imgu_rpm_dummy_cb' defined but not used [-Werror=unused-function]

The warning is at least easy to fix by marking the function as
__maybe_unused.

Fixes: 7fc7af649ca7 ("media: staging/intel-ipu3: Add imgu top level pci device driver")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 drivers/staging/media/ipu3/ipu3.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/staging/media/ipu3/ipu3.c b/drivers/staging/media/ipu3/ipu3.c
index d575ac78c8f0..d00d26264c37 100644
--- a/drivers/staging/media/ipu3/ipu3.c
+++ b/drivers/staging/media/ipu3/ipu3.c
@@ -791,7 +791,7 @@ static int __maybe_unused imgu_resume(struct device *dev)
  * PCI rpm framework checks the existence of driver rpm callbacks.
  * Place a dummy callback here to avoid rpm going into error state.
  */
-static int imgu_rpm_dummy_cb(struct device *dev)
+static __maybe_unused int imgu_rpm_dummy_cb(struct device *dev)
 {
 	return 0;
 }
-- 
2.20.0