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From:   Dexuan Cui <decui@microsoft.com>
To:     Arnd Bergmann <arnd@arndb.de>, KY Srinivasan <kys@microsoft.com>,
        Haiyang Zhang <haiyangz@microsoft.com>,
        Stephen Hemminger <sthemmin@microsoft.com>,
        Sasha Levin <sashal@kernel.org>
CC:     Michael Kelley <mikelley@microsoft.com>,
        "linux-hyperv@vger.kernel.org" <linux-hyperv@vger.kernel.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: RE: [PATCH] hv: vmbus: mark PM functions as __maybe_unused
Thread-Topic: [PATCH] hv: vmbus: mark PM functions as __maybe_unused
Thread-Index: AQHVblvNo7VNLrxiR0GbRPiaLz1gQ6cydNCQ
Date:   Thu, 19 Sep 2019 05:15:03 +0000
Message-ID: <PU1P153MB0169B746C28A10A941E48F0ABF890@PU1P153MB0169.APCP153.PROD.OUTLOOK.COM>
References: <20190918200052.2261769-1-arnd@arndb.de>
In-Reply-To: <20190918200052.2261769-1-arnd@arndb.de>
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> From: Arnd Bergmann <arnd@arndb.de>
> Sent: Wednesday, September 18, 2019 1:01 PM
>=20
> When CONFIG_PM is disabled, we get a couple of harmless warnings:
>=20
> drivers/hv/vmbus_drv.c:918:12: error: unused function 'vmbus_suspend'
> [-Werror,-Wunused-function]
> drivers/hv/vmbus_drv.c:937:12: error: unused function 'vmbus_resume'
> [-Werror,-Wunused-function]
> drivers/hv/vmbus_drv.c:2128:12: error: unused function 'vmbus_bus_suspend=
'
> [-Werror,-Wunused-function]
> drivers/hv/vmbus_drv.c:2208:12: error: unused function 'vmbus_bus_resume'
> [-Werror,-Wunused-function]
>=20
> Mark these functions __maybe_unused to let gcc drop them silently.

Hi Arnd,
Thanks for reporting the issue!

If CONFIG_PM is not set, IMO it's better to comment out these functions. :-=
)

I'll post a patch for this with you Cc'd.

Thanks,
-- Dexuan