linux-kernel - Re: [PATCH net-next] virtio-net: mark PM functions as __maybe

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Date:   Tue, 25 Jul 2017 21:23:13 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     arnd@...db.de
Cc:     mst@...hat.com, jasowang@...hat.com, john.fastabend@...il.com,
        willemb@...gle.com, bigeasy@...utronix.de, edumazet@...gle.com,
        virtualization@...ts.linux-foundation.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next] virtio-net: mark PM functions as
 __maybe_unused

From: Arnd Bergmann <arnd@...db.de>
Date: Tue, 25 Jul 2017 17:35:50 +0200

> After removing the reset function, the freeze and restore functions
> are now unused when CONFIG_PM_SLEEP is disabled:
> 
> drivers/net/virtio_net.c:1881:12: error: 'virtnet_restore_up' defined but not used [-Werror=unused-function]
>  static int virtnet_restore_up(struct virtio_device *vdev)
> drivers/net/virtio_net.c:1859:13: error: 'virtnet_freeze_down' defined but not used [-Werror=unused-function]
>  static void virtnet_freeze_down(struct virtio_device *vdev)
> 
> A more robust way to do this is to remove the #ifdef around the callers
> and instead mark them as __maybe_unused. The compiler will now just
> silently drop the unused code.
> 
> Fixes: 4941d472bf95 ("virtio-net: do not reset during XDP set")
> Signed-off-by: Arnd Bergmann <arnd@...db.de>

Applied, thanks.