netdev - Re: [PATCH drivers/net] #ifdef mdio_bus_phy_suspend() and mdio_bus_phy

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Message-ID: <20210303181535.GF2696@paulmck-ThinkPad-P72>
Date:   Wed, 3 Mar 2021 10:15:35 -0800
From:   "Paul E. McKenney" <paulmck@...nel.org>
To:     Russell King - ARM Linux admin <linux@...linux.org.uk>
Cc:     andrew@...n.ch, hkallweit1@...il.com, davem@...emloft.net,
        kuba@...nel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, kernel-team@...com
Subject: Re: [PATCH drivers/net] #ifdef mdio_bus_phy_suspend() and
 mdio_bus_phy_suspend()

On Wed, Mar 03, 2021 at 06:04:22PM +0000, Russell King - ARM Linux admin wrote:
> On Wed, Mar 03, 2021 at 09:53:38AM -0800, Paul E. McKenney wrote:
> > drivers/net: #ifdef mdio_bus_phy_suspend() and mdio_bus_phy_suspend()
> > 
> > The following build error is emitted by rcutorture builds of v5.12-rc1:
> > 
> > drivers/net/phy/phy_device.c:293:12: warning: ‘mdio_bus_phy_resume’ defined but not used [-Wunused-function]
> > drivers/net/phy/phy_device.c:273:12: warning: ‘mdio_bus_phy_suspend’ defined but not used [-Wunused-function]
> > 
> > The problem is that these functions are only used by SIMPLE_DEV_PM_OPS(),
> > which creates a dev_pm_ops structure only in CONFIG_PM_SLEEP=y kernels.
> > Therefore, the mdio_bus_phy_suspend() and mdio_bus_phy_suspend() functions
> > will be used only in CONFIG_PM_SLEEP=y kernels.  This commit therefore
> > wraps them in #ifdef CONFIG_PM_SLEEP.
> 
> Arnd submitted a patch that Jakub has applied which fix these warnings
> in a slightly different way. Please see
> 20210225145748.404410-1-arnd@...nel.org

Works for me!  When will this be hitting mainline?

Not a huge deal given that I can suppress the resulting rcutorture
failures by keeping a copy of either patch in -rcu, but I might not
be the only one hitting this.

							Thanx, Paul