netdev - Re: linux-next: build warning after merge of the net-next tree

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Date:   Wed, 17 Mar 2021 16:21:05 +0800
From:   Chen Yu <yu.c.chen@...el.com>
To:     Stephen Rothwell <sfr@...b.auug.org.au>
Cc:     David Miller <davem@...emloft.net>,
        Networking <netdev@...r.kernel.org>,
        Tony Nguyen <anthony.l.nguyen@...el.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux Next Mailing List <linux-next@...r.kernel.org>
Subject: Re: linux-next: build warning after merge of the net-next tree

Hi Stephen,
On Wed, Mar 17, 2021 at 06:56:05PM +1100, Stephen Rothwell wrote:
> Hi all,
> 
> After merging the net-next tree, today's linux-next build (sparc64
> defconfig) produced this warning:
> 
> drivers/net/ethernet/intel/e1000e/netdev.c:6926:12: warning: 'e1000e_pm_prepare' defined but not used [-Wunused-function]
>  static int e1000e_pm_prepare(struct device *dev)
>             ^~~~~~~~~~~~~~~~~
> 
> Introduced by commit
> 
>   ccf8b940e5fd ("e1000e: Leverage direct_complete to speed up s2ram")
> 
> CONFIG_PM_SLEEP is not set for this build.
>
Thanks for reporting. I think we need to add the '__maybe_unused' attribute as in case
CONFIG_PM_SLEEP is not set. Tony, it seems that the original v1 patch should eliminate
this warning, could you please help double check and apply that version?

thanks,
Chenyu
 
> -- 
> Cheers,
> Stephen Rothwell