linux-kernel - Re: [PATCH -next v2] s390/ism: Remove PM support

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Message-Id: <20200327125840.GA4109@osiris>
Date:   Fri, 27 Mar 2020 13:58:40 +0100
From:   Heiko Carstens <heiko.carstens@...ibm.com>
To:     Nathan Chancellor <natechancellor@...il.com>
Cc:     Vasily Gorbik <gor@...ux.ibm.com>,
        Christian Borntraeger <borntraeger@...ibm.com>,
        Julian Wiedmann <jwi@...ux.ibm.com>,
        Ursula Braun <ubraun@...ux.ibm.com>,
        linux-s390@...r.kernel.org, linux-kernel@...r.kernel.org,
        clang-built-linux@...glegroups.com
Subject: Re: [PATCH -next v2] s390/ism: Remove PM support

On Thu, Mar 26, 2020 at 12:07:44PM -0700, Nathan Chancellor wrote:
> Clang warns:
> 
> drivers/s390/net/ism_drv.c:570:12: warning: unused function
> 'ism_suspend' [-Wunused-function]
> static int ism_suspend(struct device *dev)
>            ^
> drivers/s390/net/ism_drv.c:578:12: warning: unused function 'ism_resume'
> [-Wunused-function]
> static int ism_resume(struct device *dev)
>            ^
> 2 warnings generated.
> 
> When CONFIG_PM is unset, SIMPLE_DEV_PM_OPS does not use the suspend or
> resume functions. Power management was recently ripped out of s390 so
> CONFIG_PM will never be set and these functions will always be unused.
> 
> Remove them so that there is no more warning.
> 
> Link: https://github.com/ClangBuiltLinux/linux/issues/950
> Fixes: 394216275c7d ("s390: remove broken hibernate / power management support")
> Signed-off-by: Nathan Chancellor <natechancellor@...il.com>

Thank you, however there was already an identical patch from Ursula
which was missing on our branch. It's now there:

https://git.kernel.org/pub/scm/linux/kernel/git/s390/linux.git/commit/?h=features&id=194f75706b86847d1b4237958f7d6bd7ea7baf42