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Date:   Sat, 23 Dec 2017 18:08:41 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Ulf Hansson <ulf.hansson@...aro.org>
Cc:     kbuild-all@...org, Kishon Vijay Abraham I <kishon@...com>,
        linux-kernel@...r.kernel.org,
        "Rafael J . Wysocki" <rjw@...ysocki.net>, linux-pm@...r.kernel.org,
        Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        linux-renesas-soc@...r.kernel.org,
        Ulf Hansson <ulf.hansson@...aro.org>
Subject: Re: [PATCH v2 2/3] phy: core: Drop unused runtime PM APIs

Hi Ulf,

I love your patch! Yet something to improve:

[auto build test ERROR on phy/next]
[also build test ERROR on v4.15-rc4 next-20171222]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Ulf-Hansson/phy-core-Re-work-runtime-PM-deployment-and-fix-an-issue/20171223-170432
base:   https://git.kernel.org/pub/scm/linux/kernel/git/kishon/linux-phy.git next
config: x86_64-acpi-redef (attached as .config)
compiler: gcc-7 (Debian 7.2.0-12) 7.2.1 20171025
reproduce:
        # save the attached .config to linux build tree
        make ARCH=x86_64 

All errors (new ones prefixed by >>):

   drivers//ata/libahci.c: In function 'ahci_rpm_get_port':
>> drivers//ata/libahci.c:239:9: error: implicit declaration of function 'pm_runtime_get_sync'; did you mean 'ktime_get_ns'? [-Werror=implicit-function-declaration]
     return pm_runtime_get_sync(ap->dev);
            ^~~~~~~~~~~~~~~~~~~
            ktime_get_ns
   drivers//ata/libahci.c: In function 'ahci_rpm_put_port':
>> drivers//ata/libahci.c:251:2: error: implicit declaration of function 'pm_runtime_put'; did you mean 'of_node_put'? [-Werror=implicit-function-declaration]
     pm_runtime_put(ap->dev);
     ^~~~~~~~~~~~~~
     of_node_put
   cc1: some warnings being treated as errors

vim +251 drivers//ata/libahci.c

365cfa1e Anton Vorontsov 2010-03-28  228  
bb03c640 Mika Westerberg 2016-02-18  229  /**
bb03c640 Mika Westerberg 2016-02-18  230   *	ahci_rpm_get_port - Make sure the port is powered on
bb03c640 Mika Westerberg 2016-02-18  231   *	@ap: Port to power on
bb03c640 Mika Westerberg 2016-02-18  232   *
bb03c640 Mika Westerberg 2016-02-18  233   *	Whenever there is need to access the AHCI host registers outside of
bb03c640 Mika Westerberg 2016-02-18  234   *	normal execution paths, call this function to make sure the host is
bb03c640 Mika Westerberg 2016-02-18  235   *	actually powered on.
bb03c640 Mika Westerberg 2016-02-18  236   */
bb03c640 Mika Westerberg 2016-02-18  237  static int ahci_rpm_get_port(struct ata_port *ap)
bb03c640 Mika Westerberg 2016-02-18  238  {
bb03c640 Mika Westerberg 2016-02-18 @239  	return pm_runtime_get_sync(ap->dev);
bb03c640 Mika Westerberg 2016-02-18  240  }
bb03c640 Mika Westerberg 2016-02-18  241  
bb03c640 Mika Westerberg 2016-02-18  242  /**
bb03c640 Mika Westerberg 2016-02-18  243   *	ahci_rpm_put_port - Undoes ahci_rpm_get_port()
bb03c640 Mika Westerberg 2016-02-18  244   *	@ap: Port to power down
bb03c640 Mika Westerberg 2016-02-18  245   *
bb03c640 Mika Westerberg 2016-02-18  246   *	Undoes ahci_rpm_get_port() and possibly powers down the AHCI host
bb03c640 Mika Westerberg 2016-02-18  247   *	if it has no more active users.
bb03c640 Mika Westerberg 2016-02-18  248   */
bb03c640 Mika Westerberg 2016-02-18  249  static void ahci_rpm_put_port(struct ata_port *ap)
bb03c640 Mika Westerberg 2016-02-18  250  {
bb03c640 Mika Westerberg 2016-02-18 @251  	pm_runtime_put(ap->dev);
bb03c640 Mika Westerberg 2016-02-18  252  }
bb03c640 Mika Westerberg 2016-02-18  253  

:::::: The code at line 251 was first introduced by commit
:::::: bb03c640697155639b2e15e2aaa4c10f60bf0d5e ahci: Add functions to manage runtime PM of AHCI ports

:::::: TO: Mika Westerberg <mika.westerberg@...ux.intel.com>
:::::: CC: Tejun Heo <tj@...nel.org>

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