linux-kernel - Re: [PATCH v3 10/21] nvmem: change the signature of nvmem

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Date:   Thu, 13 Sep 2018 09:46:33 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Bartosz Golaszewski <brgl@...ev.pl>
Cc:     kbuild-all@...org,
        Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
        "David S . Miller" <davem@...emloft.net>,
        Mauro Carvalho Chehab <mchehab+samsung@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Arnd Bergmann <arnd@...db.de>,
        Jonathan Corbet <corbet@....net>, Sekhar Nori <nsekhar@...com>,
        Kevin Hilman <khilman@...nel.org>,
        David Lechner <david@...hnology.com>,
        Boris Brezillon <boris.brezillon@...tlin.com>,
        Andrew Lunn <andrew@...n.ch>, Alban Bedel <albeu@...e.fr>,
        Maxime Ripard <maxime.ripard@...tlin.com>,
        Chen-Yu Tsai <wens@...e.org>, linux-doc@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        Bartosz Golaszewski <bgolaszewski@...libre.com>
Subject: Re: [PATCH v3 10/21] nvmem: change the signature of
 nvmem_unregister()

Hi Bartosz,

I love your patch! Yet something to improve:

[auto build test ERROR on linus/master]
[also build test ERROR on v4.19-rc3 next-20180912]
[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/Bartosz-Golaszewski/nvmem-rework-of-the-subsystem-for-non-DT-users/20180913-071053
config: powerpc-allnoconfig (attached as .config)
compiler: powerpc-linux-gnu-gcc (Debian 7.2.0-11) 7.2.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        GCC_VERSION=7.2.0 make.cross ARCH=powerpc 

All errors (new ones prefixed by >>):

   In file included from include/linux/rtc.h:18:0,
                    from arch/powerpc/kernel/time.c:52:
   include/linux/nvmem-provider.h: In function 'devm_nvmem_unregister':
>> include/linux/nvmem-provider.h:101:9: error: return makes integer from pointer without a cast [-Werror=int-conversion]
     return ERR_PTR(-ENOSYS);
            ^~~~~~~~~~~~~~~~
   cc1: all warnings being treated as errors

vim +101 include/linux/nvmem-provider.h

    97	
    98	static inline int
    99	devm_nvmem_unregister(struct device *dev, struct nvmem_device *nvmem)
   100	{
 > 101		return ERR_PTR(-ENOSYS);
   102	

---
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