linux-kernel - Re: [PATCH v2] gpu: drm: gma500: Change return type to vm_fault

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Date:   Sat, 26 May 2018 19:02:17 +0530
From:   Souptick Joarder <jrdr.linux@...il.com>
To:     kbuild test robot <lkp@...el.com>
Cc:     kbuild-all@...org, Patrik Jakobsson <patrik.r.jakobsson@...il.com>,
        airlied@...ux.ie, dri-devel@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org, Matthew Wilcox <willy@...radead.org>
Subject: Re: [PATCH v2] gpu: drm: gma500: Change return type to vm_fault_t

On Sat, May 26, 2018 at 8:11 AM, kbuild test robot <lkp@...el.com> wrote:
> Hi Souptick,
>
> Thank you for the patch! Perhaps something to improve:
>
> [auto build test WARNING on drm/drm-next]
> [also build test WARNING on v4.17-rc6]
> [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/Souptick-Joarder/gpu-drm-gma500-Change-return-type-to-vm_fault_t/20180526-084629
> base:   git://people.freedesktop.org/~airlied/linux.git drm-next
> config: x86_64-randconfig-x013-201820 (attached as .config)
> compiler: gcc-7 (Debian 7.3.0-16) 7.3.0
> reproduce:
>         # save the attached .config to linux build tree
>         make ARCH=x86_64
>
> Note: it may well be a FALSE warning. FWIW you are at least aware of it now.
> http://gcc.gnu.org/wiki/Better_Uninitialized_Warnings
>
> All warnings (new ones prefixed by >>):
>
>    drivers/gpu//drm/gma500/framebuffer.c: In function 'psbfb_vm_fault':
>>> drivers/gpu//drm/gma500/framebuffer.c:143:9: warning: 'ret' may be used uninitialized in this function [-Wmaybe-uninitialized]
>      return ret;
>             ^~~

Sorrry about it. Will fix and send v3.