linux-kernel - Re: [PATCH v0.8 3/6] sched/umcg: implement UMCG syscalls

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Date:   Sun, 21 Nov 2021 13:08:44 -0800
From:   Peter Oskolkov <posk@...k.io>
To:     kernel test robot <lkp@...el.com>
Cc:     Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Andy Lutomirski <luto@...nel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-api@...r.kernel.org, kbuild-all@...ts.01.org,
        Linux Memory Management List <linux-mm@...ck.org>,
        Paul Turner <pjt@...gle.com>
Subject: Re: [PATCH v0.8 3/6] sched/umcg: implement UMCG syscalls

On Mon, Nov 15, 2021 at 12:12 PM kernel test robot <lkp@...el.com> wrote:
>
> Hi Peter,
>
> Thank you for the patch! Yet something to improve:
>
> [auto build test ERROR on 8ea9183db4ad8afbcb7089a77c23eaf965b0cacd]
>
> url:    https://github.com/0day-ci/linux/commits/Peter-Oskolkov/sched-mm-x86-uaccess-implement-User-Managed-Concurrency-Groups/20211105-035945
> base:   8ea9183db4ad8afbcb7089a77c23eaf965b0cacd
> config: i386-allyesconfig (attached as .config)
> compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
> reproduce (this is a W=1 build):
>         # https://github.com/0day-ci/linux/commit/93e6110356346b226e3a41044aafe3d3b0906d10
>         git remote add linux-review https://github.com/0day-ci/linux
>         git fetch --no-tags linux-review Peter-Oskolkov/sched-mm-x86-uaccess-implement-User-Managed-Concurrency-Groups/20211105-035945
>         git checkout 93e6110356346b226e3a41044aafe3d3b0906d10
>         # save the attached .config to linux build tree
>         mkdir build_dir
>         make W=1 O=build_dir ARCH=i386 SHELL=/bin/bash
>
> If you fix the issue, kindly add following tag as appropriate
> Reported-by: kernel test robot <lkp@...el.com>
>
> All errors (new ones prefixed by >>):

I cannot reproduce this. Both in my tree on top of tip, and the one
referenced above, I can compile i386 ok:

$ make ARCH=i386 allyesconfig
$ make ARCH=i386 -j16

succeeds.

$ gcc --version
gcc (Ubuntu 9.3.0-17ubuntu1~20.04) 9.3.0

>
>    In file included from <command-line>:32:
> >> ./usr/include/linux/umcg.h:80:2: error: unknown type name 'u64'
>       80 |  u64 state_ts;  /* r/w */
>          |  ^~~
> >> ./usr/include/linux/umcg.h:91:2: error: unknown type name 'u32'
>       91 |  u32 next_tid;  /* r   */
>          |  ^~~
>    ./usr/include/linux/umcg.h:93:2: error: unknown type name 'u32'
>       93 |  u32 flags;   /* Reserved; must be zero. */
>          |  ^~~
>    ./usr/include/linux/umcg.h:101:2: error: unknown type name 'u64'
>      101 |  u64 idle_workers_ptr; /* r/w */
>          |  ^~~
>    ./usr/include/linux/umcg.h:107:2: error: unknown type name 'u64'
>      107 |  u64 idle_server_tid_ptr; /* r   */
>          |  ^~~
>
> ---
> 0-DAY CI Kernel Test Service, Intel Corporation
> https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org