linux-kernel - Re: [RESEND v4 5/7] mm, slab_common: Make kmalloc_caches[] start at size KMALLOC_MIN

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Date:   Mon, 16 Sep 2019 23:14:46 +0800
From:   Pengfei Li <lpf.vector@...il.com>
To:     kbuild test robot <lkp@...el.com>
Cc:     kbuild-all@...org, Andrew Morton <akpm@...ux-foundation.org>,
        Vlastimil Babka <vbabka@...e.cz>,
        Christopher Lameter <cl@...ux.com>, penberg@...nel.org,
        David Rientjes <rientjes@...gle.com>, iamjoonsoo.kim@....com,
        linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        Roman Gushchin <guro@...com>
Subject: Re: [RESEND v4 5/7] mm, slab_common: Make kmalloc_caches[] start at
 size KMALLOC_MIN_SIZE

On Mon, Sep 16, 2019 at 9:46 AM kbuild test robot <lkp@...el.com> wrote:
>
> Hi Pengfei,
>
> Thank you for the patch! Yet something to improve:
>
> [auto build test ERROR on linus/master]
> [cannot apply to v5.3 next-20190904]
> [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/Pengfei-Li/mm-slab-Make-kmalloc_info-contain-all-types-of-names/20190916-065820
> config: parisc-allmodconfig (attached as .config)
> compiler: hppa-linux-gcc (GCC) 7.4.0
> 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=7.4.0 make.cross ARCH=parisc
>
> If you fix the issue, kindly add following tag
> Reported-by: kbuild test robot <lkp@...el.com>
>
> All errors (new ones prefixed by >>):
>
> >> mm/slab_common.c:1144:34: error: 'KMALLOC_INFO_START_IDX' undeclared here (not in a function); did you mean 'VMALLOC_START'?
>     kmalloc_info = &all_kmalloc_info[KMALLOC_INFO_START_IDX];
>                                      ^~~~~~~~~~~~~~~~~~~~~~
>                                      VMALLOC_START
>
> vim +1144 mm/slab_common.c
>
>   1142
>   1143  const struct kmalloc_info_struct * const __initconst
> > 1144  kmalloc_info = &all_kmalloc_info[KMALLOC_INFO_START_IDX];
>   1145
>

Thanks.

This error is caused by I was mistakenly placed KMALLOC_INFO_SHIFT_LOW
and KMALLOC_INFO_START_IDX in the wrong place. (ARCH=sh is the same)

I will fix it in v5.

> ---
> 0-DAY kernel test infrastructure                Open Source Technology Center
> https://lists.01.org/pipermail/kbuild-all                   Intel Corporation