linux-kernel - Re: [PATCH] mm, slab: rename kmalloc-node cache to kmalloc-<size>

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Message-Id: <20170207133839.f6b1f1befe4468770991f5e0@linux-foundation.org>
Date:   Tue, 7 Feb 2017 13:38:39 -0800
From:   Andrew Morton <akpm@...ux-foundation.org>
To:     kbuild test robot <lkp@...el.com>
Cc:     Vlastimil Babka <vbabka@...e.cz>, kbuild-all@...org,
        linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        Joonsoo Kim <iamjoonsoo.kim@....com>,
        David Rientjes <rientjes@...gle.com>,
        Pekka Enberg <penberg@...nel.org>,
        Christoph Lameter <cl@...ux.com>
Subject: Re: [PATCH] mm, slab: rename kmalloc-node cache to kmalloc-<size>

On Wed, 8 Feb 2017 01:15:17 +0800 kbuild test robot <lkp@...el.com> wrote:

> Hi Vlastimil,
> 
> [auto build test WARNING on mmotm/master]
> [also build test WARNING on v4.10-rc7 next-20170207]
> [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/Vlastimil-Babka/mm-slab-rename-kmalloc-node-cache-to-kmalloc-size/20170204-021843
> base:   git://git.cmpxchg.org/linux-mmotm.git master
> config: arm-allyesconfig (attached as .config)
> compiler: arm-linux-gnueabi-gcc (Debian 6.1.1-9) 6.1.1 20160705
> reproduce:
>         wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross
>         chmod +x ~/bin/make.cross
>         # save the attached .config to linux build tree
>         make.cross ARCH=arm 
> 
> All warnings (new ones prefixed by >>):
> 
> >> WARNING: mm/built-in.o(.text+0x3b49c): Section mismatch in reference from the function get_kmalloc_cache_name() to the (unknown reference) .init.rodata:(unknown)
>    The function get_kmalloc_cache_name() references
>    the (unknown reference) __initconst (unknown).
>    This is often because get_kmalloc_cache_name lacks a __initconst
>    annotation or the annotation of (unknown) is wrong.

yup, thanks.

--- a/mm/slab_common.c~mm-slab-rename-kmalloc-node-cache-to-kmalloc-size-fix
+++ a/mm/slab_common.c
@@ -935,7 +935,7 @@ static struct {
 	{"kmalloc-67108864", 67108864}
 };
 
-const char *get_kmalloc_cache_name(int index)
+const char * __init get_kmalloc_cache_name(int index)
 {
 	return kmalloc_info[index].name;
 }
_