linux-kernel - Re: [PATCH v2] mm/sparse.c: mark populate_section_memmap as _

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Message-ID: <26d03485-054e-40cc-2a04-151f9d96fdae@redhat.com>
Date:   Wed, 30 Oct 2019 16:33:24 +0100
From:   David Hildenbrand <david@...hat.com>
To:     Ilya Leoshkevich <iii@...ux.ibm.com>,
        Andrew Morton <akpm@...ux-foundation.org>
Cc:     linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        linux-s390@...r.kernel.org,
        Heiko Carstens <heiko.carstens@...ibm.com>,
        Vasily Gorbik <gor@...ux.ibm.com>,
        Oscar Salvador <osalvador@...e.de>
Subject: Re: [PATCH v2] mm/sparse.c: mark populate_section_memmap as __meminit

On 30.10.19 16:16, Ilya Leoshkevich wrote:
> Building the kernel on s390 with -Og produces the following warning:
> 
> WARNING: vmlinux.o(.text+0x28dabe): Section mismatch in reference from the function populate_section_memmap() to the function .meminit.text:__populate_section_memmap()
> The function populate_section_memmap() references
> the function __meminit __populate_section_memmap().
> This is often because populate_section_memmap lacks a __meminit
> annotation or the annotation of __populate_section_memmap is wrong.
> 
> While -Og is not supported, in theory this might still happen with
> another compiler or on another architecture. So fix this by using the
> correct section annotations.
> 
> Signed-off-by: Ilya Leoshkevich <iii@...ux.ibm.com>
> ---
> 
> v1 -> v2: Do not touch mm/sparse.c version of __populate_section_memmap:
> its __init annotation is correct, since it is only called during init
> phase (by sparse_init_nid), and contains the call to another __init
> function. Spotted by kbuild test robot <lkp@...el.com> and Oscar
> Salvador <osalvador@...e.de>.
> 
> I was notified that v1 has already been included into
> http://ozlabs.org/~akpm/mmots/broken-out. Since this is not a git
> repository, I've decided to send a v2 instead of the fix. Please let me
> know if I should send a fix instead.

That's fine, Andrew will simply replace the patch.

Acked-by: David Hildenbrand <david@...hat.com>

-- 

Thanks,

David / dhildenb