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Fri, 22 Jan 2021 03:55:27 -0500 X-MC-Unique: _U7CnJoKPbqkfFoUJBzZvg-1 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 735E610054FF; Fri, 22 Jan 2021 08:55:26 +0000 (UTC) Received: from [10.36.114.142] (ovpn-114-142.ams2.redhat.com [10.36.114.142]) by smtp.corp.redhat.com (Postfix) with ESMTP id 6A577709AE; Fri, 22 Jan 2021 08:55:25 +0000 (UTC) Subject: Re: [PATCH] mm: fix prototype warning from kernel test robot To: Baoquan He Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, akpm@linux-foundation.org, rppt@kernel.org References: <20210122070359.24010-1-bhe@redhat.com> <3fd62f11-bf44-3ede-aed1-10d9d4849f00@redhat.com> <20210122084659.GA29905@MiWiFi-R3L-srv> From: David Hildenbrand Organization: Red Hat GmbH Message-ID: <91244046-f5a0-8e67-4c92-fe9de118e472@redhat.com> Date: Fri, 22 Jan 2021 09:55:24 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.5.0 MIME-Version: 1.0 In-Reply-To: <20210122084659.GA29905@MiWiFi-R3L-srv> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On 22.01.21 09:46, Baoquan He wrote: > On 01/22/21 at 09:40am, David Hildenbrand wrote: >> On 22.01.21 08:03, Baoquan He wrote: >>> Kernel test robot calling make with 'W=1' triggering warning like below >>> below for memmap_init_zone() function. >>> >>> mm/page_alloc.c:6259:23: warning: no previous prototype for 'memmap_init_zone' [-Wmissing-prototypes] >>> 6259 | void __meminit __weak memmap_init_zone(unsigned long size, int nid, >>> | ^~~~~~~~~~~~~~~~ >>> >>> Fix it by adding the function declaration in include/linux/mm.h. >>> Since memmap_init_zone() has a generic version with '__weak', >>> the declaratoin in ia64 header file can be simply removed. >>> >>> Signed-off-by: Baoquan He >>> Reported-by: kernel test robot >>> --- >>> arch/ia64/include/asm/pgtable.h | 5 ----- >>> include/linux/mm.h | 1 + >>> 2 files changed, 1 insertion(+), 5 deletions(-) >>> >>> diff --git a/arch/ia64/include/asm/pgtable.h b/arch/ia64/include/asm/pgtable.h >>> index 2c81394a2430..9b4efe89e62d 100644 >>> --- a/arch/ia64/include/asm/pgtable.h >>> +++ b/arch/ia64/include/asm/pgtable.h >>> @@ -517,11 +517,6 @@ extern struct page *zero_page_memmap_ptr; >>> __changed; \ >>> }) >>> #endif >>> - >>> -# ifdef CONFIG_VIRTUAL_MEM_MAP >>> - /* arch mem_map init routine is needed due to holes in a virtual mem_map */ >>> - extern void memmap_init_zone(struct zone *zone); >>> -# endif /* CONFIG_VIRTUAL_MEM_MAP */ >>> # endif /* !__ASSEMBLY__ */ >>> >>> /* >>> diff --git a/include/linux/mm.h b/include/linux/mm.h >>> index 56bb239f9150..073049bd0b29 100644 >>> --- a/include/linux/mm.h >>> +++ b/include/linux/mm.h >>> @@ -2401,6 +2401,7 @@ extern void set_dma_reserve(unsigned long new_dma_reserve); >>> extern void memmap_init_range(unsigned long, int, unsigned long, >>> unsigned long, unsigned long, enum meminit_context, >>> struct vmem_altmap *, int migratetype); >>> +extern void memmap_init_zone(struct zone *zone); >>> extern void setup_per_zone_wmarks(void); >>> extern int __meminit init_per_zone_wmark_min(void); >>> extern void mem_init(void); >>> >> >> This patch is on top of your other series, no? >> >> In -next, we have >> >> extern void memmap_init_zone(unsigned long, int, unsigned long, ... >> >> In that file, so something is wrong. > > Right, this one is based on the memmap_init_xx clean up patchset. I > mentioned this the the sub-thread of kernel test robot reporting issues. > I think it would make things easier to move that fix to the front and resend the whole (5 patches) series. -- Thanks, David / dhildenb