linux-kernel - Re: [PATCH] mm/memory_hotplug: move definitions of {set,clear}_zone

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Message-ID: <20191106152335.GC8138@dhcp22.suse.cz>
Date:   Wed, 6 Nov 2019 16:23:35 +0100
From:   Michal Hocko <mhocko@...nel.org>
To:     "Ben Dooks (Codethink)" <ben.dooks@...ethink.co.uk>
Cc:     linux-kernel@...ts.codethink.co.uk,
        Andrew Morton <akpm@...ux-foundation.org>,
        David Hildenbrand <david@...hat.com>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] mm/memory_hotplug: move definitions of
 {set,clear}_zone_contiguous

On Wed 06-11-19 12:39:11, Ben Dooks (Codethink) wrote:
> The {set,clear}_zone_contiguous are built whatever the
> configuraiton so move the definitions outside the current
> ifdef to avoid the following compiler warnings:
> 
> mm/page_alloc.c:1550:6: warning: no previous prototype for âset_zone_contiguousâ [-Wmissing-prototypes]
> mm/page_alloc.c:1571:6: warning: no previous prototype for âclear_zone_contiguousâ [-Wmissing-prototypes]
> 
> Signed-off-by: Ben Dooks (Codethink) <ben.dooks@...ethink.co.uk>

Acked-by: Michal Hocko <mhocko@...e.com>

> ---
> Cc: Andrew Morton <akpm@...ux-foundation.org>
> Cc: David Hildenbrand <david@...hat.com>
> Cc: linux-mm@...ck.org
> Cc: linux-kernel@...r.kernel.org
> ---
>  include/linux/memory_hotplug.h | 6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/include/linux/memory_hotplug.h b/include/linux/memory_hotplug.h
> index f46ea71b4ffd..6a6456040802 100644
> --- a/include/linux/memory_hotplug.h
> +++ b/include/linux/memory_hotplug.h
> @@ -229,9 +229,6 @@ void put_online_mems(void);
>  void mem_hotplug_begin(void);
>  void mem_hotplug_done(void);
>  
> -extern void set_zone_contiguous(struct zone *zone);
> -extern void clear_zone_contiguous(struct zone *zone);
> -
>  #else /* ! CONFIG_MEMORY_HOTPLUG */
>  #define pfn_to_online_page(pfn)			\
>  ({						\
> @@ -339,6 +336,9 @@ static inline int remove_memory(int nid, u64 start, u64 size)
>  static inline void __remove_memory(int nid, u64 start, u64 size) {}
>  #endif /* CONFIG_MEMORY_HOTREMOVE */
>  
> +extern void set_zone_contiguous(struct zone *zone);
> +extern void clear_zone_contiguous(struct zone *zone);
> +
>  extern void __ref free_area_init_core_hotplug(int nid);
>  extern int __add_memory(int nid, u64 start, u64 size);
>  extern int add_memory(int nid, u64 start, u64 size);
> -- 
> 2.24.0.rc1

-- 
Michal Hocko
SUSE Labs