linux-kernel - Re: [PATCH 3/7] mm/memblock: memblock_is

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Date:	Mon, 16 Nov 2015 13:41:50 +0100
From:	Michal Hocko <mhocko@...nel.org>
To:	Yaowei Bai <baiyaowei@...s.chinamobile.com>
Cc:	akpm@...ux-foundation.org, bhe@...hat.com,
	dan.j.williams@...el.com, dave.hansen@...ux.intel.com,
	dave@...olabs.net, dhowells@...hat.com, dingel@...ux.vnet.ibm.com,
	hannes@...xchg.org, hillf.zj@...baba-inc.com, holt@....com,
	iamjoonsoo.kim@....com, joe@...ches.com, kuleshovmail@...il.com,
	mgorman@...e.de, mike.kravetz@...cle.com,
	n-horiguchi@...jp.nec.com, penberg@...nel.org, rientjes@...gle.com,
	sasha.levin@...cle.com, tj@...nel.org, tony.luck@...el.com,
	vbabka@...e.cz, vdavydov@...allels.com, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/7] mm/memblock: memblock_is_memory/reserved can be
 boolean

On Mon 16-11-15 14:51:22, Yaowei Bai wrote:
> This patch makes memblock_is_memory/reserved return bool to improve
> readability due to this particular function only using either
> one or zero as its return value.
> 
> No functional change.
> 
> Signed-off-by: Yaowei Bai <baiyaowei@...s.chinamobile.com>

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

> ---
>  include/linux/memblock.h | 4 ++--
>  mm/memblock.c            | 4 ++--
>  2 files changed, 4 insertions(+), 4 deletions(-)
> 
> diff --git a/include/linux/memblock.h b/include/linux/memblock.h
> index 24daf8f..a25cce94 100644
> --- a/include/linux/memblock.h
> +++ b/include/linux/memblock.h
> @@ -318,9 +318,9 @@ phys_addr_t memblock_mem_size(unsigned long limit_pfn);
>  phys_addr_t memblock_start_of_DRAM(void);
>  phys_addr_t memblock_end_of_DRAM(void);
>  void memblock_enforce_memory_limit(phys_addr_t memory_limit);
> -int memblock_is_memory(phys_addr_t addr);
> +bool memblock_is_memory(phys_addr_t addr);
>  int memblock_is_region_memory(phys_addr_t base, phys_addr_t size);
> -int memblock_is_reserved(phys_addr_t addr);
> +bool memblock_is_reserved(phys_addr_t addr);
>  bool memblock_is_region_reserved(phys_addr_t base, phys_addr_t size);
>  
>  extern void __memblock_dump_all(void);
> diff --git a/mm/memblock.c b/mm/memblock.c
> index d300f13..1ab7b9e 100644
> --- a/mm/memblock.c
> +++ b/mm/memblock.c
> @@ -1509,12 +1509,12 @@ static int __init_memblock memblock_search(struct memblock_type *type, phys_addr
>  	return -1;
>  }
>  
> -int __init memblock_is_reserved(phys_addr_t addr)
> +bool __init memblock_is_reserved(phys_addr_t addr)
>  {
>  	return memblock_search(&memblock.reserved, addr) != -1;
>  }
>  
> -int __init_memblock memblock_is_memory(phys_addr_t addr)
> +bool __init_memblock memblock_is_memory(phys_addr_t addr)
>  {
>  	return memblock_search(&memblock.memory, addr) != -1;
>  }
> -- 
> 1.9.1
> 
> 

-- 
Michal Hocko
SUSE Labs
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