linux-kernel - Re: [PATCH 02/18] mm, hugetlb: change variable name reservations to resv

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Date:	Tue, 30 Jul 2013 22:20:51 +0530
From:	"Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com>
To:	Joonsoo Kim <iamjoonsoo.kim@....com>,
	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Rik van Riel <riel@...hat.com>, Mel Gorman <mgorman@...e.de>,
	Michal Hocko <mhocko@...e.cz>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	Hugh Dickins <hughd@...gle.com>,
	Davidlohr Bueso <davidlohr.bueso@...com>,
	David Gibson <david@...son.dropbear.id.au>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org, Joonsoo Kim <js1304@...il.com>,
	Wanpeng Li <liwanp@...ux.vnet.ibm.com>,
	Naoya Horiguchi <n-horiguchi@...jp.nec.com>,
	Hillf Danton <dhillf@...il.com>,
	Joonsoo Kim <iamjoonsoo.kim@....com>
Subject: Re: [PATCH 02/18] mm, hugetlb: change variable name reservations to resv

Joonsoo Kim <iamjoonsoo.kim@....com> writes:

> 'reservations' is so long name as a variable and we use 'resv_map'
> to represent 'struct resv_map' in other place. To reduce confusion and
> unreadability, change it.
>
> Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@....com>

Reviewed-by: Aneesh Kumar <aneesh.kumar@...ux.vnet.ibm.com>

>
> diff --git a/mm/hugetlb.c b/mm/hugetlb.c
> index d971233..12b6581 100644
> --- a/mm/hugetlb.c
> +++ b/mm/hugetlb.c
> @@ -1095,9 +1095,9 @@ static long vma_needs_reservation(struct hstate *h,
>  	} else  {
>  		long err;
>  		pgoff_t idx = vma_hugecache_offset(h, vma, addr);
> -		struct resv_map *reservations = vma_resv_map(vma);
> +		struct resv_map *resv = vma_resv_map(vma);
>
> -		err = region_chg(&reservations->regions, idx, idx + 1);
> +		err = region_chg(&resv->regions, idx, idx + 1);
>  		if (err < 0)
>  			return err;
>  		return 0;
> @@ -1115,10 +1115,10 @@ static void vma_commit_reservation(struct hstate *h,
>
>  	} else if (is_vma_resv_set(vma, HPAGE_RESV_OWNER)) {
>  		pgoff_t idx = vma_hugecache_offset(h, vma, addr);
> -		struct resv_map *reservations = vma_resv_map(vma);
> +		struct resv_map *resv = vma_resv_map(vma);
>
>  		/* Mark this page used in the map. */
> -		region_add(&reservations->regions, idx, idx + 1);
> +		region_add(&resv->regions, idx, idx + 1);
>  	}
>  }
>
> @@ -2168,7 +2168,7 @@ out:
>
>  static void hugetlb_vm_op_open(struct vm_area_struct *vma)
>  {
> -	struct resv_map *reservations = vma_resv_map(vma);
> +	struct resv_map *resv = vma_resv_map(vma);
>
>  	/*
>  	 * This new VMA should share its siblings reservation map if present.
> @@ -2178,34 +2178,34 @@ static void hugetlb_vm_op_open(struct vm_area_struct *vma)
>  	 * after this open call completes.  It is therefore safe to take a
>  	 * new reference here without additional locking.
>  	 */
> -	if (reservations)
> -		kref_get(&reservations->refs);
> +	if (resv)
> +		kref_get(&resv->refs);
>  }
>
>  static void resv_map_put(struct vm_area_struct *vma)
>  {
> -	struct resv_map *reservations = vma_resv_map(vma);
> +	struct resv_map *resv = vma_resv_map(vma);
>
> -	if (!reservations)
> +	if (!resv)
>  		return;
> -	kref_put(&reservations->refs, resv_map_release);
> +	kref_put(&resv->refs, resv_map_release);
>  }
>
>  static void hugetlb_vm_op_close(struct vm_area_struct *vma)
>  {
>  	struct hstate *h = hstate_vma(vma);
> -	struct resv_map *reservations = vma_resv_map(vma);
> +	struct resv_map *resv = vma_resv_map(vma);
>  	struct hugepage_subpool *spool = subpool_vma(vma);
>  	unsigned long reserve;
>  	unsigned long start;
>  	unsigned long end;
>
> -	if (reservations) {
> +	if (resv) {
>  		start = vma_hugecache_offset(h, vma, vma->vm_start);
>  		end = vma_hugecache_offset(h, vma, vma->vm_end);
>
>  		reserve = (end - start) -
> -			region_count(&reservations->regions, start, end);
> +			region_count(&resv->regions, start, end);
>
>  		resv_map_put(vma);
>
> -- 
> 1.7.9.5

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