linux-kernel - Re: [PATCH] hugetlb:Make the function vma

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Message-ID: <558CD28C.5090201@oracle.com>
Date:	Thu, 25 Jun 2015 21:18:20 -0700
From:	Mike Kravetz <mike.kravetz@...cle.com>
To:	Nicholas Krause <xerofoify@...il.com>, akpm@...ux-foundation.org
CC:	n-horiguchi@...jp.nec.com, rientjes@...gle.com, dave@...olabs.net,
	lcapitulino@...hat.com, linux-mm@...ck.or,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] hugetlb:Make the function vma_shareable bool

On 06/25/2015 06:19 PM, Nicholas Krause wrote:
> This makes the function vma_shareable bool now due to this
> particular function only ever returning either one or zero
> as its return value.
>
> Signed-off-by: Nicholas Krause <xerofoify@...il.com>
> ---
>   mm/hugetlb.c | 6 +++---
>   1 file changed, 3 insertions(+), 3 deletions(-)
>
> diff --git a/mm/hugetlb.c b/mm/hugetlb.c
> index 75c0eef..c1be0d1 100644
> --- a/mm/hugetlb.c
> +++ b/mm/hugetlb.c
> @@ -3789,7 +3789,7 @@ static unsigned long page_table_shareable(struct vm_area_struct *svma,
>   	return saddr;
>   }
>
> -static int vma_shareable(struct vm_area_struct *vma, unsigned long addr)
> +static bool vma_shareable(struct vm_area_struct *vma, unsigned long addr)
>   {
>   	unsigned long base = addr & PUD_MASK;
>   	unsigned long end = base + PUD_SIZE;
> @@ -3799,8 +3799,8 @@ static int vma_shareable(struct vm_area_struct *vma, unsigned long addr)
>   	 */
>   	if (vma->vm_flags & VM_MAYSHARE &&
>   	    vma->vm_start <= base && end <= vma->vm_end)
> -		return 1;
> -	return 0;
> +		return true;
> +	return false;
>   }
>
>   /*
>

I was looking at the page table sharing code just last week.

Acked-by: Mike Kravetz <mike.kravetz@...cle.com>
-- 
Mike Kravetz
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