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Date: Mon, 20 Jun 2016 16:11:26 -0700
From: Andrew Morton <akpm@linux-foundation.org>
To: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: linux-mm@kvack.org, Paolo Bonzini <pbonzini@redhat.com>,
        Radim =?UTF-8?Q?Kr=C4=8Dm=C3=A1=C5=99?= <rkrcmar@redhat.com>,
        KVM <kvm@vger.kernel.org>, Cornelia Huck <cornelia.huck@de.ibm.com>,
        linux-s390 <linux-s390@vger.kernel.org>,
        David Hildenbrand <dahi@linux.vnet.ibm.com>,
        linux-kernel@vger.kernel.org, Vlastimil Babka <vbabka@suse.cz>,
        Joonsoo Kim <iamjoonsoo.kim@lge.com>
Subject: Re: [PATCH 1/1] mm/page_ref: introduce page_ref_inc_return
Message-Id: <20160620161126.082c51572524a39f599ecc52@linux-foundation.org>
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	<1466419093-114348-2-git-send-email-borntraeger@de.ibm.com>
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On Mon, 20 Jun 2016 12:38:13 +0200 Christian Borntraeger <borntraeger@de.ibm.com> wrote:

> From: David Hildenbrand <dahi@linux.vnet.ibm.com>
> 
> Let's introduce that helper.
> 
> ...
>
> +static inline int page_ref_inc_return(struct page *page)
> +{
> +	int ret = atomic_inc_return(&page->_refcount);
> +
> +	if (page_ref_tracepoint_active(__tracepoint_page_ref_mod_and_return))
> +		__page_ref_mod_and_return(page, 1, ret);
> +	return ret;
> +}

Acked-by: Andrew Morton <akpm@linux-foundation.org>