From mboxrd@z Thu Jan  1 00:00:00 1970
From: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Subject: Re: [PATCH 4/6] xen-gntdev: Support mapping in HVM domains
Date: Mon, 14 Feb 2011 10:51:36 -0500
Message-ID: <20110214155136.GA11034@dumpdata.com>
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To: Daniel De Graaf <dgdegra@tycho.nsa.gov>
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> +static int unmap_grant_pages(struct grant_map *map, int offset, int pages);
> +
>  /* ------------------------------------------------------------------ */
>  
>  static void gntdev_print_maps(struct gntdev_priv *priv,
> @@ -179,11 +184,34 @@ static void gntdev_put_map(struct grant_map *map)
>  
>  	atomic_sub(map->count, &pages_mapped);
>  
> -	if (map->pages)
> +	if (map->pages) {
> +		if (!use_ptemod)
> +			unmap_grant_pages(map, 0, map->count);

In the past (before this patch) the unmap_grant_pages would be called
on the .ioctl, .release, and .close (on VMA). This adds it now also
on the mmu_notifier_ops paths. Why?