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Date: Mon, 02 Apr 2007 00:22:29 -0700
From: Jeremy Fitzhardinge <jeremy@goop.org>
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To: Andi Kleen <ak@suse.de>
CC: Andrew Morton <akpm@linux-foundation.org>, virtualization@lists.osdl.org,
       lkml <linux-kernel@vger.kernel.org>, Zachary Amsden <zach@vmware.com>
Subject: Re: [patch 16/17] add kmap_atomic_pte for mapping highpte pages
References: <20070402055652.610711908@goop.org> <20070402055705.499213579@goop.org> <200704020918.20008.ak@suse.de>
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Andi Kleen wrote:
>> +}
>> +
>> +/* Flush all unused kmap mappings in order to remove stray
>> +   mappings. */
>> +void kmap_flush_unused(void)
>> +{
>> +	spin_lock(&kmap_lock);
>> +	flush_all_zero_pkmaps();
>> +	spin_unlock(&kmap_lock);
>>  }
>>     
>
> Who calls this now?

Nobody in kernel, or in this patchset.  The Xen code calls it to make
sure there are no stray RW mappings of a page it has freshly allocated
for use in a pagetable.

    J