linux-kernel - Re: [patch 16/17] add kmap_atomic

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Date:	Mon, 02 Apr 2007 00:22:29 -0700
From:	Jeremy Fitzhardinge <jeremy@...p.org>
To:	Andi Kleen <ak@...e.de>
CC:	Andrew Morton <akpm@...ux-foundation.org>,
	virtualization@...ts.osdl.org, lkml <linux-kernel@...r.kernel.org>,
	Zachary Amsden <zach@...are.com>
Subject: Re: [patch 16/17] add kmap_atomic_pte for mapping highpte pages

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
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