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SubjectRe: [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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