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由 Peter Zijlstra 提交于
Change the get_user_pages() call with fast_gup() which doesn't require holding the mmap_sem thereby removing the mmap_sem from all fast paths. Signed-off-by: NPeter Zijlstra <a.p.zijlstra@chello.nl> Acked-by: NNick Piggin <nickpiggin@yahoo.com.au> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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