From: Peter Zijlstra
Try a speculative fault before acquiring mmap_sem, if it returns with
VM_FAULT_RETRY continue with the mmap_sem acquisition and do the
traditional fault.
Signed-off-by: Peter Zijlstra (Intel)
[Clearing of FAULT_FLAG_ALLOW_RETRY
From: Peter Zijlstra
Try a speculative fault before acquiring mmap_sem, if it returns with
VM_FAULT_RETRY continue with the mmap_sem acquisition and do the
traditional fault.
Signed-off-by: Peter Zijlstra (Intel)
[Clearing of FAULT_FLAG_ALLOW_RETRY is now done in
handle_speculative_fault()]
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