tree be15cad31bc5701570a571b3be04e299bb4ac547
parent a7efdf6bec34f1a693a926ebd08de6ba6e700dff
author chai wen <chaiw.fnst@cn.fujitsu.com> 1381760553 +0800
committer Gleb Natapov <gleb@redhat.com> 1381833817 +0300

KVM: Drop FOLL_GET in GUP when doing async page fault

Page pinning is not mandatory in kvm async page fault processing since
after async page fault event is delivered to a guest it accesses page once
again and does its own GUP.  Drop the FOLL_GET flag in GUP in async_pf
code, and do some simplifying in check/clear processing.

Suggested-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Gu zheng <guz.fnst@cn.fujitsu.com>
Signed-off-by: chai wen <chaiw.fnst@cn.fujitsu.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>