tree ed16368e498daaf4451241b5c734368a31986b1e
parent 0a61b222df75a6a69dc34816f7db2f61fee8c935
author Dominik Dingel <dingel@linux.vnet.ibm.com> 1395667678 +0100
committer Christian Borntraeger <borntraeger@de.ibm.com> 1398152187 +0200

KVM: s390/mm: new gmap_test_and_clear_dirty function

For live migration kvm needs to test and clear the dirty bit of guest pages.

That for is ptep_test_and_clear_user_dirty, to be sure we are not racing with
other code, we protect the pte. This needs to be done within
the architecture memory management code.

Signed-off-by: Dominik Dingel <dingel@linux.vnet.ibm.com>
Acked-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>