kvm: switch get_user_page_nowait() to get_user_pages_unlocked()

... and fold into the sole caller, unifying async and non-async cases

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2017-11-19 17:47:33 -05:00
commit ce53053ce3