NFSv4: Convert nfs_lock_and_join_requests() to use nfs_page_find_head_request()

Hide the locking from nfs_lock_and_join_requests() so that we can
separate out the requirements for swapcache pages.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
This commit is contained in:
Trond Myklebust 2017-08-01 12:06:30 -04:00
commit bd37d6fce1