tree da1face7b4d051f5a11b81dec03aa4f40e39d317
parent ef954844c7ace62f773f4f23e28d2d915adc419f
author Trond Myklebust <trond.myklebust@primarydata.com> 1499622327 -0400
committer Trond Myklebust <trond.myklebust@primarydata.com> 1502812486 -0400

NFS: Simplify page writeback

We don't expect the page header lock to ever be held across I/O, so
it should always be safe to wait for it, even if we're doing nonblocking
writebacks.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>