tree 2cd92ec3cfc66cdfd3cff1b4a46f1b5a4f4b8197
parent 62a8067a7f35dba2de501c9cb00e4cf36da90bc0
author Al Viro <viro@zeniv.linux.org.uk> 1396686428 -0400
committer Al Viro <viro@zeniv.linux.org.uk> 1402546731 -0400

->splice_write() via ->write_iter()

iter_file_splice_write() - a ->splice_write() instance that gathers the
pipe buffers, builds a bio_vec-based iov_iter covering those and feeds
it to ->write_iter().  A bunch of simple cases coverted to that...

[AV: fixed the braino spotted by Cyrill]

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>