Revert "Btrfs: adjust len of writes if following a preallocated extent"

This is exposing an existing deadlock between fsync and AIO.  Until we
have the deadlock fixed, I'm pulling this one out.

This reverts commit a23eaa875f.

Signed-off-by: Chris Mason <clm@fb.com>
This commit is contained in:
Chris Mason 2016-12-08 17:55:03 -08:00
commit 7c4c71ac8a