tree 09705ec6df92e7bbcdb06c52144f794ca94dfd68
parent b9345f483dc30f2e9d44786ee1a7e5700bb2341b
author John Eikenberry <jae@zhar.net> 1536959432 -0700
committer John Eikenberry <jae@zhar.net> 1537209875 -0700

fix race condition in fileget/fileput

This fixes the concurrent access/locking race in both fileget and
fileput when accessing the saved readerAt/writerAt. It eliminates the
dedicated functions and moves the access/locking inline where they were
called to make it clearer.

Thanks to Marshall Brekka (@marshallbrekka) for the original bug report
and outline for the fix.