Provided by:
linux-doc-2.6.15_2.6.15-23.39_all 
NAME
journal_lock_updates - establish a transaction barrier.
SYNOPSIS
void journal_lock_updates (journal_t * journal);
ARGUMENTS
journal
Journal to establish a barrier on.
DESCRIPTION
This locks out any further updates from being started, and blocks until
all existing updates have completed, returning only once the journal is
in a quiescent state with no updates running.
The journal lock should not be held on entry.
AUTHORS
Roger Gammans <rgammans@computer-surgery.co.uk>, Stephen Tweedie
<sct@redhat.com>.