Provided by:
linux-doc-2.6.15_2.6.15-23.39_all 
NAME
journal_get_write_access - notify intent to modify a buffer for
metadata (not data) update.
SYNOPSIS
int journal_get_write_access (handle_t * handle,
struct buffer_head * bh);
ARGUMENTS
handle transaction to add buffer modifications to
bh bh to be used for metadata writes
DESCRIPTION
Returns an error code or 0 on success.
In full data journalling mode the buffer may be of type BJ_AsyncData,
because we’re writeing a buffer which is also part of a shared mapping.
AUTHORS
Roger Gammans <rgammans@computer-surgery.co.uk>, Stephen Tweedie
<sct@redhat.com>.