tree 77016dd5476f6ba72605ac0cdcbccec3ce794057
parent eaf965270ffff3086ef929e660ace45e862cfd2d
author Steven Whitehouse <swhiteho@redhat.com> 1188219245 +0100
committer Steven Whitehouse <swhiteho@redhat.com> 1192002960 +0100

[GFS2] Move pin/unpin into lops.c, clean up locking

gfs2_pin and gfs2_unpin are only used in lops.c, despite being
defined in meta_io.c, so this patch moves them into lops.c and
makes them static. At the same time, its possible to clean up
the locking in the buf and databuf _lo_add() functions so that
we only need to grab the spinlock once. Also we have to move
lock_buffer() around the _lo_add() functions since we can't
do that in gfs2_pin() any more since we hold the spinlock
for the duration of that function.

As a result, the code shrinks by 12 lines and we do far fewer
operations when adding buffers to the log. It also makes the
code somewhat easier to read & understand.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>