[GFS2] Remove useless i_cache from inodes

The i_cache was designed to keep references to the indirect blocks
used during block mapping so that they didn't have to be looked
up continually. The idea failed because there are too many places
where the i_cache needs to be freed, and this has in the past been
the cause of many bugs.

In addition there was no performance benefit being gained since the
disk blocks in question were cached anyway. So this patch removes
it in order to simplify the code to prepare for other changes which
would otherwise have had to add further support for this feature.

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

1 files changed, 0 insertions, 2 deletions

diff --git a/fs/gfs2/incore.h b/fs/gfs2/incore.h
index 55c72f01cf31..5662ff9f86e1 100644
--- a/fs/gfs2/incore.h
+++ b/fs/gfs2/incore.h
@@ -275,8 +275,6 @@ struct gfs2_inode {
 	spinlock_t i_spin;
 	struct rw_semaphore i_rw_mutex;
 	unsigned long i_last_pfault;
-
-	struct buffer_head *i_cache[GFS2_MAX_META_HEIGHT];
 };
 
 /*