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TAKE 985583 - implement generic xfs_btree_lshift

To: sgi.bugs.xfs@xxxxxxxxxxxx, xfs@xxxxxxxxxxx
Subject: TAKE 985583 - implement generic xfs_btree_lshift
From: lachlan@xxxxxxx (Lachlan McIlroy)
Date: Wed, 24 Sep 2008 18:31:56 +1000 (EST)
implement generic xfs_btree_lshift

Make the btree left shift code generic.  Based on a patch from David Chinner
with lots of changes to follow the original btree implementations more
closely.  While this loses some of the generic helper routines for
inserting/moving/removing records it also solves some of the one off
bugs in the original code and makes it easier to verify.

Signed-off-by: Christoph Hellwig <hch@xxxxxx>

Date:  Wed Sep 24 18:31:09 AEST 2008
Workarea:  redback.melbourne.sgi.com:/home/lachlan/isms/2.6.x-btree
Inspected by:  
dgc
billodo
lachlan
Author:  lachlan

The following file(s) were checked into:
  longdrop.melbourne.sgi.com:/isms/linux/2.6.x-xfs-melb


Modid:  xfs-linux-melb:xfs-kern:32197a
fs/xfs/xfs_ialloc_btree.c - 1.99 - changed
http://oss.sgi.com/cgi-bin/cvsweb.cgi/xfs-linux/xfs_ialloc_btree.c.diff?r1=text&tr1=1.99&r2=text&tr2=1.98&f=h
fs/xfs/xfs_bmap_btree.c - 1.188 - changed
http://oss.sgi.com/cgi-bin/cvsweb.cgi/xfs-linux/xfs_bmap_btree.c.diff?r1=text&tr1=1.188&r2=text&tr2=1.187&f=h
fs/xfs/xfs_btree.c - 1.133 - changed
http://oss.sgi.com/cgi-bin/cvsweb.cgi/xfs-linux/xfs_btree.c.diff?r1=text&tr1=1.133&r2=text&tr2=1.132&f=h
fs/xfs/xfs_btree.h - 1.86 - changed
http://oss.sgi.com/cgi-bin/cvsweb.cgi/xfs-linux/xfs_btree.h.diff?r1=text&tr1=1.86&r2=text&tr2=1.85&f=h
fs/xfs/xfs_alloc_btree.c - 1.103 - changed
http://oss.sgi.com/cgi-bin/cvsweb.cgi/xfs-linux/xfs_alloc_btree.c.diff?r1=text&tr1=1.103&r2=text&tr2=1.102&f=h
        - implement generic xfs_btree_lshift



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