From 835bb231590795c0edb87612f4a2ccfa72668a4a Mon Sep 17 00:00:00 2001
From: Christoph Hellwig <hch@lst.de>
Date: Fri, 3 Nov 2017 10:34:40 -0700
Subject: [PATCH 51/77] xfs: treat idx as a cursor in
 xfs_bmap_add_extent_hole_real
Git-commit: 1d2e0089e16642928c76f032c1dbd0eb6da22935
Patch-mainline: v4.15-rc1
References: bsc#1095344

Stop poking before and after the index and just increment or decrement
it while doing our operations on it to prepare for a new extent list
implementation.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Acked-by: Nikolay Borisov <nborisov@suse.com>
---
 fs/xfs/libxfs/xfs_bmap.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/fs/xfs/libxfs/xfs_bmap.c b/fs/xfs/libxfs/xfs_bmap.c
index c424fe85c12b..4232f0e475f4 100644
--- a/fs/xfs/libxfs/xfs_bmap.c
+++ b/fs/xfs/libxfs/xfs_bmap.c
@@ -2758,11 +2758,11 @@ xfs_bmap_add_extent_hole_real(
 		 * left and on the right.
 		 * Merge all three into a single extent record.
 		 */
-		--*idx;
 		left.br_blockcount += new->br_blockcount + right.br_blockcount;
-		xfs_iext_update_extent(ip, state, *idx, &left);
 
-		xfs_iext_remove(ip, *idx + 1, 1, state);
+		xfs_iext_remove(ip, *idx, 1, state);
+		--*idx;
+		xfs_iext_update_extent(ip, state, *idx, &left);
 
 		XFS_IFORK_NEXT_SET(ip, whichfork,
 			XFS_IFORK_NEXTENTS(ip, whichfork) - 1);
@@ -2794,10 +2794,10 @@ xfs_bmap_add_extent_hole_real(
 		 * on the left.
 		 * Merge the new allocation with the left neighbor.
 		 */
-		--*idx;
 		old = left;
-
 		left.br_blockcount += new->br_blockcount;
+
+		--*idx;
 		xfs_iext_update_extent(ip, state, *idx, &left);
 
 		if (cur == NULL) {
-- 
2.7.4