[PATCH 1/8] btrfs: preparatory to make btrfs_rm_dev_replace_srcdev() seed aware

[Anand Jain]

There is no logical change in this patch, just a preparatory patch,
so that changes can be easily reasoned.

Signed-off-by: Anand Jain <anand.j...@oracle.com>
---
 fs/btrfs/volumes.c | 14 +++++++++-----
 1 file changed, 9 insertions(+), 5 deletions(-)

diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index 5f634b6..5fd0132 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -1960,19 +1960,23 @@ error_undo:
 void btrfs_rm_dev_replace_srcdev(struct btrfs_fs_info *fs_info,
                                 struct btrfs_device *srcdev)
 {
+       struct btrfs_fs_devices *fs_devices;
+
        WARN_ON(!mutex_is_locked(&fs_info->fs_devices->device_list_mutex));
 
+       fs_devices = fs_info->fs_devices;
+
        list_del_rcu(&srcdev->dev_list);
        list_del_rcu(&srcdev->dev_alloc_list);
-       fs_info->fs_devices->num_devices--;
+       fs_devices->num_devices--;
        if (srcdev->missing) {
-               fs_info->fs_devices->missing_devices--;
-               fs_info->fs_devices->rw_devices++;
+               fs_devices->missing_devices--;
+               fs_devices->rw_devices++;
        }
        if (srcdev->can_discard)
-               fs_info->fs_devices->num_can_discard--;
+               fs_devices->num_can_discard--;
        if (srcdev->bdev) {
-               fs_info->fs_devices->open_devices--;
+               fs_devices->open_devices--;
 
                /*
                 * zero out the old super if it is not writable
-- 
2.0.0.153.g79dcccc

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