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btrfs: remove unused btrfs_root::defrag_trans_start

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Last touched in 2013 by commit de78b51a28 ("btrfs: remove cache only
arguments from defrag path") that was the only code that used the value.
Now it's only set but never used for anything, so we can remove it.

Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
David Sterba 2020-06-23 21:23:54 +02:00
parent bab16e21e8
commit a2570ef330
3 changed files with 2 additions and 8 deletions
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1
fs/btrfs/ctree.h
View File

@ -1075,7 +1075,6 @@ struct btrfs_root {
u64 highest_objectid;
u64 defrag_trans_start;
struct btrfs_key defrag_progress;
struct btrfs_key defrag_max;

4
fs/btrfs/disk-io.c
View File

@ -1141,10 +1141,6 @@ static void __setup_root(struct btrfs_root *root, struct btrfs_fs_info *fs_info,
memset(&root->root_key, 0, sizeof(root->root_key));
memset(&root->root_item, 0, sizeof(root->root_item));
memset(&root->defrag_progress, 0, sizeof(root->defrag_progress));
if (!dummy)
root->defrag_trans_start = fs_info->generation;
else
root->defrag_trans_start = 0;
root->root_key.objectid = objectid;
root->anon_dev = 0;

5
fs/btrfs/tree-defrag.c
View File

@ -133,10 +133,9 @@ int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
ret = 0;
}
done:
if (ret != -EAGAIN) {
if (ret != -EAGAIN)
memset(&root->defrag_progress, 0,
sizeof(root->defrag_progress));
root->defrag_trans_start = trans->transid;
}
return ret;
}