btrfs: remove global rsv stealing logic for orphan cleanup

This is very old code before we were stealing from the global reserve
during evict.  We have proper ways to steal from the global reserve
while we're evicting, so rip out this code as it's no longer necessary.

Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/fs/btrfs/space-info.c b/fs/btrfs/space-info.c
index a546cd411de41e210940bf8f0e75938707189b39..d277c7111b95439db50d2fb9ed17e6977b7e4c5b 100644 (file)
--- a/fs/btrfs/space-info.c
+++ b/fs/btrfs/space-info.c
@@ -1606,16 +1606,9 @@ int btrfs_reserve_metadata_bytes(struct btrfs_root *root,
                                 enum btrfs_reserve_flush_enum flush)
 {
        struct btrfs_fs_info *fs_info = root->fs_info;
-       struct btrfs_block_rsv *global_rsv = &fs_info->global_block_rsv;
        int ret;
 
        ret = __reserve_bytes(fs_info, block_rsv->space_info, orig_bytes, flush);
-       if (ret == -ENOSPC &&
-           unlikely(root->orphan_cleanup_state == ORPHAN_CLEANUP_STARTED)) {
-               if (block_rsv != global_rsv &&
-                   !btrfs_block_rsv_use_bytes(global_rsv, orig_bytes))
-                       ret = 0;
-       }
        if (ret == -ENOSPC) {
                trace_btrfs_space_reservation(fs_info, "space_info:enospc",
                                              block_rsv->space_info->flags,