In get_old_root we grab a lock on the extent buffer before we obtain a
reference on that buffer. That order is changed now.
Signed-off-by: Jan Schmidt <list.btrfs@xxxxxxxxxxxxx>
---
fs/btrfs/ctree.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c
index 7093ff5..bed06e8 100644
--- a/fs/btrfs/ctree.c
+++ b/fs/btrfs/ctree.c
@@ -1274,6 +1274,7 @@ get_old_root(struct btrfs_root *root, u64 time_seq)
free_extent_buffer(root->node);
if (!eb)
return NULL;
+ extent_buffer_get(eb);
btrfs_tree_read_lock(eb);
if (old_root) {
btrfs_set_header_bytenr(eb, eb->start);
@@ -1286,7 +1287,6 @@ get_old_root(struct btrfs_root *root, u64 time_seq)
__tree_mod_log_rewind(eb, time_seq, tm);
else
WARN_ON(btrfs_header_level(eb) != 0);
- extent_buffer_get(eb);
WARN_ON(btrfs_header_nritems(eb) > BTRFS_NODEPTRS_PER_BLOCK(root));
return eb;
--
1.7.1
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