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| author | Nikolay Borisov | 2018-08-15 17:26:53 +0200 |
|---|---|---|
| committer | David Sterba | 2018-12-17 14:51:30 +0100 |
| commit | 6c122e2a0c515cfb3f3a9cefb5dad4cb62109c78 (patch) | |
| tree | c8a617a7b9d95b6613d5a9eae578f68d69b03b67 /fs/btrfs/ctree.c | |
| parent | btrfs: Remove needless tree locking in iterate_inode_extrefs (diff) | |
| download | kernel-qcow2-linux-6c122e2a0c515cfb3f3a9cefb5dad4cb62109c78.tar.gz kernel-qcow2-linux-6c122e2a0c515cfb3f3a9cefb5dad4cb62109c78.tar.xz kernel-qcow2-linux-6c122e2a0c515cfb3f3a9cefb5dad4cb62109c78.zip | |
btrfs: Remove redundant extent_buffer_get in get_old_root
get_old_root used used only by btrfs_search_old_slot to initialise the
path structure. The old root is always a cloned buffer (either via alloc
dummy or via btrfs_clone_extent_buffer) and its reference count is 2: 1
from allocation, 1 from extent_buffer_get call in get_old_root.
This latter explicit ref count acquire operation is in fact unnecessary
since the semantic is such that the newly allocated buffer is handed
over to the btrfs_path for lifetime management. Considering this just
remove the extra extent_buffer_get in get_old_root.
Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/ctree.c')
| -rw-r--r-- | fs/btrfs/ctree.c | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c index 539901fb5165..0c5ece3fe741 100644 --- a/fs/btrfs/ctree.c +++ b/fs/btrfs/ctree.c @@ -1362,7 +1362,6 @@ get_old_root(struct btrfs_root *root, u64 time_seq) if (!eb) return NULL; - extent_buffer_get(eb); btrfs_tree_read_lock(eb); if (old_root) { btrfs_set_header_bytenr(eb, eb->start); |