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| author | Nikolay Borisov <nborisov@suse.com> | 2018-08-15 18:26:53 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-09-09 19:03:10 +0200 |
| commit | e23efd6da3a660168a053122b6e26917231bfcdf (patch) | |
| tree | 3df35a3cd74592ef5a91853b1591f7ef1a1e1527 /fs | |
| parent | 72de52916de69cce0b3f85198e656252ce236a81 (diff) | |
btrfs: Remove redundant extent_buffer_get in get_old_root
[ Upstream commit 6c122e2a0c515cfb3f3a9cefb5dad4cb62109c78 ]
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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'fs')
| -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 f5a8c0d26cf3..492a781c27cd 100644 --- a/fs/btrfs/ctree.c +++ b/fs/btrfs/ctree.c @@ -1438,7 +1438,6 @@ 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); |