[PATCH v3 1/6] btrfs: use an on-stack path in btrfs_insert_orphan_item()

[Jeff Layton <jlayton@kernel.org>]

btrfs_insert_orphan_item() allocated a btrfs_path with btrfs_alloc_path()
which returns -ENOMEM on failure. It is called from btrfs_orphan_add(),
so a path allocation failure there turns a recoverable error into a
transaction abort.

btrfs_path is only ~112 bytes, so allocate it on the stack instead.

Assisted-by: LLM
Suggested-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: Jeff Layton <jlayton@kernel.org>
---
 fs/btrfs/orphan.c | 11 +++++------
 1 file changed, 5 insertions(+), 6 deletions(-)

diff --git a/fs/btrfs/orphan.c b/fs/btrfs/orphan.c
index 9f3ad124104f..72e1adec39d8 100644
--- a/fs/btrfs/orphan.c
+++ b/fs/btrfs/orphan.c
@@ -9,18 +9,17 @@
 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
 			     struct btrfs_root *root, u64 offset)
 {
-	BTRFS_PATH_AUTO_FREE(path);
+	struct btrfs_path path = { 0 };
 	struct btrfs_key key;
+	int ret;
 
 	key.objectid = BTRFS_ORPHAN_OBJECTID;
 	key.type = BTRFS_ORPHAN_ITEM_KEY;
 	key.offset = offset;
 
-	path = btrfs_alloc_path();
-	if (!path)
-		return -ENOMEM;
-
-	return btrfs_insert_empty_item(trans, root, path, &key, 0);
+	ret = btrfs_insert_empty_item(trans, root, &path, &key, 0);
+	btrfs_release_path(&path);
+	return ret;
 }
 
 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,

-- 
2.55.0