btrfs: use KMEM_CACHE() to create btrfs_trans_handle cache

Use the KMEM_CACHE() macro instead of kmem_cache_create() to simplify
the creation of SLAB caches when the default values are used.

Signed-off-by: Kunwu Chan <chentao@kylinos.cn>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

Author: KunWuChan

fs/btrfs/transaction.c

@@ -2671,9 +2671,8 @@ void __cold __btrfs_abort_transaction(struct btrfs_trans_handle *trans,
 
 int __init btrfs_transaction_init(void)
 {
-	btrfs_trans_handle_cachep = kmem_cache_create("btrfs_trans_handle",
-			sizeof(struct btrfs_trans_handle), 0,
-			SLAB_TEMPORARY | SLAB_MEM_SPREAD, NULL);
+	btrfs_trans_handle_cachep = KMEM_CACHE(btrfs_trans_handle,
+					       SLAB_TEMPORARY | SLAB_MEM_SPREAD);
 	if (!btrfs_trans_handle_cachep)
 		return -ENOMEM;
 	return 0;