btrfs_use_block_rsv   82 fs/btrfs/block-rsv.h struct btrfs_block_rsv *btrfs_use_block_rsv(struct btrfs_trans_handle *trans,
btrfs_use_block_rsv 4514 fs/btrfs/extent-tree.c 	block_rsv = btrfs_use_block_rsv(trans, root, blocksize);