Symbol: ufs_freesp
usr/src/uts/common/fs/ufs/ufs_vnops.c
4351
error = ufs_freesp(vp, bfp, flag, cr);
usr/src/uts/common/sys/fs/ufs_inode.h
877
extern int ufs_freesp(struct vnode *, struct flock64 *, int, cred_t *);