seqc_consistent
(!seqc_consistent(&(seqcount)->seqc, gen))
if (seqc_consistent(&cur->gen, gen))
if (seqc_consistent(fd_seqc(fdt, fd), seq))
if (seqc_consistent(fd_seqc(fdt, fd), seq))
if (seqc_consistent(&pfcu64->pfcu64_seqc, seqc))
return (!seqc_consistent(fd_seqc(fdp->fd_files, fd), seqc));
#define vn_seqc_consistent(vp, seq) seqc_consistent(&(vp)->v_seqc, seq)