Reverted to one set of signed lfsr_mid_rid/bid functions, and tried to
make their usage more consistent.
We have two ways to compare mdirs now, lfsr_mdir_cmp (compares block
addresses) and lfsr_mdir_bid (compares mids), and it's not very clear
when to use which one. lfsr_mdir_cmp is a bit more robust in weird mid
cases (mainly inlined mdirs when mroot mid=-1), so currently preferring
that.
Also did some bit twiddling to preserve mid=-1 => bid=-1 and rid=-1,
this save a bit of code:
code stack
before: 31056 2488
after: 30972 (-0.3%) 2496 (+0.3%)
Christopher Haster
f4af2b407e