hash(9): introduce hashalloc()/hashfree() KPI

This is a more extendable version than traditional hashinit(9). It allows
different kinds of slot headers with optional locks.

Implement traditional h

hash(9): introduce hashalloc()/hashfree() KPI

This is a more extendable version than traditional hashinit(9). It allows
different kinds of slot headers with optional locks.

Implement traditional hashinit()/hashdestroy() on top of it.

Reviewed by: pouria, gallatin
Differential Revision: https://reviews.freebsd.org/D55904

show more ...