CVSROOT:        /cvs
Module name:    src
Changes by:     d...@cvs.openbsd.org    2016/05/31 21:34:32

Modified files:
        sys/sys        : srp.h 
        sys/kern       : kern_srp.c 

Log message:
add support for using SRPs without the garbage collection machinery.

the gc machinery may sleep during srp_update, which makes it hard
to use from an interrupt context. srp_swap simply swaps the references
in an srp and relies ont he caller to schedule work in a process
context where it may sleep with srp_finalise until the reference
is no longer in use.

our network stack currently modifies routing tables in an interrupt
context, so this is built to be used to support rtable updates in
our current stack while supporting concurrent lookups.

ok jmatthew@ mpi@

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