This reverts
sys/dev/rnd_private.h -> r1.1
sys/kern/init_main.c -> r1.450
sys/kern/kern_rndq.c -> r1.14
sys/kern/kern_rndsink.c -> r1.2
Parts of these changes will be added back, and the rndsource
callbacks will be fixed to avoid the lock recursion bug that
motivated the stop-gaps in the first place.
ok tls
hardware RNGs using the polling mode of operation:
1) Initialize the rng subsystem soft interrupts as early in kernel startup
as seems safe (we have no MI guarantee that softints are working at all
until configure2() returns, AFAICT).
This should have the rnd subsystem able to process events via softint
before the network subsystem (a notorious early user of entropy) starts.
2) Remove the shortcut calls to rnd_process_events() from
rnd_schedule_process(), with the result that until the softint is installed
rnd_process_events() is a NOP.
3) Directly call rnd_process_events() in rnd_extract_data(),
rnd_maybe_extract(), and rnd_init_softint(). This should suck up any
samples actually collected as early as possible.
