Module Name: src
Committed By: riastradh
Date: Wed Feb 17 00:43:43 UTC 2016
Modified Files:
src/sys/kern: kern_rndq.c
src/sys/sys: rndsource.h
Log Message:
Add rnd_add_data_sync for synchronous on-demand rndsource callbacks.
Avoids lock recursion in rndsinks:
rndsink user holds lock
calls rndsink_request
calls rnd_getmore
calls an rndsource callback
calls rnd_add_data
calls rnd_process_events
calls rndsinks_distribute
calls rndsink callback
acquires rndsink user lock.
This can happen only before the rnd_process_events softint is
established, but that's enough to cause a problem and is the main
reason why all our HWRNG drivers are so byzantine (soon to be
fixed!).
ok tls
To generate a diff of this commit:
cvs rdiff -u -r1.75 -r1.76 src/sys/kern/kern_rndq.c
cvs rdiff -u -r1.4 -r1.5 src/sys/sys/rndsource.h
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
