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rnd(9): Document the serial use of rndsource callbacks. 

This simplifies the rndsource API -- no need to lock, unless you're
also coordinating with other driver logic like concurrent
opencrypto(4) requests that share device requests.
This commit is contained in:
riastradh 2022-03-19 11:54:53 +00:00
parent 574989065b
commit 54916e3adb
1 changed files with 7 additions and 1 deletions
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8
share/man/man9/rnd.9
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@ -1,4 +1,4 @@
.\" $NetBSD: rnd.9,v 1.29 2020/05/04 15:13:45 wiz Exp $
.\" $NetBSD: rnd.9,v 1.30 2022/03/19 11:54:53 riastradh Exp $
.\"
.\" Copyright (c) 1997 The NetBSD Foundation, Inc.
.\" All rights reserved.
@ -165,6 +165,12 @@ not
or
.Fn rnd_add_uint32 .
.El
.Pp
.Nm
issues calls to each source's
.Fa callback
in serial \(em it never issues two calls to the same source's callback
at the same time in two differen threads or on two different CPUs.
.It Fn rnd_attach_source "rnd_source" "devname" "type" "flags"
Makes
.Fa rnd_source