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Comment initialisation conditions for rnd better, and don't uselessly 

call rnd_init - instead assert that it has already been called
earlier.

change assert() -> KASSERT()
This commit is contained in:
dan 2002-10-08 12:12:56 +00:00
parent a30355b57a
commit 8c19166361
2 changed files with 17 additions and 15 deletions
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24
sys/dev/rnd.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: rnd.c,v 1.33 2002/10/08 09:59:27 dan Exp $ */
/* $NetBSD: rnd.c,v 1.34 2002/10/08 12:12:56 dan Exp $ */
/*-
* Copyright (c) 1997 The NetBSD Foundation, Inc.
@ -38,7 +38,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: rnd.c,v 1.33 2002/10/08 09:59:27 dan Exp $");
__KERNEL_RCSID(0, "$NetBSD: rnd.c,v 1.34 2002/10/08 12:12:56 dan Exp $");
#include <sys/param.h>
#include <sys/ioctl.h>
@ -280,27 +280,29 @@ rnd_estimate_entropy(rndsource_t *rs, u_int32_t t)
}
/*
* Attach the random device, and initialize the global random pool
* for our use.
* "Attach" the random device. This is an (almost) empty stub, since
* pseudo-devices don't get attached until after config, after the
* entropy sources will attach. We just use the timing of this event
* as another potential source of initial entropy.
*/
void
rndattach(int num)
{
u_int32_t c;
/*
* rnd_init() is actually called very early on in the boot
* process, pseudo's don't get attached until much later
* (after many of the sources have been attached).
* XXX Maybe this is left "in case", maybe it should be an assert?
*/
rnd_init();
/* Trap unwary players who don't call rnd_init() early */
KASSERT(rnd_ready);
/* mix in another counter */
c = rnd_counter();
rndpool_add_data(&rnd_pool, &c, sizeof(u_int32_t), 0);
}
/*
* initialize the global random pool for our use.
* rnd_init() must be called very early on in the boot process, so
* the pool is ready for other devices to attach as sources.
*/
void
rnd_init(void)
{

8
sys/dev/rndpool.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: rndpool.c,v 1.14 2001/11/15 09:48:03 lukem Exp $ */
/* $NetBSD: rndpool.c,v 1.15 2002/10/08 12:12:57 dan Exp $ */
/*-
* Copyright (c) 1997 The NetBSD Foundation, Inc.
@ -38,7 +38,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: rndpool.c,v 1.14 2001/11/15 09:48:03 lukem Exp $");
__KERNEL_RCSID(0, "$NetBSD: rndpool.c,v 1.15 2002/10/08 12:12:57 dan Exp $");
#include <sys/param.h>
#include <sys/systm.h>
@ -71,7 +71,7 @@ rndpool_init(rndpool_t *rp)
rp->stats.threshold = RND_ENTROPY_THRESHOLD;
rp->stats.maxentropy = RND_POOLBITS;
assert(RND_ENTROPY_THRESHOLD*2 <= 20); /* XXX sha knowledge */
KASSERT(RND_ENTROPY_THRESHOLD*2 <= 20); /* XXX sha knowledge */
}
u_int32_t
@ -241,7 +241,7 @@ rndpool_extract_data(rndpool_t *rp, void *p, u_int32_t len, u_int32_t mode)
else
good = (rp->stats.curentropy >= (8 * RND_ENTROPY_THRESHOLD));
assert(RND_ENTROPY_THRESHOLD*2 <= 20); /* XXX SHA knowledge */
KASSERT(RND_ENTROPY_THRESHOLD*2 <= 20); /* XXX SHA knowledge */
while (good && (remain != 0)) {
/*