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Use percpu_foreach instead of manual iteration.

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This commit is contained in:
riastradh 2014-08-11 13:06:31 +00:00
parent 215d8661dd
commit 7e518a1255
1 changed files with 15 additions and 16 deletions
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31
sys/crypto/cprng_fast/cprng_fast.c
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@ -1,4 +1,4 @@
/* $NetBSD: cprng_fast.c,v 1.7 2014/08/11 13:01:58 riastradh Exp $ */
/* $NetBSD: cprng_fast.c,v 1.8 2014/08/11 13:06:31 riastradh Exp $ */
/*-
* Copyright (c) 2014 The NetBSD Foundation, Inc.
@ -30,7 +30,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: cprng_fast.c,v 1.7 2014/08/11 13:01:58 riastradh Exp $");
__KERNEL_RCSID(0, "$NetBSD: cprng_fast.c,v 1.8 2014/08/11 13:06:31 riastradh Exp $");
#include <sys/types.h>
#include <sys/param.h>
@ -203,6 +203,7 @@ struct cprng_fast {
__CTASSERT(sizeof ((struct cprng_fast *)0)->key == CPRNG_FAST_SEED_BYTES);
static void cprng_fast_init_cpu(void *, void *, struct cpu_info *);
static void cprng_fast_schedule_reseed(struct cprng_fast *);
static void cprng_fast_intr(void *);
@ -218,27 +219,25 @@ static void *cprng_fast_softint __read_mostly;
void
cprng_fast_init(void)
{
struct cpu_info *ci;
CPU_INFO_ITERATOR cii;
crypto_core_selftest();
cprng_fast_percpu = percpu_alloc(sizeof(struct cprng_fast));
for (CPU_INFO_FOREACH(cii, ci)) {
struct cprng_fast *cprng;
uint8_t seed[CPRNG_FAST_SEED_BYTES];
percpu_traverse_enter();
cprng = percpu_getptr_remote(cprng_fast_percpu, ci);
cprng_strong(kern_cprng, seed, sizeof(seed), FASYNC);
/* Can't do anything about it if not full entropy. */
cprng_fast_seed(cprng, seed);
explicit_memset(seed, 0, sizeof(seed));
percpu_traverse_exit();
}
percpu_foreach(cprng_fast_percpu, &cprng_fast_init_cpu, NULL);
cprng_fast_softint = softint_establish(SOFTINT_SERIAL|SOFTINT_MPSAFE,
&cprng_fast_intr, NULL);
}
static void
cprng_fast_init_cpu(void *p, void *arg __unused, struct cpu_info *ci __unused)
{
struct cprng_fast *const cprng = p;
uint8_t seed[CPRNG_FAST_SEED_BYTES];
cprng_strong(kern_cprng, seed, sizeof seed, FASYNC);
cprng_fast_seed(cprng, seed);
(void)explicit_memset(seed, 0, sizeof seed);
}
static inline int
cprng_fast_get(struct cprng_fast **cprngp)
{