[src/trunk]: src/sys/crypto/cprng_fast Use percpu_foreach instead of manual i...

[riastradh <riastradh%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/492f40cd22e6
branches:  trunk
changeset: 801613:492f40cd22e6
user:      riastradh <riastradh%NetBSD.org@localhost>
date:      Mon Aug 11 13:06:31 2014 +0000

description:
Use percpu_foreach instead of manual iteration.

diffstat:

 sys/crypto/cprng_fast/cprng_fast.c |  31 +++++++++++++++----------------
 1 files changed, 15 insertions(+), 16 deletions(-)

diffs (66 lines):

diff -r dd8ebffcd41b -r 492f40cd22e6 sys/crypto/cprng_fast/cprng_fast.c
--- a/sys/crypto/cprng_fast/cprng_fast.c        Mon Aug 11 13:01:58 2014 +0000
+++ b/sys/crypto/cprng_fast/cprng_fast.c        Mon Aug 11 13:06:31 2014 +0000
@@ -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 @@
 
 __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 @@
 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)
 {