Index: head/sys/dev/random/ivy.c
===================================================================
--- head/sys/dev/random/ivy.c	(revision 274380)
+++ head/sys/dev/random/ivy.c	(revision 274381)
@@ -1,135 +1,135 @@
 /*-
  * Copyright (c) 2013 The FreeBSD Foundation
  * Copyright (c) 2013 David E. O'Brien <obrien@NUXI.org>
  * Copyright (c) 2012 Konstantin Belousov <kib@FreeBSD.org>
  * All rights reserved.
  *
  * Portions of this software were developed by Konstantin Belousov
  * under sponsorship from the FreeBSD Foundation.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer
  *    in this position and unchanged.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *
  */
 
 #include <sys/cdefs.h>
 __FBSDID("$FreeBSD$");
 
 #include <sys/param.h>
 #include <sys/kernel.h>
 #include <sys/conf.h>
 #include <sys/lock.h>
 #include <sys/malloc.h>
 #include <sys/module.h>
 #include <sys/random.h>
 #include <sys/systm.h>
 
 #include <machine/md_var.h>
 #include <machine/specialreg.h>
 
 #include <dev/random/randomdev.h>
 #include <dev/random/randomdev_soft.h>
 #include <dev/random/random_adaptors.h>
 #include <dev/random/live_entropy_sources.h>
 
 #define	RETRY_COUNT	10
 
 static u_int random_ivy_read(void *, u_int);
 
 static struct live_entropy_source random_ivy = {
 	.les_ident = "Intel Secure Key RNG",
 	.les_source = RANDOM_PURE_RDRAND,
 	.les_read = random_ivy_read
 };
 
 static inline int
 ivy_rng_store(u_long *buf)
 {
 #ifdef __GNUCLIKE_ASM
 	u_long rndval;
 	int retry;
 
 	retry = RETRY_COUNT;
 	__asm __volatile(
 	    "1:\n\t"
-	    "rdrand	%1\n\t"	/* read randomness into tmp */
+	    "rdrand	%1\n\t"	/* read randomness into rndval */
 	    "jc		2f\n\t" /* CF is set on success, exit retry loop */
 	    "dec	%0\n\t" /* otherwise, retry-- */
 	    "jne	1b\n\t" /* and loop if retries are not exhausted */
 	    "2:"
 	    : "+r" (retry), "=r" (rndval) : : "cc");
 	*buf = rndval;
 	return (retry);
 #else /* __GNUCLIKE_ASM */
 	return (0);
 #endif
 }
 
 /* It is required that buf length is a multiple of sizeof(u_long). */
 static u_int
 random_ivy_read(void *buf, u_int c)
 {
 	u_long *b, rndval;
 	u_int count;
 
 	KASSERT(c % sizeof(*b) == 0, ("partial read %d", c));
 	b = buf;
 	for (count = c; count > 0; count -= sizeof(*b)) {
 		if (ivy_rng_store(&rndval) == 0)
 			break;
 		*b++ = rndval;
 	}
 	return (c - count);
 }
 
 static int
 rdrand_modevent(module_t mod, int type, void *unused)
 {
 	int error = 0;
 
 	switch (type) {
 	case MOD_LOAD:
 		if (cpu_feature2 & CPUID2_RDRAND) {
 			live_entropy_source_register(&random_ivy);
 			printf("random: live provider: \"%s\"\n", random_ivy.les_ident);
 		}
 		break;
 
 	case MOD_UNLOAD:
 		if (cpu_feature2 & CPUID2_RDRAND)
 			live_entropy_source_deregister(&random_ivy);
 		break;
 
 	case MOD_SHUTDOWN:
 		break;
 
 	default:
 		error = EOPNOTSUPP;
 		break;
 
 	}
 
 	return (error);
 }
 
 DEV_MODULE(rdrand, rdrand_modevent, NULL);
 MODULE_VERSION(rdrand, 1);
 MODULE_DEPEND(rdrand, randomdev, 1, 1, 1);