[Midnightbsd-cvs] src [8390] trunk/usr.bin/ktrdump/ktrdump.c: ktr entries do not have to be a power of 2

[laffer1 at midnightbsd.org]

Revision: 8390
          http://svnweb.midnightbsd.org/src/?rev=8390
Author:   laffer1
Date:     2016-09-18 15:21:29 -0400 (Sun, 18 Sep 2016)
Log Message:
-----------
ktr entries do not have to be a power of 2

Modified Paths:
--------------
    trunk/usr.bin/ktrdump/ktrdump.c

Modified: trunk/usr.bin/ktrdump/ktrdump.c
===================================================================
--- trunk/usr.bin/ktrdump/ktrdump.c	2016-09-18 19:20:23 UTC (rev 8389)
+++ trunk/usr.bin/ktrdump/ktrdump.c	2016-09-18 19:21:29 UTC (rev 8390)
@@ -218,7 +218,7 @@
 	 * Now tear through the trace buffer.
 	 */
 	if (!iflag)
-		i = (index - 1) & (entries - 1);
+		i = (index - 1) % entries;
 	tlast = -1;
 	for (;;) {
 		if (buf[i].ktr_desc == NULL)
@@ -286,7 +286,7 @@
 		if (!iflag) {
 			if (i == index)
 				break;
-			i = (i - 1) & (entries - 1);
+			i = (i - 1) % entries;
 		} else {
 			if (++i == entries)
 				break;