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Date: Wed, 12 Nov 1997 16:18:14 +0100 (CET)
From: frf@xocolatl.com
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Subject: i386/5019: Noisey debugging code in sb_dsp.c
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>Number:         5019
>Category:       i386
>Synopsis:       Noisey debugging code in sb_dsp.c
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Class:          change-request
>Submitter-Id:   current-users
>Arrival-Date:   Wed Nov 12 08:30:02 PST 1997
>Last-Modified:
>Originator:     frf
>Organization:
>Release:        FreeBSD 3.0-CURRENT i386
>Environment:

3.0-CURRENT FreeBSD 3.0-CURRENT #3: Mon Nov 10 22:03:10 CET 1997 
>Description:

Someone left their debugging printf's in /sys/i386/isa/sound/sb_dsp.c

>How-To-Repeat:

Build a kernel with SBPro support and play some music.
Watch your logfiles fill-up.
Nov  9 21:03:14 crux /kernel: dsp_speed 8000
Nov  9 21:03:14 crux /kernel: dsp_speed done 8000
Nov  9 21:03:18 crux /kernel: dsp_speed 8000
Nov  9 21:03:18 crux /kernel: dsp_speed done 8000
Nov 10 15:29:45 crux /kernel: dsp_speed 8000
Nov 10 15:29:45 crux /kernel: dsp_speed done 8000
Nov 10 15:29:45 crux /kernel: dsp_speed 44100
Nov 10 15:29:45 crux /kernel: dsp_speed done 43478
Nov 10 15:29:45 crux /kernel: dsp_speed 44100
Nov 10 15:29:45 crux /kernel: dsp_speed done 43478
Nov 10 15:30:48 crux /kernel: dsp_speed 8000
Nov 10 15:30:48 crux /kernel: dsp_speed done 8000
Nov 10 15:30:48 crux /kernel: dsp_speed 43478
Nov 10 15:30:49 crux /kernel: dsp_speed done 43478
>Fix:

--cut
--- /sys/i386/isa/sound/sb_dsp.c	Fri Oct 31 18:25:05 1997
+++ sys/i386/isa/sound/sb_dsp.c		Wed Nov 12 15:45:38 1997
@@ -231,7 +231,9 @@
     u_long   flags;
     int             max_speed = 44100;
 
-printf("dsp_speed %d\n", speed); /* XXX lr 970601 */
+#ifdef DSP_DEBUG
+    printf("dsp_speed %d\n", speed); /* XXX lr 970601 */
+#endif
     if (speed < 4000)
 	    speed = 4000;
 
@@ -310,7 +312,9 @@
 	speed /= 2;
 
     dsp_current_speed = speed;
-printf("dsp_speed done %d\n", speed);
+#ifdef DSP_DEBUG
+    printf("dsp_speed done %d\n", speed);
+#endif
     return speed;
 }
--cut

or just delete the offending lines 
>Audit-Trail:
>Unformatted: