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From: Alexander Motin <mav@FreeBSD.org>
Date: Fri, 23 Jul 2010 08:20:14 +0000 (UTC)
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Subject: svn commit: r210404 - head/sys/mips/mips
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Author: mav
Date: Fri Jul 23 08:20:14 2010
New Revision: 210404
URL: http://svn.freebsd.org/changeset/base/210404

Log:
  Add some comments.

Modified:
  head/sys/mips/mips/tick.c

Modified: head/sys/mips/mips/tick.c
==============================================================================
--- head/sys/mips/mips/tick.c	Fri Jul 23 07:46:55 2010	(r210403)
+++ head/sys/mips/mips/tick.c	Fri Jul 23 08:20:14 2010	(r210404)
@@ -259,7 +259,7 @@ clock_intr(void *arg)
 		compare_next = count + cycles_per_tick;
 		DPCPU_SET(compare_ticks, compare_next);
 		mips_wr_compare(compare_next);
-	} else
+	} else	/* In one-shot mode timer should be stopped after the event. */
 		mips_wr_compare(0xffffffff);
 
 	critical_enter();
@@ -352,7 +352,7 @@ clock_attach(device_t dev)
 	sc->et.et_quality = 800;
 	sc->et.et_frequency = counter_freq;
 	sc->et.et_min_period.sec = 0;
-	sc->et.et_min_period.frac = 0x00004000LLU << 32;
+	sc->et.et_min_period.frac = 0x00004000LLU << 32; /* To be safe. */
 	sc->et.et_max_period.sec = 0xfffffffeU / sc->et.et_frequency;
 	sc->et.et_max_period.frac =
 	    ((0xfffffffeLLU << 32) / sc->et.et_frequency) << 32;