Module Name: src
Committed By: skrll
Date: Fri Aug 8 07:34:02 UTC 2014
Modified Files:
src/sys/arch/arm/include: mutex.h
Log Message:
Update a comment. Probably still needs tweaking further.
To generate a diff of this commit:
cvs rdiff -u -r1.16 -r1.17 src/sys/arch/arm/include/mutex.h
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/sys/arch/arm/include/mutex.h
diff -u src/sys/arch/arm/include/mutex.h:1.16 src/sys/arch/arm/include/mutex.h:1.17
--- src/sys/arch/arm/include/mutex.h:1.16 Thu Jun 12 08:50:52 2014
+++ src/sys/arch/arm/include/mutex.h Fri Aug 8 07:34:02 2014
@@ -1,4 +1,4 @@
-/* $NetBSD: mutex.h,v 1.16 2014/06/12 08:50:52 ozaki-r Exp $ */
+/* $NetBSD: mutex.h,v 1.17 2014/08/08 07:34:02 skrll Exp $ */
/*-
* Copyright (c) 2002, 2007 The NetBSD Foundation, Inc.
@@ -35,15 +35,15 @@
/*
* The ARM mutex implementation is troublesome, because pre-v6 ARM lacks a
* compare-and-swap operation. However, there aren't any MP pre-v6 ARM
- * systems to speak of. We are mostly concerned with atomicity with respect
- * to interrupts.
+ * systems to speak of.
*
- * ARMv6, however, does have ldrex/strex, and can thus implement an MP-safe
- * compare-and-swap.
+ * ARMv6 and later, however, does have ldrex/strex, and can thus implement an
+ * MP-safe compare-and-swap.
*
- * So, what we have done is impement simple mutexes using a compare-and-swap.
+ * So, what we have done is implement simple mutexes using a compare-and-swap.
* We support pre-ARMv6 by implementing CAS as a restartable atomic sequence
- * that is checked by the IRQ vector. MP-safe ARMv6 support will be added later.
+ * that is checked by the IRQ vector.
+ *
*/
#ifndef __MUTEX_PRIVATE
