svn commit: r191278 - in head/sys: amd64/include arm/include i386/include ia64/include mips/include powerpc/include sparc64/include sun4v/include

[Robert Watson]

Author: rwatson
Date: Sun Apr 19 21:26:36 2009
New Revision: 191278
URL: http://svn.freebsd.org/changeset/base/191278

Log:
  Add description and cautionary note regarding CACHE_LINE_SIZE.
  
  MFC after:	2 weeks
  Suggested by:	alc

Modified:
  head/sys/amd64/include/param.h
  head/sys/arm/include/param.h
  head/sys/i386/include/param.h
  head/sys/ia64/include/param.h
  head/sys/mips/include/param.h
  head/sys/powerpc/include/param.h
  head/sys/sparc64/include/param.h
  head/sys/sun4v/include/param.h

Modified: head/sys/amd64/include/param.h
==============================================================================
--- head/sys/amd64/include/param.h	Sun Apr 19 20:53:47 2009	(r191277)
+++ head/sys/amd64/include/param.h	Sun Apr 19 21:26:36 2009	(r191278)
@@ -89,6 +89,10 @@
 #define	ALIGN(p)		_ALIGN(p)
 #define	ALIGNED_POINTER(p,t)	_ALIGNED_POINTER(p,t)
 
+/*
+ * CACHE_LINE_SIZE is the compile-time maximum cache line size for an
+ * architecture.  It should be used with appropriate caution.
+ */
 #ifndef CACHE_LINE_SHIFT
 #define	CACHE_LINE_SHIFT	6
 #endif

Modified: head/sys/arm/include/param.h
==============================================================================
--- head/sys/arm/include/param.h	Sun Apr 19 20:53:47 2009	(r191277)
+++ head/sys/arm/include/param.h	Sun Apr 19 21:26:36 2009	(r191278)
@@ -81,6 +81,10 @@
 #define	ALIGNBYTES	_ALIGNBYTES
 #define	ALIGN(p)	_ALIGN(p)
 
+/*
+ * CACHE_LINE_SIZE is the compile-time maximum cache line size for an
+ * architecture.  It should be used with appropriate caution.
+ */
 #ifndef CACHE_LINE_SHIFT
 #define	CACHE_LINE_SHIFT	6
 #endif

Modified: head/sys/i386/include/param.h
==============================================================================
--- head/sys/i386/include/param.h	Sun Apr 19 20:53:47 2009	(r191277)
+++ head/sys/i386/include/param.h	Sun Apr 19 21:26:36 2009	(r191278)
@@ -74,6 +74,10 @@
 #define ALIGNBYTES	_ALIGNBYTES
 #define ALIGN(p)	_ALIGN(p)
 
+/*
+ * CACHE_LINE_SIZE is the compile-time maximum cache line size for an
+ * architecture.  It should be used with appropriate caution.
+ */
 #ifndef CACHE_LINE_SHIFT
 #define	CACHE_LINE_SHIFT	6
 #endif

Modified: head/sys/ia64/include/param.h
==============================================================================
--- head/sys/ia64/include/param.h	Sun Apr 19 20:53:47 2009	(r191277)
+++ head/sys/ia64/include/param.h	Sun Apr 19 21:26:36 2009	(r191278)
@@ -99,6 +99,10 @@
 #define	ALIGN(p)		_ALIGN(p)
 #define ALIGNED_POINTER(p,t)	_ALIGNED_POINTER(p,t)
 
+/*
+ * CACHE_LINE_SIZE is the compile-time maximum cache line size for an
+ * architecture.  It should be used with appropriate caution.
+ */
 #ifndef CACHE_LINE_SHIFT
 #define	CACHE_LINE_SHIFT	6
 #endif

Modified: head/sys/mips/include/param.h
==============================================================================
--- head/sys/mips/include/param.h	Sun Apr 19 20:53:47 2009	(r191277)
+++ head/sys/mips/include/param.h	Sun Apr 19 21:26:36 2009	(r191278)
@@ -89,6 +89,10 @@
 #define	ALIGNBYTES	_ALIGNBYTES
 #define	ALIGN(p)	_ALIGN(p)
 
+/*
+ * CACHE_LINE_SIZE is the compile-time maximum cache line size for an
+ * architecture.  It should be used with appropriate caution.
+ */
 #ifndef CACHE_LINE_SHIFT
 #define	CACHE_LINE_SHIFT	6
 #endif

Modified: head/sys/powerpc/include/param.h
==============================================================================
--- head/sys/powerpc/include/param.h	Sun Apr 19 20:53:47 2009	(r191277)
+++ head/sys/powerpc/include/param.h	Sun Apr 19 21:26:36 2009	(r191278)
@@ -79,6 +79,10 @@
 #define	ALIGNBYTES	_ALIGNBYTES
 #define	ALIGN(p)	_ALIGN(p)
 
+/*
+ * CACHE_LINE_SIZE is the compile-time maximum cache line size for an
+ * architecture.  It should be used with appropriate caution.
+ */
 #ifndef CACHE_LINE_SHIFT
 #define	CACHE_LINE_SHIFT	7
 #endif

Modified: head/sys/sparc64/include/param.h
==============================================================================
--- head/sys/sparc64/include/param.h	Sun Apr 19 20:53:47 2009	(r191277)
+++ head/sys/sparc64/include/param.h	Sun Apr 19 21:26:36 2009	(r191278)
@@ -71,6 +71,10 @@
 #define ALIGNBYTES	_ALIGNBYTES
 #define ALIGN(p)	_ALIGN(p)
 
+/*
+ * CACHE_LINE_SIZE is the compile-time maximum cache line size for an
+ * architecture.  It should be used with appropriate caution.
+ */
 #ifndef CACHE_LINE_SHIFT
 #define	CACHE_LINE_SHIFT	6
 #endif

Modified: head/sys/sun4v/include/param.h
==============================================================================
--- head/sys/sun4v/include/param.h	Sun Apr 19 20:53:47 2009	(r191277)
+++ head/sys/sun4v/include/param.h	Sun Apr 19 21:26:36 2009	(r191278)
@@ -71,6 +71,10 @@
 #define ALIGNBYTES	_ALIGNBYTES
 #define ALIGN(p)	_ALIGN(p)
 
+/*
+ * CACHE_LINE_SIZE is the compile-time maximum cache line size for an
+ * architecture.  It should be used with appropriate caution.
+ */
 #ifndef CACHE_LINE_SHIFT
 #define	CACHE_LINE_SHIFT	6
 #endif