PERFORCE change 1199532 for review

[John Baldwin]

http://p4web.freebsd.org/@@1199532?ac=10

Change 1199532 by jhb at jhb_ralph on 2014/08/29 17:49:33

	Don't require MAP_SHARED or MAP_PRIVATE with MAP_ANON.
	Note that we can't simply for MAP_SHARED on for MAP_ANON
	as MAP_SHARED with MAP_ANON determines whether or not
	anon regions are shared with future children.

Affected files ...

.. //depot/projects/smpng/sys/vm/vm_mmap.c#106 edit

Differences ...

==== //depot/projects/smpng/sys/vm/vm_mmap.c#106 (text+ko) ====

@@ -248,13 +248,10 @@
 		return (EINVAL);
 	if ((prot & ~(PROT_READ | PROT_WRITE | PROT_EXEC | PROT_NONE)) != 0)
 		return (EINVAL);
-
-	/* Exactly one of MAP_SHARED or MAP_PRIVATE must be given. */
-	if ((flags & (MAP_SHARED | MAP_PRIVATE)) == 0 ||
+	if ((flags & (MAP_ANON | MAP_SHARED | MAP_PRIVATE)) == 0 ||
 	    (flags & (MAP_SHARED | MAP_PRIVATE)) == (MAP_SHARED | MAP_PRIVATE))
 		return (EINVAL);
 
-
 	/*
 	 * Align the file position to a page boundary,
 	 * and save its page offset component.