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authorRusty Russell <rusty@rustcorp.com.au>2007-07-26 10:41:02 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-07-26 11:35:16 -0700
commitf938d2c892db0d80d144253d4a7b7083efdbedeb (patch)
tree1fbc946a9fb59827001a5d4d5224abe5e624e605 /drivers/lguest/page_tables.c
parentdfb68689bf3e3d31dc9fb5c2bde5379a4ca9b0ec (diff)
lguest: documentation I: Preparation
The netfilter code had very good documentation: the Netfilter Hacking HOWTO. Noone ever read it. So this time I'm trying something different, using a bit of Knuthiness. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/lguest/page_tables.c')
-rw-r--r--drivers/lguest/page_tables.c10
1 files changed, 8 insertions, 2 deletions
diff --git a/drivers/lguest/page_tables.c b/drivers/lguest/page_tables.c
index 1b0ba09b126..f9ca50d8046 100644
--- a/drivers/lguest/page_tables.c
+++ b/drivers/lguest/page_tables.c
@@ -1,5 +1,11 @@
-/* Shadow page table operations.
- * Copyright (C) Rusty Russell IBM Corporation 2006.
+/*P:700 The pagetable code, on the other hand, still shows the scars of
+ * previous encounters. It's functional, and as neat as it can be in the
+ * circumstances, but be wary, for these things are subtle and break easily.
+ * The Guest provides a virtual to physical mapping, but we can neither trust
+ * it nor use it: we verify and convert it here to point the hardware to the
+ * actual Guest pages when running the Guest. :*/
+
+/* Copyright (C) Rusty Russell IBM Corporation 2006.
* GPL v2 and any later version */
#include <linux/mm.h>
#include <linux/types.h>