linux-kernel - Re: [PATCH] mmu notifiers #v8

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Date:	Mon, 3 Mar 2008 04:34:28 +0100
From:	Nick Piggin <npiggin@...e.de>
To:	Andrea Arcangeli <andrea@...ranet.com>
Cc:	Jack Steiner <steiner@....com>, akpm@...ux-foundation.org,
	Robin Holt <holt@....com>, Avi Kivity <avi@...ranet.com>,
	Izik Eidus <izike@...ranet.com>,
	kvm-devel@...ts.sourceforge.net,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	general@...ts.openfabrics.org,
	Steve Wise <swise@...ngridcomputing.com>,
	Roland Dreier <rdreier@...co.com>,
	Kanoj Sarcar <kanojsarcar@...oo.com>,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	daniel.blueman@...drics.com, Christoph Lameter <clameter@....com>
Subject: Re: [PATCH] mmu notifiers #v8

On Sun, Mar 02, 2008 at 04:54:57PM +0100, Andrea Arcangeli wrote:
> Difference between #v7 and #v8:

This one on top of the previous patch

[patch] mmu-v8: typesafe

Move definition of struct mmu_notifier and struct mmu_notifier_ops under
CONFIG_MMU_NOTIFIER to ensure they doesn't get dereferenced when they
don't make sense.

Signed-off-by: Nick Piggin <npiggin@...e.de>
---
Index: linux-2.6/include/linux/mmu_notifier.h
===================================================================
--- linux-2.6.orig/include/linux/mmu_notifier.h
+++ linux-2.6/include/linux/mmu_notifier.h
@@ -3,8 +3,12 @@
 
 #include <linux/list.h>
 #include <linux/spinlock.h>
+#include <linux/mm_types.h>
 
 struct mmu_notifier;
+struct mmu_notifier_ops;
+
+#ifdef CONFIG_MMU_NOTIFIER
 
 struct mmu_notifier_ops {
 	/*
@@ -53,10 +57,6 @@ struct mmu_notifier {
 	const struct mmu_notifier_ops *ops;
 };
 
-#ifdef CONFIG_MMU_NOTIFIER
-
-#include <linux/mm_types.h>
-
 static inline int mm_has_notifiers(struct mm_struct *mm)
 {
 	return unlikely(!hlist_empty(&mm->mmu_notifier_list));
--
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