linux-kernel - [git pull] core fixes

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Date:	Tue, 13 Jan 2009 02:16:14 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Subject: [git pull] core fixes

Linus,

Please pull the latest core-fixes-for-linus git tree from:

   git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip.git core-fixes-for-linus

 Thanks,

	Ingo

------------------>
Ingo Molnar (1):
      smp_call_function_single(): be slightly less stupid, fix #2

Peter Zijlstra (1):
      lockdep, mm: fix might_fault() annotation


 kernel/up.c |    1 +
 mm/memory.c |    9 +++++++++
 2 files changed, 10 insertions(+), 0 deletions(-)

diff --git a/kernel/up.c b/kernel/up.c
index c04b9dc..1ff27a2 100644
--- a/kernel/up.c
+++ b/kernel/up.c
@@ -2,6 +2,7 @@
  * Uniprocessor-only support functions.  The counterpart to kernel/smp.c
  */
 
+#include <linux/interrupt.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/smp.h>
diff --git a/mm/memory.c b/mm/memory.c
index e009ce8..c2d4c47 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -3165,6 +3165,15 @@ void print_vma_addr(char *prefix, unsigned long ip)
 #ifdef CONFIG_PROVE_LOCKING
 void might_fault(void)
 {
+	/*
+	 * Some code (nfs/sunrpc) uses socket ops on kernel memory while
+	 * holding the mmap_sem, this is safe because kernel memory doesn't
+	 * get paged out, therefore we'll never actually fault, and the
+	 * below annotations will generate false positives.
+	 */
+	if (segment_eq(get_fs(), KERNEL_DS))
+		return;
+
 	might_sleep();
 	/*
 	 * it would be nicer only to annotate paths which are not under
--
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