The patch titled
     make drivers/md/dm-snap.c:ksnapd static
has been added to the -mm tree.  Its filename is
     make-drivers-md-dm-snapcksnapd-static.patch

See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this

------------------------------------------------------
Subject: make drivers/md/dm-snap.c:ksnapd static
From: Adrian Bunk <bunk@stusta.de>

Signed-off-by: Adrian Bunk <bunk@stusta.de>
Cc: Alasdair G Kergon <agk@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
 drivers/md/dm-snap.c |    2 +-
 1 files changed, 1 insertion(+), 1 deletion(-)

Index: linux-2.6.19/drivers/md/dm-snap.c
===================================================================
--- linux-2.6.19.orig/drivers/md/dm-snap.c	2006-12-06 20:48:30.000000000 +0000
+++ linux-2.6.19/drivers/md/dm-snap.c	2006-12-06 20:49:28.000000000 +0000
@@ -39,7 +39,7 @@
  */
 #define SNAPSHOT_PAGES 256
 
-struct workqueue_struct *ksnapd;
+static struct workqueue_struct *ksnapd;
 static void flush_queued_bios(void *data);
 
 struct pending_exception {