diff --git a/.topdeps b/.topdeps
index 607c231780..7f16cbcdd5 100644
--- a/.topdeps
+++ b/.topdeps
@@ -1,3 +1 @@
-gcc-branch
-fix-branch
-feature-branch
+zfs-branch
diff --git a/.topmsg b/.topmsg
index 03967cdff5..be5391622d 100644
--- a/.topmsg
+++ b/.topmsg
@@ -1,19 +1,6 @@
 From: Brian Behlendorf <behlendorf1@llnl.gov>
-Subject: [PATCH] zfs branch
+Subject: [PATCH] linux arc
 
-Merged result of all changes which are relevant to both Solaris
-and Linux builds of the ZFS code.  These are changes where there
-is a reasonable chance they will be accepted upstream.
-
-Additionally, since this is effectively the root of the linux
-ZFS tree the core linux build system is added here.  This
-includes autogen.sh, configure.ac, m4 macros, some scripts/*,
-and makefiles for all the core ZFS components.  Linux-only
-features which require tweaks to the build system should appear
-on the relevant topic branches.  All autotools products which
-result from autogen.sh are commited to the linux-configure-branch.
-
-This branch also contains the META, ChangeLog, AUTHORS, TODO,
-and README, files.
+Linux VM arc integration.
 
 Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
diff --git a/module/zfs/arc.c b/module/zfs/arc.c
index ace79ad0ad..b416907b65 100644
--- a/module/zfs/arc.c
+++ b/module/zfs/arc.c
@@ -3437,7 +3437,7 @@ arc_init(void)
 	/* Start out with 1/8 of all memory */
 	arc_c = physmem * PAGESIZE / 8;
 
-#ifdef _KERNEL
+#if defined(_KERNEL) && defined(__i386)
 	/*
 	 * On architectures where the physical memory can be larger
 	 * than the addressable space (intel in 32-bit mode), we may