diff --git a/[refs] b/[refs]
index 79be0c789261..8fc5880a598e 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: b2315372eac9cd9f622c32a93e323cf6f0f03462
+refs/heads/master: 768cc2d3b2768ca34f254e8190f1f9e297b09ad4
diff --git a/trunk/arch/powerpc/Kconfig b/trunk/arch/powerpc/Kconfig
index 00099efe0e9f..66a329534b5e 100644
--- a/trunk/arch/powerpc/Kconfig
+++ b/trunk/arch/powerpc/Kconfig
@@ -181,16 +181,17 @@ config MATH_EMULATION
 	  instructions to run.
 
 config IOMMU_VMERGE
-	bool "Enable IOMMU virtual merging (EXPERIMENTAL)"
-	depends on EXPERIMENTAL && PPC64
-	default n
+	bool "Enable IOMMU virtual merging"
+	depends on PPC64
+	default y
 	help
 	  Cause IO segments sent to a device for DMA to be merged virtually
 	  by the IOMMU when they happen to have been allocated contiguously.
 	  This doesn't add pressure to the IOMMU allocator. However, some
 	  drivers don't support getting large merged segments coming back
-	  from *_map_sg(). Say Y if you know the drivers you are using are
-	  properly handling this case.
+	  from *_map_sg().
+
+	  Most drivers don't have this problem; it is safe to say Y here.
 
 config HOTPLUG_CPU
 	bool "Support for enabling/disabling CPUs"