de-modularising for the win!

[Peter Jones]

Bill Nottingham wrote:
> See various and sundry plumber's conf discussions.
> 
> Comments? (The netfilter stuff needs further investigation.)

Also, please add these, since they're nearly always loaded (patch is on 
top of yours):

diff --git a/config-generic b/config-generic
index 0f43c42..de33831 100644
--- a/config-generic
+++ b/config-generic
@@ -640,14 +640,14 @@ CONFIG_BLK_DEV_DM=y
  CONFIG_DM_CRYPT=m
  CONFIG_DM_DEBUG=y
  # CONFIG_DM_DELAY is not set
-CONFIG_DM_MIRROR=m
+CONFIG_DM_MIRROR=y
  CONFIG_DM_MULTIPATH=m
  CONFIG_DM_MULTIPATH_EMC=m
  CONFIG_DM_MULTIPATH_HP=m
  CONFIG_DM_MULTIPATH_RDAC=m
-CONFIG_DM_SNAPSHOT=m
+CONFIG_DM_SNAPSHOT=y
  CONFIG_DM_UEVENT=y
-CONFIG_DM_ZERO=m
+CONFIG_DM_ZERO=y

  #
  # Fusion MPT device support