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diff --git a/v4l_experimental/pvrusb2/Makefile b/v4l_experimental/pvrusb2/Makefile
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+
+# Mike Isely <isely@pobox.com>
+
+# This is the module build file for pvrusb2.  It requires the kbuild
+# system from any 2.6.x kernel.  It requires the kbuild system from
+# any 2.6.x kernel (but it's only been tried against kernels 2.6.10
+# and later).  This WILL NOT BUILD for 2.4.x kernels.  Don't even
+# bother trying.  Even if you were to fix this build for 2.4.x, you
+# would still have to port the driver as well.  Everything here
+# assumes 2.6.x.
+
+# To build, you can just run this Makefile.  There are several
+# variables you may want to override however:
+
+# KDIR - Path to kernel source tree
+# KREL - Version of kernel, i.e. 'uname -r' output
+# INSTALL_MOD_DIR - where within the module tree to put the driver
+
+# If you do not override anything, then KREL is set to the result of
+# 'uname -r', KDIR is set to '/lib/modules/$(KREL)/build', and
+# INSTALL_MOD_DIR is set to 'pvrusb2'.  If you choose to override
+# KDIR, then you do _NOT_ need to worry about KREL, as KREL is only
+# used here when calculating KDIR.  If the default path for KDIR is
+# only wrong in terms of version element, then you can just override
+# KREL with the corrected value.
+
+# Sensible build targets include 'modules' (same as no target),
+# 'install', and 'clean'
+
+ifeq ($(KERNELRELEASE),)
+
+  # Override any of these if you'd like
+  ifeq ($(strip $(KREL)),)
+    KREL := $(shell uname -r)
+  endif
+  ifeq ($(strip $(KDIR)),)
+    KDIR := /lib/modules/$(KREL)/build
+  endif
+  INSTALL_MOD_DIR := pvrusb2
+
+  .PHONY: all default install clean modules
+  default: all
+  all: modules
+
+  modules modules_install clean:
+	$(MAKE) INSTALL_MOD_DIR=$(INSTALL_MOD_DIR) -C $(KDIR) M=$(shell pwd) CONFIG_VIDEO_PVRUSB2=m $@
+
+  install:
+	$(MAKE) INSTALL_MOD_DIR=$(INSTALL_MOD_DIR) -C $(KDIR) M=$(shell pwd) CONFIG_VIDEO_PVRUSB2=m modules_install
+
+else
+
+  # Backwards compatibility in case kbuild can't find Kbuild on its own.
+  include Kbuild
+
+endif
+