[smithj@dhcp219 kernel]$ cat kernel.recipe 
#
# Copyright (c) 2005-2007 rPath, Inc.
# This file is distributed under the terms of the MIT License.
# A copy is available at http://www.rpath.com/permanent/mit-license.html
#

loadSuperClass('kernelpackage')
class Kernel(KernelPackageRecipe):
    name = 'kernel'
    version = '2.6.21_rc2_mm1'

    # override this function so we can have r.macros.version set to the correct
    # thing so modules will be installed in the correct place...
    def unpackBase(r):
        r.macros.upver = r.version[:r.version.rindex('_')].replace('_', '-')
        r.addArchive('http://ftp2.kernel.org/pub/linux/kernel/v%(majorversion)s/testing/linux-%(upver)s.tar.bz2', keyid='517D0F0E')
        r.addAction('chmod -R go-w .')
        r.addPatch('linux-2.4.0-nonintconfig.patch')

    def unpack(r):
        r.macros.version = r.version.replace('_', '-')
        r.addPatch('http://www2.kernel.org/pub/linux/kernel/people/akpm/patches/%(major_version)s/%(upver)s/%(version)s/%(version)s.bz2', keyid='517D0F0E')
        # we need this so we can undo a few of the nastier patches
        r.addArchive('http://www2.kernel.org/pub/linux/kernel/people/akpm/patches/%(major_version)s/%(upver)s/%(version)s/%(version)s-broken-out.tar.bz2', keyid='517D0F0E')
        r.addAction('patch -p1 -R < ../broken-out/detect-atomic-counter-underflows.patch')

    # for this mm kernel, we don't really care what the other options are, so
    # long as we get unionfs, so we override configure
    def configure(r):
        #FIXME: should be r.extraSource(addConfigs(r))... see CNY-1369
        r.extraSource(globals()['kernelpackage-recipe'].module.addConfigs(r))
        r.Make('oldconfig < /dev/null')
        r.Replace('# CONFIG_UNION_FS is not set',
            'CONFIG_UNION_FS=m\n# CONFIG_UNION_FS_XATTR is not set', '.config')