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Date: Fri, 02 Mar 2012 10:09:35 -0800
From: Jeremy Puhlman <jpuhlman@gmail.com>
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To: Darren Hart <dvhart@linux.intel.com>
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Cc: "yocto@yoctoproject.org" <yocto@yoctoproject.org>
Subject: Re: initramfs support in Yocto
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> Can you be more specific about what you are looking for? When you build
> an image with the cpio.gz image type, you can boot that as an initramfs
> with the following kernel command line:
>
> initrd=core-image-minimal-fri2.cpio.gz root=/dev/ram0
>
> If you are looking for something beyond that, please elaborate.
>

When most people refer to initramfs support it is compiling a built
image in to the kernel binary(e.g.  CONFIG_INITRAMFS_SOURCE).
INITRAMFS_IMAGE
is part of the kernel class that should enable that in the build.