[yocto] [meta-raspberrypi] Linux Kernel In Temporary Source Code Directory Is Not a git repository"

[Thomas A. F. Thorne MEng AUS MIET]

I am having some trouble attempting to create Kernel patches as per the
Yocto Project Development Manual, section 5.10.3. Creating the Patch:
http://www.yoctoproject.org/docs/2.1.1/dev-manual/dev-manual.html#creating-the-patch

When I get to the stage that says:

> Stage and commit your changes: These Git commands display the modified
> file, stage it, and then commit the file:
> $ git status
I get the response:

$ git status
fatal: Not a git repository (or any of the parent directories): .git


I have a rpi-layer (taken from ) which I have generated binaries for the
RasperyPi 3 from.  I wanted to modify a couple of kernel modules to add
support for a Quectel EC25 module.  I located the relevant module code
and modified it in my temporary source code area:
~/work/rpi-layer/build/tmp/work/cortexa7hf-neon-vfpv4-poky-linux-gnueabi/linux-libc-headers/4.4-r0/linux-4.4/drivers/usb/serial

I guess there is something goofy about the way the raspberrypi layer
works and this is actually a special kernel build which is not held in a
git repository?  If that is the case, why can I a .gitignore file in the
..linux-libc-headers/4.4-r0/linux-4.4 directory? 

I could create a git patch by hand for the next stage but it would be
much easier to modify a clone of the correct repository. 

Can anyone spot my obvious mistake? 

Regards,

-- 
Thomas A. F. Thorne MEng. AUS MIET
*Software Engineer*

*NET2EDGE*

Tel: +44 3450 130 030 <tel:+443450130030>
Email: Thomas.Thorne at Net2Edge.com <mailto:Thomas.Thorne at Net2Edge.com>
Web: http://www.Net2Edge.com/ <http://www.Net2Edge.com>

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