See links below for more details:
http://thread.gmane.org/gmane.comp.handhelds.openembedded/21326
http://thread.gmane.org/gmane.comp.handhelds.openembedded/21816

Signed-off-by: Denys Dmytriyenko <denis@denix.org>
Acked-by: Mike Westerhof <mwester@dls.net>
Acked-by: Philip Balister <philip@balister.org>
Acked-by: Khem Raj <raj.khem@gmail.com>
Acked-by: Marcin Juszkiewicz <hrw@openembedded.org>
Acked-by: Koen Kooi <koen@openembedded.org>
Acked-by: Frans Meulenbroeks <fransmeulenbroeks@gmail.com>

try to discourage people from using KERNEL_SOURCE when writing
kernel module recipes.  KERNEL_SOURCE is located in the work dir
and is not available if rm_work class is used.

    This is a partial revert of aa03004ace2fabb135a6208ef8c2d2b312aa7b0b. The
    approach that was taken leads to disagreement and the change was pushed
    too early. DISTRO_PR is going to say and will be used inside the package
    creation. There will be more disucssion on the list about where to continue
    from here.

    Allow a distribution to globally bump the PR of every package
    this is useful when there was a change in the toolchain and
    every package is going to be different.

    find packages/ \( -name '*.bb' -or -name '*.inc' \) -exec sed -i s/"^PR="/"FILE_PR ="/ {} \;
    find packages/ \( -name '*.bb' -or -name '*.inc' \) -exec sed -i s/"^PR ="/"FILE_PR ="/ {} \;

Acked-By: Koen Kooi <koen@openembedded.org>