[Clfs-support] sub-level kernel patch in clfs recipes question

[Chris Staub]

On 02/11/15 13:52, lux-integ wrote:
> Greetings,
>
> Can someone explain the reason for the use of  'sub-level' kernel patches'
> for example:-
> xzcat ../patch-3.14.21.xz | patch -Np1 -i -
>
> mentioned in clfs-builds :-
> http://clfs.org/view/git/x86_64/cross-tools/linux-headers.html
> and here
> http://clfs.org/view/git/x86_64/final-system/linux-headers.html
> and here
> http://clfs.org/view/git/x86_64/bootable/kernel.html
>
>
> ( I am using linux-3.18.5 and the correspending patch-3.18.5.xz )
> For the first time I  applied  the required patch  in all three places   and
> when  I came to compile the kernel  -make failed
> Bit it compiled fine  without  the patch.
>
> ( I did  repeat runs  and executed 'make mrproper'  after applying the patch )
> and make failed  every time.)
>
> Comments welcomed.

Look a bit more closely. Note that the actual linux tarball used isn't 
3.14.21, but 3.14 (see the "Note" on the page, and look again at the 
Packages download page). The purpose of the patch is to update the 
kernel sublevel version - the 3.14.21 patch is applied to the 3.14 
source tree, and updates it to 3.14.21. Similarly, if you're using 
3.18.5, you would download 3.18, then apply the 3.18.5 patch - or, just 
use 3.18.5 if you've already downloaded that tarball.