ppc64 kernel config changes heads up

[Dan Horák]

On Fri, 26 Jun 2015 22:40:02 +0100
Peter Robinson <pbrobinson at gmail.com> wrote:

> Hi All,
> 
> If you don't care about powerpc you can stop reading :-)
> 
> If you do.... I went to do what I thought was a basic fix up to the
> kernel builds on POWER to get rid of the last bits of the ppc32
> legacy, on my list for some time, and it has become more of a slightly
> epic slash and burn!

generally ACK as it goes into the right direction :-)

one note - if I recall correctly from the F-22 testing on G5, then the
power mgmt depends on I2C, but because it is built as module, all the
power mgmt modules are built as modules and not as built-in as
requested in our kernel config. My idea was to make I2C built-in for
all arches (and move it to generic config), but I haven't get to
actually do the cleanup.

> The resulting output kernel configs are for all intents and purpose
> unchanged but the git diff is some what epic.
> 
> The top level of the changes are:
> 
> Core changes that apply too all kernels (ppc64/ppc64p7/ppc64le) reside
> in config-powerpc64-generic
> 
> config-powerpc64 -> legacy platforms that are older than POWER7 and
> their dependencies (here lies the ghosts of PowerPC G5 and friends).
> 
> config-powerpc64le and config-powerpc64p7 contain anything specific to
> POWER7 and newer that might affect older platforms, or LE/BE specific
> to p7 and later
> 
> I've removed anything that pertains to PPC32 and Cell processors (the
> later were all disabled now anyway) but if the kernel docs were wrong
> and they do by chance work on some other 64 bit platform that still
> works do let me know.
> 
> So the only thing of real note is the ppc64p7 and ppc64le configs no
> longer have any old IDE configs enabled or any of the legacy Apple
> bits pulled in, I don't believe that should cause any pain what so
> ever, I only bring this up because it's the only thing of note on
> diffs of before/after resulting config diffs.
> 
> So ultimately please test kernel builds going forward. There's a
> scratch build here [1] until we get an official one to test. There's
> no perf packages, that appears broeken... even on vanilla pre commit
> :)
> 
> For those that are morbidly interested in the diff (and don't have the
> Fedora kernel package check out) you can see that here [2].
> 
> Ultimately the large git commit looks quite scary but the actual
> change to the 3 configs are minimal and I believe this should make
> things cleaner moving forward :-)
> 
> I look forward to the testing feedback including any further suggested
> cleanups to the new configs, oh and please test :-)


		Dan