[PATCH 0/4] [RFC] ARM: multiplatform: rename all mach headers
arnd at arndb.de
Wed Aug 22 11:31:42 EDT 2012
On Wednesday 22 August 2012, Nicolas Pitre wrote:
> On Wed, 22 Aug 2012, Arnd Bergmann wrote:
> > There are two branches available in the arm-soc tree:
> > 1. This series,
> > http://git.kernel.org/?p=linux/kernel/git/arm/arm-soc.git;a=shortlog;h=refs/heads/testing/mach-headers
> > This just moves header files around and changes most of the
> > files including them. There are a few remaining drivers
> > and platform files that keep including a generic file name
> > like <mach/uncompress.h>. It remains possible to do that,
> > and I've run extensive tests to ensure I did not break
> > anything with this. However, each of these instances means
> > that there is something that stops working when you get to
> > the real multiplatform kernel and we still need to deal
> > with them one by one.
> The content of <mach/uncompress.h> is fundamentally machine or SOC
> specific. We already know it is generally incompatible with a multi
> platform kernel. So the best way to deal with this at the moment is
> probably to just provide a dummy uncompress.h with empty stubs whenever
> CONFIG_ARCH_MULTIPLATFORM is selected. The effect from this is that
> there wouldn't be any "Uncompressing the kernel... Done" output anymore,
> which should be an acceptable compromise until a better solution is
Yes, that is what I do in the second series.
> One problem is that some (very few) machines define a method in that
> file to keep a hardware watchdog alive. This might not be the case for
> all the intended targets to gather in a single kernel binary image
Ok. I think we have a list of known issues somewhere, we should add this
one. I just can't remember where that list is located.
> Another issue is the fact that some platforms do very ugly
> layer-violating hacks where the decompressor selects a serial port for
> early output and then store that selection in some arbitrary memory
> location for the main kernel to blindly use, making the decompressor
> mandatory. OMAP and Davinci are prime example of such "abuse" which
> would need to be fixed.
Same thing here I guess.
Thanks for the input!
More information about the linux-arm-kernel