Linus has been graphically describing what he thinks of the fragmented state of ARM manufacturers who make it very difficult for a single Linux kernel to reliably work on the staggering variety of ARM chips on the market.  So many manufacturers license ARM technology under an agreement which allows them a lot of leeway to make changes to the architecture which leads to the development nightmares which are preventing Linux from offering the same compatibility for ARM as they do for x86 chips. This is poised to change as The Register has announced that Linus has committed new source code which could finally lead to multi-platform support.  Calxeda and other companies pushing ARM based server solutions can't wait for this to finish testing and be deployed.

"Based on Johansson’s source code changes, one Linux kernel build could supports devices of all kinds. He said electronics capable of running the new kernel include system-on-a-chip machines, storage devices, cameras, medical devices and Calexda's efforts to put ARM-powered chips in HP ProLiant SL6500 servers."

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