Transition /proc/cpuinfo -> sysfs

Following this email will be a set of patches that provide a first pass at exporting information currently in /proc/cpuinfo to sysfs for i386 and ARM. There are applications that are dependent on /proc/cpuinfo atm, so we can't just kill it, but we should agree on a kill date and require all arches & apps to transition by that point. I've added code to proc_misc.c to remind the user that the cpuinfo interface is going away (currently using arbitrary date ~1 year from now). I've also added a pointer to struct cpu that can be used by arch code to store any information that might be needed during attribute printing.

Couple of questions:

- Do we want to standardize on a set of attributes that all CPUs must provide to sysfs? bogomips, L1 cache size/type/sets/assoc (when available), L2 cache (L3..L4), etc? This would make the output be the same across architectures for those features and would simply require adding some fields to struct cpu to carry this data and some generic ATTR entries to drivers/base/cpu.c. I am all for standardized interfaces so I'll do a first pass at this if desired.

- On an HT setup, do we want link(s) pointing to sibling(s)?

- Currently the bug and feature fields on x86 have "yes" and "no". Do we want the same in sysfs or 1|0?

- Instead of dumping the "flags" field, should we just dump cpu registers as hex strings and let the user decode (as the comment for the x86_cap_flags implies.

I'll try to do MIPS, SH, and PPC when I get a chance (all I have access to), but have other things to do for a while, so want comments on above questions first.

Tnx,
~Deepak

Deepak Saxena - dsaxena at plexity dot net - http://www.plexity.net/

"Unlike me, many of you have accepted the situation of your imprisonment and
 will die here like rotten cabbages." - Number 6