[Bug 200802] MAXCPU bump to 256 breaks ABI for cpuset_getaffinity/setaffinity

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=200802

--- Comment #3 from commit-hook at freebsd.org ---
A commit references this bug:

Author: kib
Date: Tue Jun 23 06:30:37 UTC 2015
New revision: 284720
URL: https://svnweb.freebsd.org/changeset/base/284720

Log:
  Revert part of the r283303 (by jhb):

  Revert MFC of r270223, which bumped MAXCPU on amd64 from 64 to 256.
  The cpuset_getaffinity(2) and cpuset_setaffinity(2) check minimum set
  size, which now fails for binaries compiled on 10.0 with MAXCPU == 64.

  Submitted by:    jhb
  PR:      200802

Changes:
_U  stable/10/
  stable/10/sys/amd64/include/param.h
  stable/10/sys/sys/param.h

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