[Bug 224532] Remove resident count from procfs map

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=224532

--- Comment #2 from commit-hook at freebsd.org ---
A commit references this bug:

Author: kib
Date: Thu Dec 28 13:23:13 UTC 2017
New revision: 327286
URL: https://svnweb.freebsd.org/changeset/base/327286

Log:
  Reuse kern_proc_vmmap_resident() for procfs_map resident count.

  The existing algorithm in procfs_map() to calculate count of resident
  pages in an entry is too primitive, resulting in too long run time for
  large sparse mapping entries.  Re-use the kern_proc_vmmap_resident()
  from kern_proc.c which only looks at the existing pages in the
  iterations.

  Also, this makes procfs to honor kern.proc_vmmap_skip_resident_count,
  if user does not need this information.

  Reported by:  Glenn Weinberg <glenn.weinberg at intel.com>
  PR:   224532
  No objections from:   des (procfs maintainer)
  Sponsored by: The FreeBSD Foundation
  MFC after:    1 week
  Differential revision:        https://reviews.freebsd.org/D13595

Changes:
  head/sys/fs/procfs/procfs_map.c

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