[Bug 198500] [gjournal] sysctl kern.geom.journal.cache.limit 32 bit integer overflow

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=198500

--- Comment #5 from commit-hook at freebsd.org ---
A commit references this bug:

Author: mckusick
Date: Mon Aug  7 19:18:28 UTC 2017
New revision: 322178
URL: https://svnweb.freebsd.org/changeset/base/322178

Log:
  sysctl kern.geom.journal.cache.limit shows negative value for FreeBSD/amd64
  system having over 4GB RAM. That's due to:

  1) the limit being u_int instead of u_long like vm.kmem_size (the limit is
     half of vm.kmem_size by default for amd64);
  2) sysctl handler g_journal_cache_limit_sysctl() using u_int instead of
u_long.

  The fix is to replace u_int with u_long for the kern.geom.journal.cache.limit
  sysctl variable.

  PR: 198500
  Submitted by: Dr. Andreas Longwitz <longwitz at incore.de>
  Reported by: Eugene Grosbein
  Discussed with: kib
  MFC after: 1 week

Changes:
  head/sys/geom/journal/g_journal.c

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