[Bug 230993] sysutils/acpi_call: Kernel panic since CURRENT r336876 (Use SMAP on amd64)

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=230993

            Bug ID: 230993
           Summary: sysutils/acpi_call: Kernel panic since CURRENT r336876
                    (Use SMAP on amd64)
           Product: Ports & Packages
           Version: Latest
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: Individual Port(s)
          Assignee: ports-bugs at FreeBSD.org
          Reporter: theron.tarigo at gmail.com
                CC: gelraen.ua at gmail.com
             Flags: maintainer-feedback?(gelraen.ua at gmail.com)
                CC: gelraen.ua at gmail.com
 Attachment #196667 text/plain
         mime type:

Created attachment 196667
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=196667&action=edit
Fix

Using acpi_call on CURRENT since r336876 causes a kernel panic on some
hardware.  Investigating the problem reveals an attempt to use a userspace
pointer from within the kernel module (passed to the acpi_call_fixup_pointers
routine).  This evidently is no longer allowed under use of Supervisor Mode
Access Protection.

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