[Bug 193299] New: [valgrind] doesn't recognise the netmap ioctls

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=193299

            Bug ID: 193299
           Summary: [valgrind] doesn't recognise the netmap ioctls
           Product: Ports Tree
           Version: Latest
          Hardware: Any
                OS: Any
            Status: Needs Triage
          Severity: Affects Only Me
          Priority: ---
         Component: Individual Port(s)
          Assignee: freebsd-ports-bugs at FreeBSD.org
          Reporter: adrian at freebsd.org

Valgrind doesn't currently recognise the netmap ioctls.

Eg:

libnet injecting on interface: igb2
==20420== Warning: noted but unhandled ioctl 0x20006995 with no size/direction
hints   This could cause spurious value errors to appear.   See
README_MISSING_SYSCALL_OR_IOCTL for guidance on writing a proper
wrapper.Syscall param ioctl(generic) points to uninitialised byte(s)

that's ioctl 149, for:

netmap.h:#define NIOCRXSYNC     _IO('i', 149) /* sync rx queues */

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