Philippe Gerum authored Feb 20, 2021 and Jan Kiszka committed Mar 08, 2021

Dovetail interposes on the in-band syscall entry, passing the request
on to Cobalt via different handlers depending on the calling context:

- via handle_oob_syscall() when the current thread is running
  out-of-band, and the request is not an in-band (i.e. regular Linux)
  system call, therefore shall be handled by Xenomai. This is the fast
  path.

- via handle_pipelined_syscall() in all other cases, e.g. when current
  is running in-band, and/or the system call shall be handled by the
  in-band kernel eventually (useful for relaxing the current thread in
  the process if out-of-band on entry).

Signed-off-by: Philippe Gerum <rpm@xenomai.org>
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>