Signed-off-by: Philippe Gerum <rpm@xenomai.org>

Signed-off-by: Philippe Gerum <rpm@xenomai.org>

Signed-off-by: Philippe Gerum <rpm@xenomai.org>

Sending pollable signals is most likely done from a context which
cannot immediately reschedule, but will certainly do so later on
(e.g. IRQ handler). There is no point in triggering a reschedule in
this overwhelmingly frequent case.

Rare callers which might want to reschedule immediately after the
events are posted must do so by calling evl_schedule() explicitly
(none in tree yet).

Signed-off-by: Philippe Gerum <rpm@xenomai.org>

Signed-off-by: Philippe Gerum <rpm@xenomai.org>

Signed-off-by: Philippe Gerum <rpm@xenomai.org>

Signed-off-by: Philippe Gerum <rpm@xenomai.org>

Signed-off-by: Philippe Gerum <rpm@xenomai.org>

Signed-off-by: Philippe Gerum <rpm@xenomai.org>

Signed-off-by: Philippe Gerum <rpm@xenomai.org>

Signed-off-by: Philippe Gerum <rpm@xenomai.org>

Signed-off-by: Philippe Gerum <rpm@xenomai.org>

Signed-off-by: Philippe Gerum <rpm@xenomai.org>

Signed-off-by: Philippe Gerum <rpm@xenomai.org>

It is important to have the kernel build properly when EVL is disabled
in Kconfig, and we want to reduce the noise in the mainline code
involved in setting up the out-of-band file context without
systematically resorting to inlined #ifdefery.

Provide a couple of placeholders to enable this for CONFIG_EVL is off.

Signed-off-by: Philippe Gerum <rpm@xenomai.org>

Signed-off-by: Philippe Gerum <rpm@xenomai.org>

We can reduce the noise due to adding EVL bits to upstream drivers by
allowing them to be associated with in-line Kconfig conditional, e.g.

	 if (IS_ENABLED(CONFIG_EVL))
	       evl_open_file(...);

will still build if CONFIG_EVL is off as the dummy call is resolved in
the statement.

Signed-off-by: Philippe Gerum <rpm@xenomai.org>

Signed-off-by: Philippe Gerum <rpm@xenomai.org>

Once the completion is signaled, a joiner might free the (k)thread
descriptor memory. Make sure we don't refer to this descriptor after
this point.

Signed-off-by: Philippe Gerum <rpm@xenomai.org>

Waiting for the next RCU quiet period is not a reliable way to ensure
the joiner won't resume too early before the joinee is fully
dismantled in thread_factory_dispose(), which may lead to random UMR
with kthreads (e.g. hectic freeing the task descriptor array before
thread_factory_dispose() has run).

Rework the mechanism to postpone the completion signal until
thread_factory_dispose() is called, which solves the original problem
in a much simpler and reliable way.

Signed-off-by: Philippe Gerum <rpm@xenomai.org>

Signed-off-by: Philippe Gerum <rpm@xenomai.org>

Signed-off-by: Philippe Gerum <rpm@xenomai.org>

Signed-off-by: Philippe Gerum <rpm@xenomai.org>

We may collect negative delta values when sampling latency on fast
machines, make sure the delta sum which is used in calculating the
average is signed, to prevent weird results.

Signed-off-by: Philippe Gerum <rpm@xenomai.org>

Signed-off-by: Philippe Gerum <rpm@xenomai.org>

Signed-off-by: Philippe Gerum <rpm@xenomai.org>

Signed-off-by: Philippe Gerum <rpm@xenomai.org>

Signed-off-by: Philippe Gerum <rpm@xenomai.org>

The only sane way to issue a request for switching OOB via
evl_switch_oob() is through oob_ioctl(), not ioctl(). Once the switch
is done, the .unlocked_ioctl() operation would unwind into the VFS on
the out-of-band stage, which would certainly be a bad idea.

To reflect this, process EVL_THRIOC_SWITCH_OOB from oob_ioctl()
exclusively.

Signed-off-by: Philippe Gerum <rpm@xenomai.org>

Make sure breakage and/or WARN_ON() in the in-band transition code we
use for fixing up a trap on the oob stage cannot cause
handle_oob_trap() to be called recursively, leading to a stack
overflow eventually.

Signed-off-by: Philippe Gerum <rpm@xenomai.org>

Signed-off-by: Philippe Gerum <rpm@xenomai.org>

Visible from class/evl/control/tp.

Signed-off-by: Philippe Gerum <rpm@xenomai.org>

Signed-off-by: Philippe Gerum <rpm@xenomai.org>

Signed-off-by: Philippe Gerum <rpm@xenomai.org>

Signed-off-by: Philippe Gerum <rpm@xenomai.org>

Signed-off-by: Philippe Gerum <rpm@xenomai.org>

Signed-off-by: Philippe Gerum <rpm@xenomai.org>

Signed-off-by: Philippe Gerum <rpm@xenomai.org>

Signed-off-by: Philippe Gerum <rpm@xenomai.org>

SWITCH_INBAND, SWITCH_OOB, SET_MODE and CLEAR_MODE requests only apply
to the caller and are mode-sensitive. Enforce these rules.

Signed-off-by: Philippe Gerum <rpm@xenomai.org>