This flag, when set, will be used to indicate that the task must die.
At the moment this may only be placed by the task itself or by the
scheduler when placing it into the TL_NORMAL queue.
It is neither convenient nor scalable to check each and every tasklet
queue to figure whether it's empty or not while we often need to check
them all at once. This patch introduces a tasklet class mask which gets
a bit 1 set for each queue representing one class of service. A single
test on the mask allows to figure whether there's still some work to be
done. It will later be usable to better factor the runqueue code.
Bits are set when tasklets are queued. They're cleared when queues are
emptied. It is possible that a queue is empty but has a bit if a tasklet
was added then removed, but this is not a problem as this is properly
checked for in run_tasks_from_list().
It will be convenient to have the tasklet queue number soon, better make
current_queue an index rather than a pointer to the queue. When not currently
running (e.g. from I/O), the index is -1.
In task_per_thread[] we now have current_queue which is a pointer to
the current tasklet_list entry being evaluated. This will be used to
know the class under which the current task/tasklet is currently
running.
There are list definitions everywhere in the code, let's drop the need
for including list-t.h to declare them. The rest of the list manipulation
is huge however and not needed everywhere so using the list walking macros
still requires to include list.h.
This patch fixes all the leftovers from the include cleanup campaign. There
were not that many (~400 entries in ~150 files) but it was definitely worth
doing it as it revealed a few duplicates.
The TASK_IS_TASKLET() macro was moved to the proto file instead of the
type one. The proto part was a bit reordered to remove a number of ugly
forward declaration of static inline functions. About a tens of C and H
files had their dependency dropped since they were not using anything
from task.h.
