commit e3c30795823672eec9bde75187e184f23ed98d70
author Volker Rümelin <vr_qemu@t-online.de> Fri Jun 04 20:01:20 2021 +0200
committer Kevin O'Connor <kevin@koconnor.net> Wed Jun 09 11:05:19 2021 -0400
tree 6e07dcd386083cef608f629a5070a61c40503803
parent f501bcbeef616c40125889b657f7ff42eeec8a8d

stacks: call check_irqs() after switch_next()

In function run_thread() the function check_irqs() gets called
after the thread switch for atomic handoff reasons. In yield()
it's the other way round.

If check_irqs() is called after run_thread() and check_irqs()
is called before switch_next() in yield(), it can happen in a
constructed case that a background thread runs twice without
a check_irqs() call in between. Call check_irqs() after
switch_next() in yield() to prevent this.

Signed-off-by: Volker Rümelin <vr_qemu@t-online.de>