sched/idle: Use hrtimer cleanup class in play_idle_precise()

Pair on-stack setup with destruction using the hrtimer_on_stack cleanup
class in play_idle_precise().

Keep the cleanup object's scope around timer start and the idle wait. Start
the timer in pinned hard mode, so its callback runs as a hardirq on the
current CPU. The interrupted task observes it.done only after the callback
returns. Since the callback returns HRTIMER_NORESTART, the timer is not
requeued before the cleanup object tears down its on-stack debug object.

Fixes: c1de45ca831a ("sched/idle: Add support for tasks that inject idle")
Signed-off-by: Hui Su <sh_def@163.com>
Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Link: https://patch.msgid.link/eccd97b2003a16291817974798cbe98b25b582a0.1792083743.git.sh_def@163.com

0 files changed, 0 insertions, 0 deletions