linux-kernel - [patch V5 0/3] smp: Make softirq handling RT friendly

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Date:   Wed, 13 Apr 2022 15:31:00 +0200 (CEST)
From:   Thomas Gleixner <tglx@...utronix.de>
To:     LKML <linux-kernel@...r.kernel.org>
Cc:     Christoph Hellwig <hch@...radead.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Subject: [patch V5 0/3] smp: Make softirq handling RT friendly

The invocation of do_softirq() in flush_smp_call_function_from_idle()
breaks on RT because RT does not provide do_softirq().

Aside of that flush_smp_call_function_from_idle() is a misnomer since the
function is invoked not only from idle, but also from the scheduler
migration thread.

The following series addresses this. Changes vs. V4, which can be found
here: https://lore.kernel.org/lkml/20220412203649.956258017@linutronix.de

  - Fix a boatload of missing prototypes warning related to the
    scheduler and its header files.

Thanks,

	tglx
---
 include/linux/interrupt.h    |    9 +++++++++
 include/linux/sched.h        |    2 ++
 kernel/sched/build_policy.c  |    2 ++
 kernel/sched/build_utility.c |    1 +
 kernel/sched/core.c          |    5 ++++-
 kernel/sched/deadline.c      |    2 --
 kernel/sched/fair.c          |    1 +
 kernel/sched/idle.c          |    2 +-
 kernel/sched/sched.h         |    8 ++------
 kernel/sched/smp.h           |    6 ++++++
 kernel/smp.c                 |   32 ++++++++++++++++++++++++--------
 kernel/softirq.c             |   13 +++++++++++++
 kernel/stop_machine.c        |    2 --
 13 files changed, 65 insertions(+), 20 deletions(-)