linux-kernel - [PATCH 0/4] irq_work: Fix ordering issue

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Date:   Fri,  8 Nov 2019 17:08:54 +0100
From:   Frederic Weisbecker <frederic@...nel.org>
To:     Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...nel.org>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        Frederic Weisbecker <frederic@...nel.org>,
        "Paul E . McKenney" <paulmck@...ux.vnet.ibm.com>,
        Thomas Gleixner <tglx@...utronix.de>
Subject: [PATCH 0/4] irq_work: Fix ordering issue

Patches 1 and 2 are the fix part, 3 is a cleanup, 4 is
extra-optimization (rfc).

Thanks to Paul that confirmed my doubts about ordering on cmpxchg() failure.

Frederic Weisbecker (4):
  irq_work: Convert flags to atomic_t
  irq_work: Fix irq_work_claim() ordering
  irq_work: Slightly simplify IRQ_WORK_PENDING clearing
  irq_work: Weaken ordering in irq_work_run_list()

 include/linux/irq_work.h | 10 +++++++---
 kernel/irq_work.c        | 35 ++++++++++++++---------------------
 kernel/printk/printk.c   |  2 +-
 3 files changed, 22 insertions(+), 25 deletions(-)

-- 
2.23.0