linux-kernel - [GIT PULL] lockdep: Add lightweight IRQs disabled/enabled check v2

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Message-Id: <1509980490-4285-1-git-send-email-frederic@kernel.org>
Date:   Mon,  6 Nov 2017 16:01:16 +0100
From:   Frederic Weisbecker <frederic@...nel.org>
To:     Ingo Molnar <mingo@...nel.org>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        Frederic Weisbecker <frederic@...nel.org>,
        Tejun Heo <tj@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        "David S . Miller" <davem@...emloft.net>,
        Lai Jiangshan <jiangshanlai@...il.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        "Paul E . McKenney" <paulmck@...ux.vnet.ibm.com>
Subject: [GIT PULL] lockdep: Add lightweight IRQs disabled/enabled check v2

Ingo,

Please pull the lockdep/irq-v2 branch that can be found at:

git://git.kernel.org/pub/scm/linux/kernel/git/frederic/linux-dynticks.git
	lockdep/irq-v2

HEAD: c741fbe70afb0e488f4356456e6397d205f115ce

--
Changes on v2:

* Fix spurious warnings when lockdep is temporarily disabled, like NTFS
  does while mounting superblock (reported by Wu Fengguang).

* Remove the IRQ flags auto-correction which doesn't make anymore sense
  now that the assertion is config-dependent. (Suggested by Peter Zijlstra).

--

Summary:

Checking whether IRQs are disabled or enabled is often an important
sanity check. Now we can be sometimes reluctant to have it on fastpath
because reading the flags can be somewhat costly.

As suggested by Peter Zijlstra some time ago, this would be a nice
lockdep extension: it's the natural concurrency sanity checker and it
already tracks down the irqflags state.


Thanks,
	Frederic
---

Frederic Weisbecker (14):
      lockdep: Add IRQs disabled/enabled assertion
      irq: Use lockdep to assert IRQs are disabled/enabled
      workqueue: Use lockdep to assert IRQs are disabled/enabled
      nohz: Use lockdep to assert IRQs are disabled/enabled
      hrtimer: Use lockdep to assert IRQs are disabled/enabled
      smp: Use lockdep to assert IRQs are disabled/enabled
      x86: Use lockdep to assert IRQs are disabled/enabled
      perf: Use lockdep to assert IRQs are disabled/enabled
      irq/timings: Use lockdep to assert IRQs are disabled/enabled
      irq_work: Use lockdep to assert IRQs are disabled/enabled
      sched: Use lockdep to assert IRQs are disabled/enabled
      posix-cpu-timers: Use lockdep to assert IRQs are disabled/enabled
      netpoll: Use lockdep to assert IRQs are disabled/enabled
      rcu: Use lockdep to assert IRQs are disabled/enabled


 arch/x86/entry/common.c        |  4 +---
 arch/x86/kernel/smpboot.c      |  2 +-
 include/linux/lockdep.h        | 15 +++++++++++++++
 kernel/events/core.c           | 12 ++++++------
 kernel/irq/timings.c           |  2 +-
 kernel/irq_work.c              |  2 +-
 kernel/rcu/tree.c              | 16 ++++++++--------
 kernel/rcu/tree_plugin.h       | 10 +++++-----
 kernel/sched/clock.c           |  2 +-
 kernel/sched/cputime.c         |  3 +--
 kernel/smp.c                   |  2 +-
 kernel/softirq.c               | 10 +++++-----
 kernel/time/hrtimer.c          |  4 +---
 kernel/time/posix-cpu-timers.c |  6 +++---
 kernel/time/tick-sched.c       |  5 ++---
 kernel/workqueue.c             |  2 +-
 net/core/netpoll.c             |  2 +-
 17 files changed, 54 insertions(+), 45 deletions(-)