linux-kernel - Re: [PATCH v2 0/2] locking: Fix racy reads of owner->on

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Message-ID: <7961d0f7-d1e4-d631-5806-58607e50279d@redhat.com>
Date:   Fri, 3 Dec 2021 10:49:17 -0500
From:   Waiman Long <longman@...hat.com>
To:     Kefeng Wang <wangkefeng.wang@...wei.com>,
        Peter Zijlstra <peterz@...radead.org>
Cc:     Ingo Molnar <mingo@...hat.com>, Will Deacon <will@...nel.org>,
        Boqun Feng <boqun.feng@...il.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Mark Rutland <mark.rutland@....com>,
        "Paul E. McKenney" <paulmck@...nel.org>,
        linux-kernel@...r.kernel.org, kasan-dev@...glegroups.com
Subject: Re: [PATCH v2 0/2] locking: Fix racy reads of owner->on_cpu

On 12/3/21 02:59, Kefeng Wang wrote:
> v2:
> - adding owner_on_cpu() refactor, shared by mutex/rtmutex/rwsem
>
> v1: https://lore.kernel.org/all/20211202101238.33546-1-elver@google.com/
>
> Kefeng Wang (1):
>    locking: Make owner_on_cpu() into <linux/sched.h>
>
> Marco Elver (1):
>    locking: Mark racy reads of owner->on_cpu
>
>   include/linux/sched.h    |  9 +++++++++
>   kernel/locking/mutex.c   | 11 ++---------
>   kernel/locking/rtmutex.c |  5 ++---
>   kernel/locking/rwsem.c   |  9 ---------
>   4 files changed, 13 insertions(+), 21 deletions(-)
>
LGTM

Acked-by: Waiman Long <longman@...hat.com>