linux-kernel - RE: [PATCH tip/core/rcu 02/19] rcu: Defer reporting RCU-preempt quiescent states when disabled

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Date:   Mon, 26 Nov 2018 13:55:37 +0000
From:   Ran Rozenstein <ranro@...lanox.com>
To:     "paulmck@...ux.ibm.com" <paulmck@...ux.ibm.com>,
        Joel Fernandes <joel@...lfernandes.org>
CC:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "mingo@...nel.org" <mingo@...nel.org>,
        "jiangshanlai@...il.com" <jiangshanlai@...il.com>,
        "dipankar@...ibm.com" <dipankar@...ibm.com>,
        "akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
        "mathieu.desnoyers@...icios.com" <mathieu.desnoyers@...icios.com>,
        "josh@...htriplett.org" <josh@...htriplett.org>,
        "tglx@...utronix.de" <tglx@...utronix.de>,
        "peterz@...radead.org" <peterz@...radead.org>,
        "rostedt@...dmis.org" <rostedt@...dmis.org>,
        "dhowells@...hat.com" <dhowells@...hat.com>,
        "edumazet@...gle.com" <edumazet@...gle.com>,
        "fweisbec@...il.com" <fweisbec@...il.com>,
        "oleg@...hat.com" <oleg@...hat.com>,
        Maor Gottlieb <maorg@...lanox.com>,
        Tariq Toukan <tariqt@...lanox.com>,
        Eran Ben Elisha <eranbe@...lanox.com>,
        Leon Romanovsky <leonro@...lanox.com>
Subject: RE: [PATCH tip/core/rcu 02/19] rcu: Defer reporting RCU-preempt
 quiescent states when disabled

> 
> Hearing no objections, here is the updated patch.
> 
> 								Thanx, Paul
> 
> ------------------------------------------------------------------------
> 
> commit 970cab5d3d206029ed27274a98ea1c3d7e780e53
> Author: Paul E. McKenney <paulmck@...ux.ibm.com>
> Date:   Mon Oct 29 07:36:50 2018 -0700
> 
>     rcu: Avoid signed integer overflow in rcu_preempt_deferred_qs()
> 
>     Subtracting INT_MIN can be interpreted as unconditional signed integer
>     overflow, which according to the C standard is undefined behavior.
>     Therefore, kernel build arguments notwithstanding, it would be good to
>     future-proof the code.  This commit therefore substitutes INT_MAX for
>     INT_MIN in order to avoid undefined behavior.
> 
>     While in the neighborhood, this commit also creates some meaningful
> names
>     for INT_MAX and friends in order to improve readability, as suggested
>     by Joel Fernandes.
> 
>     Reported-by: Ran Rozenstein <ranro@...lanox.com>
>     Signed-off-by: Paul E. McKenney <paulmck@...ux.ibm.com>
> 
>     squash! rcu: Avoid signed integer overflow in rcu_preempt_deferred_qs()
> 
>     While in the neighborhood, use macros to give meaningful names.
> 
>     Signed-off-by: Paul E. McKenney <paulmck@...ux.ibm.com>
> 


Hi,

What is the acceptance status of this patch?

Thanks,
Ran