linux-kernel - Re: [PATCH tip/core/rcu 08/21] tools/memory-model: Add support for synchronize_srcu

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Message-ID: <20190402144911.GA10044@andrea>
Date:   Tue, 2 Apr 2019 16:49:11 +0200
From:   Andrea Parri <andrea.parri@...rulasolutions.com>
To:     "Paul E. McKenney" <paulmck@...ux.ibm.com>
Cc:     linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org,
        mingo@...nel.org, stern@...land.harvard.edu, will.deacon@....com,
        peterz@...radead.org, boqun.feng@...il.com, npiggin@...il.com,
        dhowells@...hat.com, j.alglave@....ac.uk, luc.maranget@...ia.fr,
        akiyks@...il.com
Subject: Re: [PATCH tip/core/rcu 08/21] tools/memory-model: Add support for
 synchronize_srcu_expedited()

On Tue, Mar 26, 2019 at 04:41:20PM -0700, Paul E. McKenney wrote:
> Given that synchronize_rcu_expedited() is supported, this commit adds
> support for synchronize_srcu_expedited().
> 
> Signed-off-by: Paul E. McKenney <paulmck@...ux.ibm.com>
> ---
>  tools/memory-model/linux-kernel.def | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/tools/memory-model/linux-kernel.def b/tools/memory-model/linux-kernel.def
> index 0c3f0ef486f4..551eeaa389d4 100644
> --- a/tools/memory-model/linux-kernel.def
> +++ b/tools/memory-model/linux-kernel.def
> @@ -51,6 +51,7 @@ synchronize_rcu_expedited() { __fence{sync-rcu}; }
>  srcu_read_lock(X)  __srcu{srcu-lock}(X)
>  srcu_read_unlock(X,Y) { __srcu{srcu-unlock}(X,Y); }
>  synchronize_srcu(X)  { __srcu{sync-srcu}(X); }
> +synchronize_srcu_expedited(X)  { __srcu{sync-srcu}(X); }

This and the other patches from the series do not apply to "tip/core/rcu"
(from the Subject), but this seems straightforward enough:

Acked-by: Andrea Parri <andrea.parri@...rulasolutions.com>

  Andrea


>  
>  // Atomic
>  atomic_read(X) READ_ONCE(*X)
> -- 
> 2.17.1
>