linux-kernel - Re: [PATCH RFC tip/core/rcu 12/15] lib/assoc_array: Remove smp_read_barrier

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Date:   Tue, 10 Oct 2017 17:54:51 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
Cc:     David Howells <dhowells@...hat.com>, linux-kernel@...r.kernel.org,
        mingo@...nel.org, torvalds@...ux-foundation.org,
        mark.rutland@....com, linux-arch@...r.kernel.org,
        will.deacon@....com, Jonathan Corbet <corbet@....net>,
        Alexander Kuleshov <kuleshovmail@...il.com>
Subject: Re: [PATCH RFC tip/core/rcu 12/15] lib/assoc_array: Remove
 smp_read_barrier_depends()

On Tue, Oct 10, 2017 at 08:50:42AM -0700, Paul E. McKenney wrote:
> +			/* We need a barrier between the read of the pointer,
> +			 * which is supplied by the above READ_ONCE().
>  			 */

>  			/* We need a barrier between the read of the pointer
>  			 * and dereferencing the pointer - but only if we are
>  			 * actually going to dereference it.
>  			 */

Could you also fix those "disgusting drug-induced crap" comment styles
while you're there anyway?

  http://lkml.iu.edu/hypermail/linux/kernel/1607.1/00627.html