Re: [PATCH RFC tip/core/rcu 12/15] lib/assoc_array: Remove smp_read_barrier_depends()

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To: "Paul E. McKenney" <paulmck@xxxxxxxxxxxxxxxxxx>
Subject: Re: [PATCH RFC tip/core/rcu 12/15] lib/assoc_array: Remove smp_read_barrier_depends()
From: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Date: Wed, 11 Oct 2017 18:54:05 +0200
Cc: David Howells <dhowells@xxxxxxxxxx>, Will Deacon <will.deacon@xxxxxxx>, linux-kernel@xxxxxxxxxxxxxxx, mingo@xxxxxxxxxx, torvalds@xxxxxxxxxxxxxxxxxxxx, mark.rutland@xxxxxxx, linux-arch@xxxxxxxxxxxxxxx, Jonathan Corbet <corbet@xxxxxxx>, Alexander Kuleshov <kuleshovmail@xxxxxxxxx>, dvyukov@xxxxxxxxxx
In-reply-to: <20171011164748.GK3521@linux.vnet.ibm.com>
References: <20171010155042.GD3521@linux.vnet.ibm.com> <1507594969-8347-12-git-send-email-paulmck@linux.vnet.ibm.com> <20171010001951.GA6476@linux.vnet.ibm.com> <8079.1507628146@warthog.procyon.org.uk> <26455.1507724399@warthog.procyon.org.uk> <6309.1507735045@warthog.procyon.org.uk> <20171011155948.GE3521@linux.vnet.ibm.com> <20171011161220.zqkdhynxerrcmvdd@hirez.programming.kicks-ass.net> <20171011162412.o6lmjiag7spwabge@hirez.programming.kicks-ass.net> <20171011164748.GK3521@linux.vnet.ibm.com>
User-agent: NeoMutt/20170609 (1.8.3)

On Wed, Oct 11, 2017 at 09:47:48AM -0700, Paul E. McKenney wrote:
> Interesting.  Do we currently have any dependencies headed by
> this_cpu_read()?

Nope, but almost, look for: cpufreq_update_util_data.

Follow-Ups:
- Re: [PATCH RFC tip/core/rcu 12/15] lib/assoc_array: Remove smp_read_barrier_depends()
  - From: Paul E. McKenney

References:
- Re: [PATCH RFC tip/core/rcu 12/15] lib/assoc_array: Remove smp_read_barrier_depends()
  - From: Paul E. McKenney
- [PATCH RFC tip/core/rcu 12/15] lib/assoc_array: Remove smp_read_barrier_depends()
  - From: Paul E. McKenney
- [PATCH RFC tip/core/rcu 0/15] Remove to-be-unneeded smp_read_barrier_depends()
  - From: Paul E. McKenney
- Re: [PATCH RFC tip/core/rcu 12/15] lib/assoc_array: Remove smp_read_barrier_depends()
  - From: David Howells
- Re: [PATCH RFC tip/core/rcu 12/15] lib/assoc_array: Remove smp_read_barrier_depends()
  - From: David Howells
- Re: [PATCH RFC tip/core/rcu 12/15] lib/assoc_array: Remove smp_read_barrier_depends()
  - From: David Howells
- Re: [PATCH RFC tip/core/rcu 12/15] lib/assoc_array: Remove smp_read_barrier_depends()
  - From: Paul E. McKenney
- Re: [PATCH RFC tip/core/rcu 12/15] lib/assoc_array: Remove smp_read_barrier_depends()
  - From: Peter Zijlstra
- Re: [PATCH RFC tip/core/rcu 12/15] lib/assoc_array: Remove smp_read_barrier_depends()
  - From: Peter Zijlstra
- Re: [PATCH RFC tip/core/rcu 12/15] lib/assoc_array: Remove smp_read_barrier_depends()
  - From: Paul E. McKenney

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