Re: [PATCH] spinlock: Get rid of spin_can_lock()

From	Davidlohr Bueso <dave@stgolabs.net>
Newsgroups	linux.kernel
Subject	Re: [PATCH] spinlock: Get rid of spin_can_lock()
Date	2016-06-06 19:30 +0200
Message-ID	<rH6vD-7U4-9@gated-at.bofh.it> (permalink)
References	<rBYyK-6yX-25@gated-at.bofh.it> <rFdKW-8sS-1@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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On Wed, 01 Jun 2016, Peter Zijlstra wrote:

>On Mon, May 23, 2016 at 06:54:02AM -0700, Davidlohr Bueso wrote:
>> ... it has no users and we already have the the regular spin_is_lock()
>> call anyway -- although iirc this was going to be different
>> than the simple negation for lock elision implementations. Lets drop it.
>
>What about {read,write}_can_lock() ? those look equally unused and
>borken.

Hmm so the break_lock thingie for archs that don't have ticket locks (or
queued obviously) want to use these, mainly for is_contended() usage afaict.

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Re: [PATCH] spinlock: Get rid of spin_can_lock() Peter Zijlstra <peterz@infradead.org> - 2016-06-01 14:50 +0200
  Re: [PATCH] spinlock: Get rid of spin_can_lock() Davidlohr Bueso <dave@stgolabs.net> - 2016-06-06 19:30 +0200

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