From: Davidlohr Bueso <dave@stgolabs.net>
To: Peter Zijlstra <peterz@infradead.org>
Cc: Ingo Molnar <mingo@kernel.org>,
"Paul E. McKenney" <paulmck@linux.vnet.ibm.com>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 2/8] locking/mutex: Get rid of use_ww_cxt param in common paths
Date: Sun, 28 Dec 2014 10:12:57 -0800 [thread overview]
Message-ID: <1419790377.8667.6.camel@stgolabs.net> (raw)
In-Reply-To: <20141228162303.GA12952@dyad.arnhem.chello.nl>
On Sun, 2014-12-28 at 17:23 +0100, Peter Zijlstra wrote:
> On Sun, Dec 28, 2014 at 01:11:17AM -0800, Davidlohr Bueso wrote:
> > ... and simplify a bit the parameters of __mutex_lock_common(). This
> > is straightforward as we can just check if the ww cxt for NULL if passed
> > from non wait/wound paths.
>
>
> The reason for this trainwreck is because of some older GCC not actually doing
> the const propagation of the MULL pointer right.
That's a shame, I really detest all this ww mess.
next prev parent reply other threads:[~2014-12-28 18:13 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-12-28 9:11 [PATCH 0/8] locking: Various updates Davidlohr Bueso
2014-12-28 9:11 ` [PATCH 1/8] Documentation/memory-barriers.txt: Fix smp typo Davidlohr Bueso
2014-12-31 2:02 ` Paul E. McKenney
2014-12-28 9:11 ` [PATCH 2/8] locking/mutex: Get rid of use_ww_cxt param in common paths Davidlohr Bueso
2014-12-28 16:23 ` Peter Zijlstra
2014-12-28 18:12 ` Davidlohr Bueso [this message]
2014-12-28 9:11 ` [PATCH 3/8] locking/mutex: Checking the stamp is ww only Davidlohr Bueso
2014-12-28 9:11 ` [PATCH 4/8] locking/mutex: Delete useless comment Davidlohr Bueso
2014-12-28 9:11 ` [PATCH 5/8] locking/mutex: Introduce ww_mutex_set_context_slowpath Davidlohr Bueso
2014-12-28 9:11 ` [PATCH 6/8] locking/mcs: Better differentiate between mcs variants Davidlohr Bueso
2015-01-14 14:13 ` Ingo Molnar
2015-01-14 15:55 ` Davidlohr Bueso
2015-01-14 14:16 ` Ingo Molnar
2014-12-28 9:11 ` [PATCH 7/8] locking: Use [READ,ASSIGN]_ONCE() for non-scalar types Davidlohr Bueso
2014-12-28 16:30 ` Peter Zijlstra
2014-12-28 9:11 ` [PATCH 8/8] locking/osq: No need for load/acquire when acquire-polling Davidlohr Bueso
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