linux-kernel - Re: [GIT PULL] locking changes for v4.4

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Message-ID: <CA+55aFzkn4-s5r2Wpkm_rKz5cAZXWjRoK_+EL9hC32ZTourmtw@mail.gmail.com>
Date:	Tue, 3 Nov 2015 15:58:54 -0800
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Ingo Molnar <mingo@...nel.org>
Cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Thomas Gleixner <tglx@...utronix.de>,
	"Paul E. McKenney" <paulmck@...ibm.com>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [GIT PULL] locking changes for v4.4

On Tue, Nov 3, 2015 at 3:54 PM, Linus Torvalds
<torvalds@...ux-foundation.org> wrote:
> On Tue, Nov 3, 2015 at 1:16 AM, Ingo Molnar <mingo@...nel.org> wrote:
>>
>>   - More gradual enhancements to atomic ops: new atomic*_read_ctrl() ops,
>>     synchronize atomic_{read,set}() ordering requirements between architectures,
>>     add atomic_long_t bitops. (Peter Zijlstra)
>
> From another thread: those new "atomic*_read_ctrl()" operations are
> complete voodoo programming, and should never ever be used.

Sadly, that commit seems to be in the middle of the series.

I think I'll pull this, but then just make a separate commit to remove
all the bogus games with "control" dependencies that seem to have no
basis is reality.

                 Linus
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