From: Segher Boessenkool <segher@kernel.crashing.org>
To: Segher Boessenkool <segher@kernel.crashing.org>
Cc: Oliver Falk <oliver@linux-kernel.at>,
linux-kernel@vger.kernel.org, linuxppc-dev@ozlabs.org,
Ivan Kokshaysky <ink@jurassic.park.msu.ru>,
linux-alpha@vger.kernel.org, Matt Turner <mattst88@gmail.com>,
Jay Estabrook <jay.estabrook@hp.com>,
Richard Henderson <rth@twiddle.net>
Subject: Re: alpha: half done futex implementation
Date: Tue, 14 Apr 2009 11:45:04 +0200 [thread overview]
Message-ID: <F29CA01F-869A-4C5C-9A3C-4F6B6ABEE901@kernel.crashing.org> (raw)
In-Reply-To: <AE456C27-B568-4835-8843-F2A2E2D8FC32@kernel.crashing.org>
> If either the lwarx or the stwcx. faults, the routine returns -EFAULT
> and doesn't retry (label "3" is the end of the asm).
>
> If the stwcx. fails because the CPU lost the reservation, %1 isn't
> clobbered as far as I see?
Oh, "insn" writes to %1, never mind.
Segher
prev parent reply other threads:[~2009-04-14 9:42 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <b4198de60904111755u5c2078c7xcc689dbd78aeb957@mail.gmail.com>
2009-04-13 20:23 ` alpha: half done futex implementation Richard Henderson
2009-04-13 21:54 ` Andreas Schwab
2009-04-13 22:20 ` Richard Henderson
2009-04-14 9:40 ` Segher Boessenkool
2009-04-14 9:45 ` Segher Boessenkool [this message]
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