linux-kernel - Re: alpha: half done futex implementation

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Date:	Tue, 14 Apr 2009 11:45:04 +0200
From:	Segher Boessenkool <segher@...nel.crashing.org>
To:	Segher Boessenkool <segher@...nel.crashing.org>
Cc:	Richard Henderson <rth@...ddle.net>,
	Oliver Falk <oliver@...ux-kernel.at>,
	linux-kernel@...r.kernel.org, linuxppc-dev@...abs.org,
	Ivan Kokshaysky <ink@...assic.park.msu.ru>,
	linux-alpha@...r.kernel.org, Matt Turner <mattst88@...il.com>,
	Jay Estabrook <jay.estabrook@...com>
Subject: Re: alpha: half done futex implementation

> 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

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