linux-kernel - Re: cli/sti vs local_cmpxchg and local_add

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Message-Id: <20090317.122816.246078801.davem@davemloft.net>
Date:	Tue, 17 Mar 2009 12:28:16 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	mathieu.desnoyers@...ymtl.ca
Cc:	paulmck@...ux.vnet.ibm.com, mingo@...e.hu,
	jwboyer@...ux.vnet.ibm.com, linux-kernel@...r.kernel.org,
	ltt-dev@...ts.casi.polymtl.ca
Subject: Re: cli/sti vs local_cmpxchg and local_add_return

From: Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca>
Date: Tue, 17 Mar 2009 12:06:35 -0400

> But powerpc has non-maskable interrupts, so for less than 4 cycles, I
> think it's better to stay with the local_t variant to be NMI-safe.

Sparc64 has non-maskable interrupts too btw.
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