Date: Wed, 21 Dec 2005 15:54:13 -0500 (EST)
From: Nicolas Pitre <nico@cam.org>
Subject: Re: [patch 3/8] mutex subsystem, add atomic_*_call_if_*() to i386
In-reply-to: <20051221203243.GA19082@nevyn.them.org>
To: Daniel Jacobowitz <dan@debian.org>
Cc: Linus Torvalds <torvalds@osdl.org>, Ingo Molnar <mingo@elte.hu>,
       lkml <linux-kernel@vger.kernel.org>, Andrew Morton <akpm@osdl.org>,
       Arjan van de Ven <arjanv@infradead.org>,
       Jes Sorensen <jes@trained-monkey.org>,
       Zwane Mwaikambo <zwane@arm.linux.org.uk>,
       Oleg Nesterov <oleg@tv-sign.ru>, David Howells <dhowells@redhat.com>,
       Alan Cox <alan@lxorguk.ukuu.org.uk>, Benjamin LaHaise <bcrl@kvack.org>,
       Steven Rostedt <rostedt@goodmis.org>,
       Christoph Hellwig <hch@infradead.org>, Andi Kleen <ak@suse.de>,
       Russell King <rmk+lkml@arm.linux.org.uk>
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On Wed, 21 Dec 2005, Daniel Jacobowitz wrote:

> This new macro is only going to be used in x86-specific files, right? 
> There's no practical way to implement this on lots of other
> architectures.

The default implementation does the call in C.

> Embedding a call in asm("") can break other things too - for instance,
> unwind tables could become inaccurate.

I doubt unwind tables are used at all for the kernel, are they?


Nicolas
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