linux-kernel - Re: [PATCH 8/8] Convert PDA into the percpu section

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Message-ID: <45EDB506.70709@goop.org>
Date:	Tue, 06 Mar 2007 10:37:58 -0800
From:	Jeremy Fitzhardinge <jeremy@...p.org>
To:	Andi Kleen <ak@...e.de>
CC:	Rusty Russell <rusty@...tcorp.com.au>,
	lkml - Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Zachary Amsden <zach@...are.com>,
	Jeremy Fitzhardinge <jeremy@...source.com>,
	Ingo Molnar <mingo@...e.hu>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH 8/8] Convert PDA into the percpu section

Andi Kleen wrote:
> Sigh -- i had hoped this had settled down because it was a
> merging nightmare last time. Ok. 
>
>   
>> +#define percpu_to_op(op,var,val)				\
>> +	do {							\
>> +		typedef typeof(var) T__;			\
>> +		if (0) { T__ tmp__; tmp__ = (val); }		\
>> +		switch (sizeof(var)) {				\
>> +		case 1:						\
>> +			asm(op "b %1,"__percpu_seg"%0"		\
>> +			    : "+m" (var)			\
>> +			    :"ri" ((T__)val));			\
>>     
>
> Perhaps I'm blind but I can't see where the %fs reference is there.
>   
__percpu_seg.  It's defined to nothing in the UP case.

    J
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