linux-kernel - Re: [PATCH 31/48] uv: Replace __get_cpu

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Date:	Tue, 04 Mar 2014 16:18:21 -0800
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Andrew Morton <akpm@...ux-foundation.org>,
	Christoph Lameter <cl@...ux.com>
CC:	Tejun Heo <tj@...nel.org>, akpm@...uxfoundation.org,
	rostedt@...dmis.org, linux-kernel@...r.kernel.org,
	Ingo Molnar <mingo@...nel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Hedi Berriche <hedi@....com>, Mike Travis <travis@....com>,
	Dimitri Sivanich <sivanich@....com>
Subject: Re: [PATCH 31/48] uv: Replace __get_cpu_var

On 03/04/2014 03:02 PM, Andrew Morton wrote:
> On Fri, 14 Feb 2014 14:19:12 -0600 Christoph Lameter <cl@...ux.com> wrote:
> 
>> Use __this_cpu_read instead.
>>
>>
>> --- linux.orig/arch/x86/include/asm/uv/uv_hub.h	2014-02-03 14:16:53.987889372 -0600
>> +++ linux/arch/x86/include/asm/uv/uv_hub.h	2014-02-03 14:16:53.987889372 -0600
>> @@ -618,7 +618,7 @@
>>  };
>>  
>>  DECLARE_PER_CPU(struct uv_cpu_nmi_s, __uv_cpu_nmi);
>> -#define uv_cpu_nmi			(__get_cpu_var(__uv_cpu_nmi))
>> +#define uv_cpu_nmi			__this_cpu_read(_uv_cpu_nmi)
> 
> arch/x86/platform/uv/uv_nmi.c: In function 'uv_check_nmi':
> arch/x86/platform/uv/uv_nmi.c:218: error: '_uv_cpu_nmi' undeclared (first use in this function)
> arch/x86/platform/uv/uv_nmi.c:218: error: (Each undeclared identifier is reported only once
> arch/x86/platform/uv/uv_nmi.c:218: error: for each function it appears in.)
> 
> 
> This?
> 

More likely just add the missing second underscore.

	-hpa

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