linux-kernel - Re: [PATCH 5/6] powerpc: Use generic per cpu linux-2.6.git

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Date:	Wed, 30 Jan 2008 19:28:09 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	travis@....com
Cc:	Geert Uytterhoeven <Geert.Uytterhoeven@...ycom.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Christoph Lameter <clameter@....com>,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	Paul Mackerras <paulus@...ba.org>
Subject: Re: [PATCH 5/6] powerpc: Use generic per cpu linux-2.6.git


* travis@....com <travis@....com> wrote:

> Powerpc has a way to determine the address of the per cpu area of the 
> currently executing processor via the paca and the array of per cpu 
> offsets is avoided by looking up the per cpu area from the remote 
> paca's (copying x86_64).

i needed the fix below to get my powerpc crosscompile build to succeed.

	Ingo

-------------->
Subject: powerpc: percpu build fix
From: Ingo Molnar <mingo@...e.hu>

Signed-off-by: Ingo Molnar <mingo@...e.hu>
---
 include/asm-powerpc/percpu.h |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Index: linux-x86.q/include/asm-powerpc/percpu.h
===================================================================
--- linux-x86.q.orig/include/asm-powerpc/percpu.h
+++ linux-x86.q/include/asm-powerpc/percpu.h
@@ -13,7 +13,7 @@
 #include <asm/paca.h>
 
 #define __per_cpu_offset(cpu) (paca[cpu].data_offset)
-#define __my_cpu_offset() get_paca()->data_offset
+#define __my_cpu_offset get_paca()->data_offset
 #define per_cpu_offset(x) (__per_cpu_offset(x))
 
 #endif /* CONFIG_SMP */
--
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