Re: [patch 11/14] Powerpc: Use generic per cpu

Kumar Gala
2007-11-27T07:42:24Z

On Nov 26, 2007, at 6:14 PM, Christoph Lameter 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).
>
> Cc: Paul Mackerras <paulus@samba.org>
> Signed-off-by: Christoph Lameter <clameter@sgi.com>
>
> ---
> include/asm-powerpc/percpu.h | 19 -------------------
> 1 file changed, 19 deletions(-)
>
> Index: linux-2.6/include/asm-powerpc/percpu.h
> ===================================================================
> --- linux-2.6.orig/include/asm-powerpc/percpu.h 2007-11-24
> 10:27:31.088350556 -0800
> +++ linux-2.6/include/asm-powerpc/percpu.h 2007-11-24
> 10:29:20.752350757 -0800
> @@ -16,25 +16,6 @@
> #define __my_cpu_offset() get_paca()->data_offset
> #define per_cpu_offset(x) (__per_cpu_offset(x))

This concerns me. paca doesn't exist on all PPC platforms.

- k