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

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Message-ID: <Pine.LNX.4.64.0711281051540.11968@schroedinger.engr.sgi.com>
Date:	Wed, 28 Nov 2007 10:54:45 -0800 (PST)
From:	Christoph Lameter <clameter@....com>
To:	Paul Mackerras <paulus@...ba.org>
cc:	Kumar Gala <galak@...nel.crashing.org>, akpm@...ux-foundation.org,
	linux-kernel@...r.kernel.org
Subject: Re: [patch 11/14] Powerpc: Use generic per cpu

On Wed, 28 Nov 2007, Paul Mackerras wrote:

> Christoph Lameter writes:
> 
> > On Wed, 28 Nov 2007, Paul Mackerras wrote:
> > 
> > > Did you try both 32-bit (CONFIG_64BIT=n) and 64-bit (CONFIG_64BIT=y)
> > > configurations?  The paca only exists in 64-bit kernels.
> > 
> > I build both and there is no dependency on 32bit or 64 bit in 
> > include/asm-powerpc/percpu.h. Both access the paca (whatever that is).
> 
> Look at line 3 of include/asm-powerpc/percpu.h:
> 
> #ifdef __powerpc64__
> 
> As far as I can see, after applying your series of patches, I end up
> with an unbalanced #ifdef in include/asm-powerpc/percpu.h.  I see 3
> #ifdef/#ifndef, but only two #endifs.  It needs another #endif after
> the #endif /* SMP */ to match the #ifdef __powerpc64__.  With that
> change it looks OK, since 32-bit uses asm-generic/percpu.h for both
> SMP and UP.

Ahhh.. Ok. Fixed.

Do you know where to get a ppc64 crosscompiler? I 
tried to build gcc for ppc64 but the build failed on x86_64.
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