linux-kernel - Re: [PATCH] Fix sparsemem configuration

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Message-ID: <20091014074258.GA32288@flint.arm.linux.org.uk>
Date:	Wed, 14 Oct 2009 08:42:58 +0100
From:	Russell King <rmk+lkml@....linux.org.uk>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Linux Kernel List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] Fix sparsemem configuration

On Tue, Oct 13, 2009 at 07:49:50PM -0700, Andrew Morton wrote:
> On Mon, 5 Oct 2009 16:05:30 +0100 Russell King <rmk+lkml@....linux.org.uk> wrote:
> 
> > Currently, sparsemem is only available if EXPERIMENTAL is enabled.
> > However, it hasn't ever been marked experimental.
> > 
> > It's been about four years since sparsemem was merged, and we have
> > platforms which depend on it; allow architectures to decide whether
> > sparsemem should be the default memory model.
> > 
> > Signed-off-by: Russell King <rmk+kernel@....linux.org.uk>
> > --
> >  mm/Kconfig |    2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> > 
> > diff --git a/mm/Kconfig b/mm/Kconfig
> > index 2477607..95b2965 100644
> > --- a/mm/Kconfig
> > +++ b/mm/Kconfig
> > @@ -67,7 +67,7 @@ config DISCONTIGMEM
> >  
> >  config SPARSEMEM
> >  	def_bool y
> > -	depends on SPARSEMEM_MANUAL
> > +	depends on (!SELECT_MEMORY_MODEL && ARCH_SPARSEMEM_ENABLE) || SPARSEMEM_MANUAL
> >  
> >  config FLATMEM
> >  	def_bool y
> 
> Can you suggest which kernel version(s) we should merge this into?  I'm
> struggling.

I don't see any reason not to merge it into the current -rc.  Not sure
about -stable since there hasn't been a bug report against the machines
which currently use sparsemem.  That's not to say that people aren't
using it - they probably believe CONFIG_EXPERIMENTAL needs to be set as
per the machine's defconfig.

-- 
Russell King
 Linux kernel    2.6 ARM Linux   - http://www.arm.linux.org.uk/
 maintainer of:
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