linux-kernel - Re: [PATCH] mm: Define set_pmd_at for numabalance for CONFIG

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Date:	Sat, 19 Jan 2013 10:36:05 +0100
From:	Michal Hocko <mhocko@...e.cz>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	linux-mm@...ck.org, Andrea Arcangeli <aarcange@...hat.com>,
	Mel Gorman <mgorman@...e.de>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] mm: Define set_pmd_at for numabalance for CONFIG_PARAVIRT

On Fri 18-01-13 13:39:01, Andrew Morton wrote:
> On Fri, 18 Jan 2013 10:33:24 +0100
> Michal Hocko <mhocko@...e.cz> wrote:
> 
> > CONFIG_PARAVIRT defines set_pmd_at only for CONFIG_TRANSPARENT_HUGEPAGE
> > which leads to the following compile errors when randconfig selected
> > CONFIG_NUMA_BALANCING && CONFIG_PARAVIRT && !CONFIG_TRANSPARENT_HUGEPAGE:
> > 
> > mm/mprotect.c: In function ___change_pmd_protnuma___:
> > mm/mprotect.c:120: error: implicit declaration of function ___set_pmd_at___
> > 
> > mm/memory.c: In function ___do_pmd_numa_page___:
> > mm/memory.c:3529: error: implicit declaration of function ___set_pmd_at___
> > 
> > Signed-off-by: Michal Hocko <mhocko@...e.cz>
> > ---
> >  arch/x86/include/asm/paravirt.h |    2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> > 
> > diff --git a/arch/x86/include/asm/paravirt.h b/arch/x86/include/asm/paravirt.h
> > index a0facf3..f551e89 100644
> > --- a/arch/x86/include/asm/paravirt.h
> > +++ b/arch/x86/include/asm/paravirt.h
> > @@ -528,7 +528,7 @@ static inline void set_pte_at(struct mm_struct *mm, unsigned long addr,
> >  		PVOP_VCALL4(pv_mmu_ops.set_pte_at, mm, addr, ptep, pte.pte);
> >  }
> >  
> > -#ifdef CONFIG_TRANSPARENT_HUGEPAGE
> > +#if defined(CONFIG_TRANSPARENT_HUGEPAGE) || defined(CONFIG_NUMA_BALANCING)
> >  static inline void set_pmd_at(struct mm_struct *mm, unsigned long addr,
> >  			      pmd_t *pmdp, pmd_t pmd)
> >  {
> 
> Confused - there is no "#ifdef CONFIG_TRANSPARENT_HUGEPAGE" in there in
> any kernel version I can think of.

Ohh, I am missing c36e0501ee91d7616a188efbf9714b1fce150032 which didn't
go via your tree.

Sorry for the noise.
-- 
Michal Hocko
SUSE Labs
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