linux-kernel - Re: [PATCH 1/2] mm: export find_extend_vma and handle_mm

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Message-ID: <20141027083552.4af5753f@jbarnes-hsw>
Date:	Mon, 27 Oct 2014 08:35:52 -0700
From:	Jesse Barnes <jbarnes@...tuousgeek.org>
To:	Oded Gabbay <oded.gabbay@....com>
Cc:	Joerg Roedel <jroedel@...e.de>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/2] mm: export find_extend_vma and handle_mm_fault for
 driver use

Thanks, I have no way of testing this, but I'm hopeful. :)

Jesse

On Mon, 27 Oct 2014 17:15:45 +0200
Oded Gabbay <oded.gabbay@....com> wrote:

> Sure, no problem
> 
>      Oded
> 
> On 10/27/2014 05:13 PM, Joerg Roedel wrote:
> 
> Hi Oded,
> 
> can you please test these patches with the KFD driver and make sure
> nothing breaks for you? I really like this improvement and it would be
> great to send it upstream for v3.19.
> 
> Thanks,
> 
> 	Joerg
> 
> On Fri, Oct 24, 2014 at 12:34:30PM -0700, Jesse Barnes wrote:
> 
> > This lets drivers like the AMD IOMMUv2 driver handle faults a bit more
> > simply, rather than doing tricks with page refs and get_user_pages().
> >
> > Signed-off-by: Jesse Barnes <jbarnes@...tuousgeek.org>
> > ---
> >   mm/memory.c | 1 +
> >   mm/mmap.c   | 2 ++
> >   2 files changed, 3 insertions(+)
> >
> > diff --git a/mm/memory.c b/mm/memory.c
> > index 1cc6bfb..969ff0c 100644
> > --- a/mm/memory.c
> > +++ b/mm/memory.c
> > @@ -3378,6 +3378,7 @@ int handle_mm_fault(struct mm_struct *mm, struct vm_area_struct *vma,
> >   
> >   	return ret;
> >   }
> > +EXPORT_SYMBOL_GPL(handle_mm_fault);
> >   
> >   #ifndef __PAGETABLE_PUD_FOLDED
> >   /*
> > diff --git a/mm/mmap.c b/mm/mmap.c
> > index 7f85520..2ee7971 100644
> > --- a/mm/mmap.c
> > +++ b/mm/mmap.c
> > @@ -2359,6 +2359,8 @@ find_extend_vma(struct mm_struct *mm, unsigned long addr)
> >   }
> >   #endif
> >   
> > +EXPORT_SYMBOL_GPL(find_extend_vma);
> > +
> >   /*
> >    * Ok - we have the memory areas we should free on the vma list,
> >    * so release them, and do the vma updates.
> > -- 
> > 1.9.1
> 
> 


-- 
Jesse Barnes, Intel Open Source Technology Center
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