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

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Message-ID: <20141027151327.GE9734@suse.de>
Date:	Mon, 27 Oct 2014 16:13:27 +0100
From:	Joerg Roedel <jroedel@...e.de>
To:	Oded Gabbay <oded.gabbay@....com>
Cc:	Jesse Barnes <jbarnes@...tuousgeek.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] mm: export find_extend_vma and handle_mm_fault for
 driver use

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
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