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

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Message-ID: <544E61A1.7090400@amd.com>
Date:	Mon, 27 Oct 2014 17:15:45 +0200
From:	Oded Gabbay <oded.gabbay@....com>
To:	Joerg Roedel <jroedel@...e.de>
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

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

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