linux-kernel - Re: [PATCH 01/10] Add iommu_init to x86_init

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Message-ID: <84144f020911091202h26dbfad4qf0651ae327444fc0@mail.gmail.com>
Date:	Mon, 9 Nov 2009 22:02:24 +0200
From:	Pekka Enberg <penberg@...helsinki.fi>
To:	FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>
Cc:	linux-kernel@...r.kernel.org, chrisw@...s-sol.org,
	dwmw2@...radead.org, joerg.roedel@....com, mingo@...e.hu
Subject: Re: [PATCH 01/10] Add iommu_init to x86_init_ops

On Wed, Oct 28, 2009 at 8:47 AM, FUJITA Tomonori
<fujita.tomonori@....ntt.co.jp> wrote:
> We call the detections functions of all the IOMMUs then all their
> initialization functions. THe latter is pointless since we don't
> detect multiple different IOMMUs. What we need to do is calling the
> initialization function of the detected IOMMU.
>
> This adds iommu_init hook to x86_init_ops so if an IOMMU detection
> function can set its initialization function to the hook.
>
> Signed-off-by: FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>
> ---
>  arch/x86/include/asm/iommu.h    |    1 +
>  arch/x86/include/asm/x86_init.h |    9 +++++++++
>  arch/x86/kernel/pci-dma.c       |    2 ++
>  arch/x86/kernel/x86_init.c      |    5 +++++
>  4 files changed, 17 insertions(+), 0 deletions(-)
>
> diff --git a/arch/x86/include/asm/iommu.h b/arch/x86/include/asm/iommu.h
> index fd6d21b..42aa977 100644
> --- a/arch/x86/include/asm/iommu.h
> +++ b/arch/x86/include/asm/iommu.h
> @@ -3,6 +3,7 @@
>
>  extern void pci_iommu_shutdown(void);
>  extern void no_iommu_init(void);
> +static inline int iommu_init_noop(void) { return 0; }

Why is this function not put in x86_init.c?
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