linux-kernel - Re: [PATCH 03/06] iommu/ipmmu-vmsa: Break out utlb control function

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Message-ID: <CAMuHMdXYzO=+xuH2UwOUzDPoiyW-fBBaby91Ywr_Moa9bi17YQ@mail.gmail.com>
Date:	Tue, 15 Dec 2015 16:48:42 +0100
From:	Geert Uytterhoeven <geert@...ux-m68k.org>
To:	Magnus Damm <magnus.damm@...il.com>
Cc:	iommu@...ts.linux-foundation.org,
	Laurent Pinchart <laurent.pinchart+renesas@...asonboard.com>,
	Geert Uytterhoeven <geert+renesas@...der.be>,
	Linux-sh list <linux-sh@...r.kernel.org>,
	Joerg Roedel <joro@...tes.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Simon Horman <horms+renesas@...ge.net.au>
Subject: Re: [PATCH 03/06] iommu/ipmmu-vmsa: Break out utlb control function

Hi Magnus,

On Tue, Dec 15, 2015 at 1:02 PM, Magnus Damm <magnus.damm@...il.com> wrote:
> --- 0004/drivers/iommu/ipmmu-vmsa.c
> +++ work/drivers/iommu/ipmmu-vmsa.c     2015-12-15 13:17:40.580513000 +0900
> @@ -279,9 +279,18 @@ static void ipmmu_utlb_enable(struct ipm
>  static void ipmmu_utlb_disable(struct ipmmu_vmsa_domain *domain,
>                                unsigned int utlb)
>  {
> -       struct ipmmu_vmsa_device *mmu = domain->mmu;
> +       ipmmu_write(domain->mmu, IMUCTR(utlb), 0);
> +}
> +
> +static void ipmmu_utlb_ctrl(struct ipmmu_vmsa_domain *domain,
> +                           void (*fn)(struct ipmmu_vmsa_domain *,
> +                                      unsigned int utlb), struct device *dev)
> +{
> +       struct ipmmu_vmsa_dev_data *dev_data = get_dev_data(dev);
> +       unsigned int i;
>
> -       ipmmu_write(mmu, IMUCTR(utlb), 0);
> +       for (i = 0; i < dev_data->num_utlbs; ++i)
> +               fn(domain, dev_data->utlbs[i]);
>  }

Unless you have further plans with the "fn" parameter, I would simply pass
a bool enable/disable flag instead of a function pointer.

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds
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