linux-kernel - Re: [PATCH] swiotlb: add "dma_attrs" argument to alloc and free, to match dma_map

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Date:	Thu, 24 May 2012 13:47:41 -0400
From:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
To:	Alessandro Rubini <rubini@...dd.com>
Cc:	linux-kernel@...r.kernel.org, x86@...nel.org,
	linux-ia64@...r.kernel.org, linux-mips@...ux-mips.org,
	Giancarlo Asnaghi <giancarlo.asnaghi@...com>,
	Tony Luck <tony.luck@...el.com>,
	Fenghua Yu <fenghua.yu@...el.com>,
	Ralf Baechle <ralf@...ux-mips.org>,
	Guan Xuetao <gxt@...c.pku.edu.cn>,
	Thomas Gleixner <tglx@...utronix.de>,
	Kyungmin Park <kyungmin.park@...sung.com>,
	FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>
Subject: Re: [PATCH] swiotlb: add "dma_attrs" argument to alloc and free, to
 match dma_map_ops

On Thu, May 24, 2012 at 01:44:22PM +0200, Alessandro Rubini wrote:
> The alloc and free pointers within "struct dma_map_ops" receive a
> pointer to dma_attrs that was not present in the generic swiotlb
> functions.  For this reason, a few files had a local wrapper for the
> free function that just removes the attrs argument before calling the
> generic function.
> 
> This patch adds the extra argument to generic functions and removes
> such wrappers when they are no more needed.  This also fixes a
> compiler warning for sta2x11-fixup.c, that would have required yet
> another wrapper.
> 
> Signed-off-by: Alessandro Rubini <rubini@...dd.com>
> Acked-by: Giancarlo Asnaghi <giancarlo.asnaghi@...com>
> Cc: Tony Luck <tony.luck@...el.com>
> Cc: Fenghua Yu <fenghua.yu@...el.com>
> Cc: Ralf Baechle <ralf@...ux-mips.org>
> Cc: Guan Xuetao <gxt@...c.pku.edu.cn>
> Cc: Thomas Gleixner <tglx@...utronix.de>
> Cc: Kyungmin Park <kyungmin.park@...sung.com>
> Cc: FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>
> Cc: Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
> ---
>  arch/ia64/kernel/pci-swiotlb.c       |   11 ++---------
>  arch/mips/cavium-octeon/dma-octeon.c |    4 ++--
>  arch/unicore32/mm/dma-swiotlb.c      |   22 ++--------------------
>  arch/x86/kernel/pci-swiotlb.c        |   11 ++---------
>  arch/x86/pci/sta2x11-fixup.c         |    3 ++-
>  include/linux/swiotlb.h              |    7 ++++---
>  lib/swiotlb.c                        |    5 +++--

So .. what is this based on? I see in mainline  alloc_coherent and free_coherent
which are obviously changed here.

Don't you also need to change these two files:

 arch/x86/xen/pci-swiotlb-xen.c
 drivers/xen/swiotlb-xen.c
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