linux-kernel - Re: [PATCH] S390: add pci_iomap_wc() and pci_iomap_wc

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Message-ID: <20150828060605.GF26741@gmail.com>
Date:	Fri, 28 Aug 2015 08:06:05 +0200
From:	Ingo Molnar <mingo@...nel.org>
To:	"Luis R. Rodriguez" <mcgrof@...not-panic.com>
Cc:	schwidefsky@...ibm.com, heiko.carstens@...ibm.com,
	linux-s390@...r.kernel.org, bp@...e.de, linux@...ck-us.net,
	plagnioj@...osoft.com, tomi.valkeinen@...com,
	linux-fbdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	fengguang.wu@...el.com, akpm@...ux-foundation.org,
	rostedt@...dmis.org, "Luis R. Rodriguez" <mcgrof@...e.com>
Subject: Re: [PATCH] S390: add pci_iomap_wc() and pci_iomap_wc_range()


* Luis R. Rodriguez <mcgrof@...not-panic.com> wrote:

> From: "Luis R. Rodriguez" <mcgrof@...e.com>
> 
> S390 requires its own implementation of pcio_iomap*() calls
> is because it has its "BAR spaces are not disjunctive on s390
> so we need the bar parameter of pci_iomap to find the corresponding
> device and create the mapping cookie" -- in summary, it has its own
> lookup/lock solution.
> 
> It does not include asm-generic/pci_iomap.h
> 
> Since it currenty maps ioremap_wc() to ioremap_nocache() and that's
> the architecture default we can easily just map the wc calls to
> the default calls as well.
> 
> Cc: Guenter Roeck <linux@...ck-us.net>
> Cc: Jean-Christophe Plagniol-Villard <plagnioj@...osoft.com>
> Cc: Tomi Valkeinen <tomi.valkeinen@...com>
> Cc: linux-fbdev@...r.kernel.org
> Cc: linux-kernel@...r.kernel.org
> Cc: Borislav Petkov <bp@...e.de>
> Cc: Ingo Molnar <mingo@...nel.org>
> Cc: Fengguang Wu <fengguang.wu@...el.com>
> Cc: Andrew Morton <akpm@...ux-foundation.org>
> Cc: Steven Rostedt <rostedt@...dmis.org>
> Reported-by: 0 day bot
> Signed-off-by: Luis R. Rodriguez <mcgrof@...e.com>
> ---
> 
> This broke through some series that went into Ingo's tip tree which
> I added. As such I *think* this should go through Ingo's tip tree.
> Let me know. Up to you guys.

I fixed the changelog to explain all this.

Also, is there any other architecture that got broken by:

   1b3d4200c1e0 PCI: Add pci_iomap_wc() variants

?

Thanks,

	Ingo
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