From: Michael Schmitz <schmitzmic@gmail.com>
To: Arnd Bergmann <arnd@kernel.org>,
linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org
Cc: Arnd Bergmann <arnd@arndb.de>, Jakub Kicinski <kuba@kernel.org>,
Christoph Hellwig <hch@infradead.org>,
Marek Szyprowski <m.szyprowski@samsung.com>,
Robin Murphy <robin.murphy@arm.com>,
iommu@lists.linux-foundation.org,
Khalid Aziz <khalid@gonehiking.org>,
"Maciej W . Rozycki" <macro@orcam.me.uk>,
Matt Wang <wwentao@vmware.com>,
Miquel van Smoorenburg <mikevs@xs4all.net>,
Mark Salyzyn <salyzyn@android.com>,
linuxppc-dev@lists.ozlabs.org, linux-arch@vger.kernel.org,
linux-alpha@vger.kernel.org, linux-m68k@lists.linux-m68k.org,
linux-parisc@vger.kernel.org, Denis Efremov <efremov@linux.com>,
Geert Uytterhoeven <geert@linux-m68k.org>,
Michael Ellerman <mpe@ellerman.id.au>
Subject: Re: [PATCH v2 3/3] arch/*/: remove CONFIG_VIRT_TO_BUS
Date: Sat, 18 Jun 2022 13:06:40 +1200 [thread overview]
Message-ID: <6ba86afe-bf9f-1aca-7af1-d0d348d75ffc@gmail.com> (raw)
In-Reply-To: <20220617125750.728590-4-arnd@kernel.org>
Arnd,
Am 18.06.2022 um 00:57 schrieb Arnd Bergmann:
> From: Arnd Bergmann <arnd@arndb.de>
>
> All architecture-independent users of virt_to_bus() and bus_to_virt()
> have been fixed to use the dma mapping interfaces or have been
> removed now. This means the definitions on most architectures, and the
> CONFIG_VIRT_TO_BUS symbol are now obsolete and can be removed.
>
> The only exceptions to this are a few network and scsi drivers for m68k
> Amiga and VME machines and ppc32 Macintosh. These drivers work correctly
> with the old interfaces and are probably not worth changing.
The Amiga SCSI drivers are all old WD33C93 ones, and replacing
virt_to_bus by virt_to_phys in the dma_setup() function there would
cause no functional change at all.
drivers/vme/bridges/vme_ca91cx42.c hasn't been used at all on m68k (it
is a PCI-to-VME bridge chipset driver that would be needed on
architectures that natively use a PCI bus). I haven't found anything
that selects that driver, so not sure it is even still in use??
That would allow you to drop the remaining virt_to_bus define from
arch/m68k/include/asm/virtconvert.h.
I could submit a patch to convert the Amiga SCSI drivers to use
virt_to_phys if Geert and the SCSI maintainers think it's worth the churn.
32bit powerpc is a different matter though.
Cheers,
Michael
next prev parent reply other threads:[~2022-06-18 1:06 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-06-17 12:57 [PATCH v2 0/3] phase out CONFIG_VIRT_TO_BUS Arnd Bergmann
2022-06-17 12:57 ` [PATCH v2 1/3] scsi: dpt_i2o: drop stale VIRT_TO_BUS dependency Arnd Bergmann
2022-06-21 8:43 ` Hannes Reinecke
2022-06-17 12:57 ` [PATCH v2 2/3] scsi: BusLogic remove bus_to_virt Arnd Bergmann
2022-06-17 14:02 ` Robin Murphy
2022-06-21 8:45 ` Hannes Reinecke
2022-06-21 21:56 ` Khalid Aziz
2022-06-23 14:47 ` Arnd Bergmann
2022-06-24 15:38 ` Khalid Aziz
2022-06-24 15:43 ` Arnd Bergmann
2022-06-17 12:57 ` [PATCH v2 3/3] arch/*/: remove CONFIG_VIRT_TO_BUS Arnd Bergmann
2022-06-18 1:06 ` Michael Schmitz [this message]
2022-06-24 9:10 ` Arnd Bergmann
2022-06-26 5:21 ` Michael Schmitz
2022-06-26 8:36 ` Arnd Bergmann
2022-06-27 8:09 ` Michael Schmitz
2022-06-27 8:26 ` Geert Uytterhoeven
2022-06-27 21:12 ` Michael Schmitz
2022-06-28 3:25 ` Michael Schmitz
2022-06-28 7:03 ` Geert Uytterhoeven
2022-06-28 21:03 ` Michael Schmitz
2022-06-28 21:50 ` Arnd Bergmann
2022-06-28 23:09 ` Michael Schmitz
2022-06-28 23:50 ` Bart Van Assche
2022-06-29 0:01 ` Michael Schmitz
2022-06-29 0:14 ` Michael Schmitz
2022-06-29 6:21 ` Christoph Hellwig
2022-06-30 19:21 ` Michael Schmitz
2022-06-30 8:04 ` David Laight
2022-06-30 9:40 ` Christophe Leroy
2022-06-30 10:32 ` David Laight
2022-06-28 7:08 ` Arnd Bergmann
2022-06-28 21:38 ` Michael Schmitz
2022-06-28 21:55 ` Arnd Bergmann
2022-06-28 23:43 ` Michael Schmitz
2022-06-29 6:25 ` Christoph Hellwig
2022-06-30 19:26 ` Michael Schmitz
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