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Message-ID: <22c797d00710240924p12576b8bqd9c498a403588ea0@mail.gmail.com> Date: Wed, 24 Oct 2007 09:24:38 -0700 From: "atom ota" <atomota@...epyhammer.com> To: "Jason Lunz" <lunz@...ooley.org> Cc: "David Woodhouse" <dwmw2@...radead.org>, "Jeff Dike" <jdike@...toit.com>, uml-user@...ts.sourceforge.net, linux-mtd@...ts.infradead.org, lkml <linux-kernel@...r.kernel.org> Subject: Re: [PATCH] allow use of mtd and jffs2 on uml I'm not sure how to follow the "push ... down" instructions. I used your patch to build UML and jffs2 ran fine with block2mtd using a file attached to /dev/ubdb. Too bad about nandsim though. Tom On 10/24/07, Jason Lunz <lunz@...ooley.org> wrote: > > Push the "depends on HAS_IOMEM" in mtd down closer to the parts that > actually need it. This allows enough of mtd to build to let jffs2 be > used on uml. > > Signed-off-by: Jason Lunz <lunz@...ooley.org> > > --- > > On Wed, Oct 24, 2007 at 07:51:29AM +0100, David Woodhouse wrote: > > Why build anything in chips/ or maps/ ? > > Did I mention it was crude? :) I followed your suggestion, and this > version is much cleaner. > > > We should make sure mtdram, nandsim and onenandsim are all buildable > > too. > > I wanted to keep this a pure kbuild change. Getting nand and onenand to > build for uml would involve making them not use readb and friends, or > getting uml to provide stub versions. > > > arch/um/Kconfig | 4 +--- > drivers/mtd/Kconfig | 12 +++++++----- > drivers/mtd/chips/Kconfig | 11 ++++++++--- > drivers/mtd/devices/Kconfig | 7 +++++++ > 4 files changed, 23 insertions(+), 11 deletions(-) > > Index: linux-2.6.23.1-uml/arch/um/Kconfig > =================================================================== > --- linux-2.6.23.1-uml.orig/arch/um/Kconfig > +++ linux-2.6.23.1-uml/arch/um/Kconfig > @@ -326,9 +326,7 @@ > > source "drivers/md/Kconfig" > > -if BROKEN > - source "drivers/mtd/Kconfig" > -endif > +source "drivers/mtd/Kconfig" > > #This is just to shut up some Kconfig warnings, so no prompt. > config INPUT > Index: linux-2.6.23.1-uml/drivers/mtd/devices/Kconfig > =================================================================== > --- linux-2.6.23.1-uml.orig/drivers/mtd/devices/Kconfig > +++ linux-2.6.23.1-uml/drivers/mtd/devices/Kconfig > @@ -78,6 +78,7 @@ > > config MTD_SLRAM > tristate "Uncached system RAM" > + depends on HAS_IOMEM > help > If your CPU cannot cache all of the physical memory in your machine, > you can still use it for storage or swap by using this driver to > @@ -85,6 +86,7 @@ > > config MTD_PHRAM > tristate "Physical system RAM" > + depends on HAS_IOMEM > help > This is a re-implementation of the slram driver above. > > @@ -151,10 +153,13 @@ > Testing MTD users (eg JFFS2) on large media and media that might > be removed during a write (using the floppy drive). > > +if HAS_IOMEM > comment "Disk-On-Chip Device Drivers" > +endif > > config MTD_DOC2000 > tristate "M-Systems Disk-On-Chip 2000 and Millennium (DEPRECATED)" > + depends on HAS_IOMEM > select MTD_DOCPROBE > select MTD_NAND_IDS > ---help--- > @@ -177,6 +182,7 @@ > > config MTD_DOC2001 > tristate "M-Systems Disk-On-Chip Millennium-only alternative driver (DEPRECATED)" > + depends on HAS_IOMEM > select MTD_DOCPROBE > select MTD_NAND_IDS > ---help--- > @@ -198,6 +204,7 @@ > > config MTD_DOC2001PLUS > tristate "M-Systems Disk-On-Chip Millennium Plus" > + depends on HAS_IOMEM > select MTD_DOCPROBE > select MTD_NAND_IDS > ---help--- > Index: linux-2.6.23.1-uml/drivers/mtd/Kconfig > =================================================================== > --- linux-2.6.23.1-uml.orig/drivers/mtd/Kconfig > +++ linux-2.6.23.1-uml/drivers/mtd/Kconfig > @@ -2,7 +2,6 @@ > > menuconfig MTD > tristate "Memory Technology Device (MTD) support" > - depends on HAS_IOMEM > help > Memory Technology Devices are flash, RAM and similar chips, often > used for solid state file systems on embedded devices. This option > @@ -278,15 +277,18 @@ > This enables read only access to SmartMedia formatted NAND > flash. You can mount it with FAT file system. > > -source "drivers/mtd/chips/Kconfig" > > -source "drivers/mtd/maps/Kconfig" > +if HAS_IOMEM > + source "drivers/mtd/chips/Kconfig" > + source "drivers/mtd/maps/Kconfig" > +endif > > source "drivers/mtd/devices/Kconfig" > > -source "drivers/mtd/nand/Kconfig" > - > -source "drivers/mtd/onenand/Kconfig" > +if HAS_IOMEM > + source "drivers/mtd/nand/Kconfig" > + source "drivers/mtd/onenand/Kconfig" > +endif > > source "drivers/mtd/ubi/Kconfig" > > Index: linux-2.6.23.1-uml/drivers/mtd/Makefile > =================================================================== > --- linux-2.6.23.1-uml.orig/drivers/mtd/Makefile > +++ linux-2.6.23.1-uml/drivers/mtd/Makefile > @@ -26,6 +26,9 @@ > nftl-objs := nftlcore.o nftlmount.o > inftl-objs := inftlcore.o inftlmount.o > > -obj-y += chips/ maps/ devices/ nand/ onenand/ > +obj-y += devices/ > +ifdef CONFIG_HAS_IOMEM > +obj-y += chips/ maps/ nand/ onenand/ > +endif > > obj-$(CONFIG_MTD_UBI) += ubi/ > - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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