Re: MTD/mtdblock.c uclinux 2.0.38?

Steve Kranz
2001-07-11T19:25:26Z

> uclinux 2.0.38 & MTD?
> Should work. Probably doesn't. Give me individual
> instances of places I broke the 2.0 compile, preferably
> with patches, and we'll deal with it.

Shown below are the problems I encountered when
attempting to build the latest MTD tree for uclinux
2.0.38. For the moment I have suspended efforts to get
this working under 2.0.38 and would be very interested
if someone could provide a MTD version or patch that
will work with that kernel. If so, please let me
know. Thank you! :-)

Steve Kranz
skranz@ridgerun.com

---------------------------
My choosen config settings:
---------------------------
CONFIG_MTD=y
CONFIG_MTD_DEBUG=y
CONFIG_MTD_DEBUG_VERBOSE=3
CONFIG_MTD_CHAR=y
CONFIG_NFTL=y
CONFIG_NFTL_RW=y
CONFIG_MTD_NAND=y

----------------
Missing Headers:
----------------
MTD depends on these headers which don't exist
within the uclinux tree.
linux/slab.h
linux/spinlock.h
linux/kmod.h

---------------
Other Problems:
---------------
include/linux/mtd/map.h line 65, generates error:
"field `list' has incomplete type"

Attempts to compile the MTD
statements __MOD_INC_USE_COUNT() and __MOD_DEC_USE_COUNT()
found in various locations with the MTD tree
generate these compile errors:
"structure has no member named `uc'"
"structure has no member named `flags'"

--------------
Version Notes:
--------------
I downloaded via cvs.infradead.org on
July 9, 2001. I placed it into my 2.0.38
uclinux tree and then applied the MTD
supplied patch mtd-uClinux-2.0.38.1pre7.patch.

-----------

David Woodhouse wrote:

> skranz@ridgerun.com said:
> > 1. Anybody know if instruction exist for installing MTD and nftl into
> > an uclinux 2.0.38 tree?
>
> Should work. Probably doesn't. Give me individual instances of places I
> broke the 2.0 compile, preferably with patches, and we'll deal with it.
>
> > 2. I'm interested in getting the SmartMedia slot of this arm7 board
> > working for both read and write -- and I'd like the SmartMedia card to
> > be readable/writable by a Windows machine too. Am I correct that this
> > interoperability constraint will prevent me from using JFFS? I'm
> > assuming that a vfat fs with MTD/nftl will do the trick for me. Yes,
> > no?
>
> You need to implement the SmartMedia translation layer format. It looks like
> there's enough information on the Samsung web site to do that.
>
> > 3. I've been glancing at MTD code and didn't think I saw any logic to
> > deal with the bad (unusable) blocks of a NAND flash device. Did I just
> > miss it?
>
> Done in the SmartMedia translation layer, not in the underlying device
> driver.
>
> --
> dwmw2
>
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