MTD CVS update: 'mtd/kernel docecc.c nftlmount.c Makefile doc2001.c docprobe.c nftl.c'

[David Woodhouse]

Update of /home/cvs/mtd/kernel
In directory infradead.org:/tmp/cvs-serv5467/kernel

Modified Files:
	Makefile doc2001.c docprobe.c nftl.c 
Added Files:
	docecc.c nftlmount.c 
Log Message:
Goodies from Fabrice Bellard:

nftlmount.c: (new file)

Do extensive consistency tests when mounting NFTL. Correct handling of
bad block tables.

docecc.c: (new file)

Implementation of a disk on chip compatible ECC correction by using the
GPLed Reed Solomon routines of Phil Karn.

nftl.c:

- Suppressed pending block optimization : it is unsafe unless we write
  the pending block *before* doing the chain formatting.

- Use NFTL_mount to mount NFTL.

- Use NFTL_formatblock for safe block formatting.

- Suppressed VirtualUnitTable[] which is not necessary (saves
  memory). It was only used to get free blocks, and ReplUnitTable[]
  can be used for that purpose.

- Oring of the OOB data to handle single bit errors (bit are going
  from 1 to 0 when the flash becomes old).

- Erase info in NFTLrecord

- Extensive errors checks.

docprobe.c:

- Added option to give a single doc address

doc2001.c:

- use ECC correction code.


Some notes:

- lastEUN should really be suppressed because it is more logical to have
a block count (I added nb_blocks for that purpose).
- I noticed that the doc_read_ecc is slower than the MSystems version.
16 bit accesses should be done (even if the bus is 8 bits wide, it
should be faster to do 16 bit accesses).




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