linux.git/drivers/mtd/mtdoops.c, branch v2.6.29

[MTD] update internal API to support 64-bit device size

2008-12-10T13:37:21+00:00

MTD internal API presently uses 32-bit values to represent
device size.  This patch updates them to 64-bits but leaves
the external API unchanged.  Extending the external API
is a separate issue for several reasons.  First, no one
needs it at the moment.  Secondly, whether the implementation
is done with IOCTLs, sysfs or both is still debated.  Thirdly
external API changes require the internal API to be accepted
first.

Note that although the MTD API will be able to support 64-bit
device sizes, existing drivers do not and are not required
to do so, although NAND base has been updated.

In general, changing from 32-bit to 64-bit values cause little
or no changes to the majority of the code with the following
exceptions:
    	- printk message formats
    	- division and modulus of 64-bit values
    	- NAND base support
	- 32-bit local variables used by mtdpart and mtdconcat
	- naughtily assuming one structure maps to another
	in MEMERASE ioctl

Signed-off-by: Adrian Hunter 
Signed-off-by: Artem Bityutskiy 
Signed-off-by: David Woodhouse

[MTD] mtdoops: Fix a bug where block may not be erased

2008-10-18T10:51:48+00:00

This makes the driver erase a block when it doesn't find any
existing saved log messages which is safer than assuming the
flash was already erased.

Signed-off-by: Richard Purdie 
Signed-off-by: David Woodhouse

[MTD] mtdoops: Add a magic number to logged kernel oops

2008-10-18T10:51:27+00:00

Add a magic number to logged kernel oops messages so that they
can be more accurately detected rather than just having to rely
on the sequence number. This also allows easier detection of
saved crashes by userspace.

Signed-off-by: Richard Purdie 
Signed-off-by: David Woodhouse

[MTD] mtdoops: Fix an off by one error

2008-10-18T10:51:13+00:00

Fix an off by one error in the mtdoops driver

Signed-off-by: Richard Purdie 
Signed-off-by: David Woodhouse

[MTD] mtdoops.c: make struct oops_cxt static again

2008-04-22T11:35:34+00:00

struct oops_cxt needlessly became global.

Signed-off-by: Adrian Bunk 
Signed-off-by: Andrew Morton 
Signed-off-by: David Woodhouse

[MTD] Fix mtdoops.c compilation

2008-02-07T10:50:57+00:00

drivers/mtd/mtdoops.c: In function ‘mtdoops_console_sync’:
drivers/mtd/mtdoops.c:329: error: implicit declaration of function ‘in_interrupt’

Signed-off-by: David Woodhouse

[MTD] mtdoops: Use the panic_write function when present

2008-02-07T10:31:04+00:00

When the MTD provides a panic_write function, use it.

Signed-off-by: Richard Purdie 
Signed-off-by: David Woodhouse

[MTD] mtdoops: Various minor cleanups

2008-02-03T07:19:24+00:00

Various minor cleaups to mtdoops:
  * Don't support the mtd->erasesize < OOPS_PAGE_SIZE case
  * Tweak printks and make the device mtdoops connects to more visible
  * CON_PRINTBUFFER flag is uneeded

Signed-off-by: Richard Purdie 
Signed-off-by: David Woodhouse

[MTD] mtdoops: Ensure sequential write to the buffer

2008-02-03T07:18:58+00:00

Add a spinlock to ensure writes to the mtdoops buffer memory are
sequential and don't race.

Signed-off-by: Richard Purdie 
Signed-off-by: David Woodhouse

[MTD] mtdoops: Perform write operations in a workqueue

2008-02-03T07:14:41+00:00

Writing to the flash needs to be done in a workqueue. The console
write functions may be called in any context which can lead to
lockups otherwise.

Signed-off-by: Richard Purdie 
Signed-off-by: David Woodhouse