linux-toradex.git/drivers/mtd/maps/uclinux.c, branch v4.2-rc3

mtd: uclinux: add a comment about why uclinux_ram_map must not be static

2013-02-04T07:26:30+00:00

I was (at least) the second person trying to fix a warning by sparse, so
document in the code why this is a bad idea and add an extern declaration to
make sparse happy.

Signed-off-by: Uwe Kleine-König 
Acked-by: Mike Frysinger 
Acked-by: Greg Ungerer 
Signed-off-by: Artem Bityutskiy

mtd: uclinux: support ROM and allow passing the base address

2013-02-04T07:26:30+00:00

This allows to put the filesystem at a defined address in ROM allowing
to save more precious RAM.

I think it's safe to default to ROM because the intention of using the
uclinux map is to use a romfs and so mtd-ram doesn't give you anything
that mtd-rom doesn't.

Signed-off-by: Uwe Kleine-König 
Acked-by: Greg Ungerer 
Signed-off-by: Artem Bityutskiy

mtd: fix wrong usage of ioremap_nocache() in uclinux.c map driver

2012-09-29T13:58:05+00:00

The uclinux.c mapping driver uses ioremap_nocache() to map its physical
mapping address to a system virtual address. Problem is that the region
it is mapping is not device memory. It is ordinary system RAM. On most
non-MMU systems this doesn't matter, and the mapping is always a 1:1
translation of the address. On paged memory systems on some architectures
the page table mappings are not compatible between normal RAM and device
memory.

If we want to use the uclinux.c mapping driver on real MMU enabled systems
we should be using the kernel virtual address that the mapping is at. For
architectures that support the traditional initrd they use phys_to_virt or
__va to convert the physical start initrd address to a kernel usable virtual
address. The uclinux filesystem mapping is even more restrictive than the
typical initrd, it always follows the kernels own bss section (so always in
directly mapped memory). Therefore we can use the usual phys_to_virt to
translate the physical start address to a virtual address.

Signed-off-by: Greg Ungerer 
Signed-off-by: Artem Bityutskiy 
Signed-off-by: David Woodhouse

mtd/uclinux: Use generic __bss_stop instead of _ebss

2012-06-27T07:59:43+00:00

The standard (see BSS_SECTION() in  and
) symbol for the end of BSS is __bss_stop.
This allows to remove all local declarations that have been added to
several architectures just to please CONFIG_MTD_UCLINUX.

Signed-off-by: Geert Uytterhoeven 
Acked-by: Paul Mundt 
Acked-by: Mike Frysinger 
Acked-by: Michal Simek 
Acked-by: Greg Ungerer

mtd: add leading underscore to all mtd functions

2012-03-26T23:20:01+00:00

This patch renames all MTD functions by adding a "_" prefix:

mtd->erase -> mtd->_erase
mtd->read_oob -> mtd->_read_oob
...

The reason is that we are re-working the MTD API and from now on it is
an error to use MTD function pointers directly - we have a corresponding
API call for every pointer. By adding a leading "_" we achieve the following:

1. Make sure we convert every direct pointer users
2. A leading "_" suggests that this interface is internal and it becomes
   less likely that people will use them directly
3. Make sure all the out-of-tree modules stop compiling and the owners
   spot the big API change and amend them.

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

mtd: uclinux: convert to mtd_device_register()

2011-05-25T01:23:09+00:00

Convert to mtd_device_register() and remove the CONFIG_MTD_PARTITIONS
preprocessor conditionals as partitioning is always available.

Signed-off-by: Jamie Iles 
Signed-off-by: Artem Bityutskiy 
Signed-off-by: David Woodhouse

mtd/maps: uclinux: fix building when partition support is disabled

2009-09-19T18:44:51+00:00

The uClinux map driver doesn't even use partitions, so we shouldn't require
it in order to work properly.

Signed-off-by: Timofei Bondarenko 
Signed-off-by: Mike Frysinger 
Signed-off-by: Sonic Zhang 
CC: Greg Ungerer 
CC: uclinux-dev@uclinux.org
CC: linux-mtd@lists.infradead.org

Signed-off-by: David Woodhouse

mtd: uclinux: mark local stuff static

2009-06-05T17:29:35+00:00

The uclinux_ram_mtdinfo, uclinux_romfs, and uclinux_point symbols do not
need to be visible outside of this module, so mark them static.

Signed-off-by: Mike Frysinger 
CC: Greg Ungerer 
CC: uclinux-dev@uclinux.org
CC: linux-mtd@lists.infradead.org
Signed-off-by: Artem Bityutskiy 
Signed-off-by: David Woodhouse

mtd: uclinux: allow systems to override map addr/size

2009-06-05T17:29:14+00:00

Due to a processor anomaly (05000263 to be exact), most Blackfin parts
cannot keep the embedded filesystem image directly after the kernel in
RAM.  Instead, the filesystem needs to be relocated to the end of memory.
As such, we need to tweak the map addr/size during boot for Blackfin
systems.  This can be done in any early arch/board init code.

Signed-off-by: Mike Frysinger 
CC: Paul Mundt 
CC: Greg Ungerer 
CC: uclinux-dev@uclinux.org
CC: linux-mtd@lists.infradead.org
Signed-off-by: Artem Bityutskiy 
Signed-off-by: David Woodhouse

[MTD] Make uclinux_mtd_cleanup and uclinux_mtd_init static

2008-12-10T13:00:33+00:00

The functions uclinux_mtd_cleanup and uclinux_mtd_init do
not heed to be global. Add the needed keyword to the file
drivers/mtd/maps/uclinux.c to make these functions static.

Signed-off-by: Dmitri Vorobiev 
Signed-off-by: David Woodhouse