Commit graph

3564 commits

Author SHA1 Message Date
Huang Shijie
0730016465 mtd: de-select the chip when it is not used
When we scan several nand chips with nand_scan(), such as
     .......................
      nand_scan(*, 2);
     .......................

In nand_scan_ident(), the maxchips will become 2, so the current code
will select chip 1 to read the device ID. But the chip 0 is still
selected in this case.

To make the logic clear, we'd better de-select the chip when it is not used.

This patch de-select the nand chip if it is not used any more.

Signed-off-by: Huang Shijie <b32955@freescale.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2012-11-18 16:02:31 +02:00
Sachin Kamat
ded4c55d10 mtd: s3c2410: Fix potential NULL pointer dereference error
'set' is tested for NULL. But subsequently accessed without the check.
Thus making it conditional to avoid NULL pointer dereferencing.

Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2012-11-18 12:44:38 +02:00
Jean-Christophe PLAGNIOL-VILLARD
d68cbdd4fb mtd: physmap_of: allow to specify the mtd name for retro compatiblity
linux,mtd-name allow to specify the mtd name for retro capability with
physmap-flash drivers as boot loader pass the mtd partition via the old
device name physmap-flash.

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2012-11-16 10:57:39 +02:00
Prabhakar Kushwaha
d6ba745d0a mtd: fsl_ifc_nand: wait tWB time, poll R/B before command execution
IFC_FIR_OP_CMD0 issues command for execution without checking flash
readiness. It may cause problem if flash is not ready. Instead use
IFC_FIR_OP_CW0 which Wait for tWB time and poll R/B to return high or
time-out, before issuing command.

NAND_CMD_READID command implemention does not fulfill above requirement. So
update its programming.

Signed-off-by: Prabhakar Kushwaha <prabhakar@freescale.com>
Signed-off-by: Hemant Nautiyal <hemant.nautiyal@freescale.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2012-11-16 10:57:39 +02:00
Arnd Bergmann
ca796f8590 mtd: diskonchip: don't warn about ARM architecture
Enabling the diskonchip drivers on most architectures results
in a pointless warning "#warning Unknown architecture for
DiskOnChip. No default probe locations defined". The driver
can in fact handle the default location already through the
CONFIG_MTD_DOCPROBE_ADDRESS, which gets set on the platforms
that need it, and we get a run-time error if this is not
set correctly.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2012-11-16 10:57:38 +02:00
Matthieu CASTET
f251b8dfdd mtd: nand_wait: warn if the nand is busy on exit
This patch allow to detect buggy driver/hardware with
bad RnB (dev_ready) management or when timeout occurs in polling mode.

This works when dev_ready is set or not set.
There are 2 methods to wait for an erase/program command completion:

1. Wait until nand RnB pin goes high (that's what chip->dev_ready usually does)
2. Poll the device: send a status (0x70) command and read status byte in a loop
   until bit NAND_STATUS_READY is set

In all cases, you should send a status command after completion, to check if
the operation was successful. And if the operation completed, the status should
have bit NAND_STATUS_READY set.

Signed-off-by: Matthieu CASTET <matthieu.castet@parrot.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2012-11-15 19:50:30 +02:00
Murali Karicheri
192afdbfbc mtd: davinci: add support for parition binding nodes
Enhance the driver to support partition subnodes inside the nand
device bindings to describe partions on the nand device.

Signed-off-by: Murali Karicheri <m-karicheri2@ti.com>
Reviewed-by: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2012-11-15 19:50:30 +02:00
Huang Shijie
6f9f59ee2e mtd: cmdlinepart: fix the overflow of big mtd partitions
When the kernel parses the following cmdline

	#mtdparts=gpmi-nand:16m(boot),16m(kernel),1g(home),4g(test),-(usr)

for a big nand chip Micron MT29F64G08AFAAAWP(8GB), we got the following wrong
result:

	.............................................
		"mtd: partition size too small (0)"
	.............................................

We can not get any partition.

The "4g(test)" partition triggers a overflow of the "size". The memparse()
returns 4g to the "size", but the size is "unsigned long" type, so a overflow
occurs, the "size" becomes zero in the end.

This patch changes the "size"/"offset" to "unsigned long long" type,
and replaces the UINT_MAX with ULLONG_MAX for macros SIZE_REMAINING and
OFFSET_CONTINUOUS.

Signed-off-by: Huang Shijie <b32955@freescale.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2012-11-15 19:50:30 +02:00
Matthieu CASTET
cd409c6128 mtdoops: don't erase flash at each boot
The current version on mtdoops erase first block of mtdoops partition at each
boot if there is no oops stored in flash. This can wear the flash.

When mtdoops start, find_next_position is called to find the next free entry in
the circular buffer. But if the flash is erased, find_next_position don't find
anything (maxcount == 0xffffffff) and start with the first entry after erasing it.

The scanning that is done in find_next_position already track free/used entries.
So if at the end of the scanning we don't find anything, we can start at the
first entry and erased the entry only if it is marked as used.
Most of this is implemented in mtdoops_inc_counter, so to avoid duplicating
code, if we don't find anything we set position to -1. mtdoops_inc_counter with
increment it, erase the entry if needed and start as before with nextpage = 0
and nextcount = 1).

Also during the scan phase, we use the MTDOOPS_KERNMSG_MAGIC to detect corruped
entries.

Signed-off-by: Matthieu Castet <matthieu.castet@parrot@com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2012-11-15 15:37:51 +02:00
Bastian Hecht
7c8f680e96 mtd: sh_flctl: Add device tree support
The flctl can now be probed via device tree setup in addition to the
existing platform data way.

SoC specific setup data is set in the .data member of the OF match, so
kept within the driver itself, while board/user specific setup - like
partitioning - is taken from the device tree.

Actual configuration is added for the SoC sh7372.

Signed-off-by: Bastian Hecht <hechtb@gmail.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2012-11-15 15:37:50 +02:00
Bastian Hecht
83738d87e3 mtd: sh_flctl: Add DMA capabilty
The code probes if DMA channels can get allocated and tears them down at
removal/failure if needed.
If available it uses them to transfer the data part (not ECC). On
failure we fall back to PIO mode.

Based on Guennadi Liakhovetski's code from the sh_mmcif driver.

Signed-off-by: Bastian Hecht <hechtb@gmail.com>
Reviewed-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2012-11-15 15:37:50 +02:00
Bastian Hecht
e8a9d8f31c mtd: sh_flctl: Minor cleanups
Some small fixes to avoid sparse and smatch complain. Other cosmetic fixes
as well.

- Change of the type of the member index in struct sh_flctl from signed
to unsigned. We use index by addressing array members, so unsigned is more
concise here. Adapt functions relying on sh_flctl::index.
- Remove a blurring cast in write_fiforeg().
- Apply consistent naming scheme when refering to the data buffer.
- Shorten some unnecessarily verbose functions.
- Remove spaces at start of lines.

Signed-off-by: Bastian Hecht <hechtb@gmail.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2012-11-15 15:37:50 +02:00
Huang Shijie
5de0b52ea8 mtd: gpmi: remove unneccessary header
The whole gpmi-nand driver has turned to pure devicetree supported.
So the linux/mtd/gpmi-nand.h is not neccessary now. Just remove it,
and move some macros to the gpmi-nand driver itself.

Signed-off-by: Huang Shijie <shijie8@gmail.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2012-11-15 15:37:50 +02:00
Alexander Shiyan
18afbc54c4 mtd: gpio-nand: Ability to use driver for configurations without RDY-pin
In some configurations of "gpio-nand" RDY-pin may be not connected.
This patch allow to use driver for these configurations. In this case
we are assume that device always ready.

Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2012-11-15 15:37:50 +02:00
Huang Shijie
7483096665 mtd: use the NAND_STATUS_FAIL to replace the hardcode
Use the NAND_STATUS_FAIL to replace the hardcode "0x01",
which make the code more readable.

Signed-off-by: Huang Shijie <shijie8@gmail.com>
Acked-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2012-11-15 15:37:50 +02:00
Vikram Narayanan
04810274a9 mtd: mtd_oobtest: printk -> pr_{info,err,crit}
Use pr_info() and pr_err() while defining pr_fmt(). This saves a few
characters, joins a few lines, and makes the code a little more readable
(and grep-able).

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: Vikram Narayanan <vikram186@gmail.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2012-11-15 15:37:49 +02:00
Vikram Narayanan
95637c3a0e mtd: tests: mtd_torturetest: Replace printk with pr_{info,crit}
Use pr_fmt instead of PRINT_PREF macro

Signed-off-by: Vikram Narayanan <vikram186@gmail.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2012-11-15 15:37:49 +02:00
Vikram Narayanan
cd66a2df7c mtd: tests: mtd_subpagetest: replace printk with pr_{info,crit,err}
Use pr_fmt instead of PRINT_PREF macro

Signed-off-by: Vikram Narayanan <vikram186@gmail.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2012-11-15 15:37:49 +02:00
Vikram Narayanan
2c70d29282 mtd: tests: mtd_speedtest: Replace printk with pr_{info,crit,err}
Use pr_fmt instead of PRINT_PREF macro

Signed-off-by: Vikram Narayanan <vikram186@gmail.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2012-11-15 15:37:49 +02:00
Vikram Narayanan
ae0086cfee mtd: tests: mtd_stresstest: Replace printk with pr_{info,crit,err}
Use pr_fmt instead of PRINT_PREF macro

Signed-off-by: Vikram Narayanan <vikram186@gmail.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2012-11-15 15:37:49 +02:00
Vikram Narayanan
e45048a6a2 mtd: tests: mtd_readtest: Replace printk with pr_{info,err}
Use pr_fmt instead of PRINT_PREF macro

Signed-off-by: Vikram Narayanan <vikram186@gmail.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2012-11-15 15:37:49 +02:00
Vikram Narayanan
bb9984191e mtd: tests: mtd_pagetest: Replace printk with pr_{info,crit,err}
Use pr_fmt instead of PRINT_PREF macro

Signed-off-by: Vikram Narayanan <vikram186@gmail.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2012-11-15 15:37:48 +02:00
Vikram Narayanan
b6489d9706 mtd: tests: mtd_nandecctest: Use pr_fmt macro
Use KBUILD_MODNAME instead of hardcoding the filename

Signed-off-by: Vikram Narayanan <vikram186@gmail.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2012-11-15 15:37:48 +02:00
Vikram Narayanan
600ed67562 mtd: tests: mtd_nandbiterrs: replace msg macro with pr_{info,err}
Use pr_fmt instead of msg macro

Signed-off-by: Vikram Narayanan <vikram186@gmail.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2012-11-15 15:37:48 +02:00
Srinivas Kandagatla
a90019e25e mtd: spear_smi: use module_platform_driver macro
This patch removes some code duplication by using
module_platform_driver.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@st.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2012-11-15 15:37:48 +02:00
Vipin Kumar
a4742d5150 mtd: fsmc_nand: use relaxed variants of io accessors
Use relaxed variants of readl/writel accessors. readl/writel io accessors use
explicit dsb instruction which causes stalls in the processor core resulting
several cycles of delay for each access

Use relaxed variants where ever possible. This also results in an improved
read/write performance.

Signed-off-by: Vipin Kumar <vipin.kumar@st.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2012-11-15 15:37:48 +02:00
Vipin Kumar
928aa2aeb7 mtd: fsmc_nand: modify the wait to uninterruptible
Interruptible wait caused trouble in fsmc hardware state machine if the
application was killed abruptly. To make fsmc operation safe turn wait in to
un-interruptible.

Signed-off-by: Vipin Kumar <vipin.kumar@st.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2012-11-15 15:37:47 +02:00
Vipin Kumar
605add7db6 mtd: fsmc_nand: change the type for regs to void __iomem *
Signed-off-by: Vipin Kumar <vipin.kumar@st.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2012-11-15 15:37:47 +02:00
Jean-Christophe PLAGNIOL-VILLARD
6d7b42a447 mtd: fsmc_nand: pass the ale and cmd resource via resource
Do not use the platform_data to pass resource and be smart in the drivers.
Just pass it via resource

Switch to devm_request_and_ioremap at the sametime

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-By: Vipin Kumar <vipin.kumar@st.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2012-11-15 15:37:47 +02:00
Linus Walleij
fc05d5a30d mtd: delete nomadik_nand driver
The nomadik_nand driver is really just a subset of the FSMC
NAND driver, and there are no users anymore so let's delete
it.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2012-11-15 15:37:47 +02:00
Dinh Nguyen
30f9f2fb7b mtd: denali: add a DT driver
Add a device tree version of the Denali NAND driver. Based
on an original patch from Jamie Iles to add a MMIO version
of this driver.

Signed-off-by: Dinh Nguyen <dinguyen@altera.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2012-11-15 15:37:46 +02:00
Dinh Nguyen
2a0a288ec2 mtd: denali: split the generic driver and PCI layer
The Denali controller can also be found in SoC devices attached to a
simple bus.  Move the PCI specific parts into denali_pci so that we can
add a denali_dt that uses the same driver but for a device tree driver
instead of a PCI based device.

Signed-off-by: Jamie Iles <jamie@jamieiles.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2012-11-15 15:37:46 +02:00
Brian Norris
30fad64325 mtd: fsl_elbc_nand: remove unnecessary badblock_pattern
Since the introduction of nand_create_default_bbt_descr() (now known as
nand_create_badblock_pattern()) in

  commit 58373ff0af

nand_chip.badblock_pattern will be dynamically calculated to the same
1-byte-length pattern that is required by fsl_elbc_nand. This custom
badblock_pattern is no longer needed, then, and its removal may help
facilitate further nand_bbt.c/nand_base.c cleanup in the future (one
down, many to go?)

Anyway, with nand_bbt.c fixed, this effectively reverts:

  commit 452db27243
  [MTD] [NAND] fsl_elbc_nand: fix OOB workability for large page NAND chips

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Cc: Scott Wood <scottwood@freescale.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2012-11-15 15:37:46 +02:00
Sachin Kamat
ecbcbc7b75 mtd: ofpart: Fix incorrect NULL check in parse_ofoldpart_partitions()
The pointer returned by kzalloc should be tested for NULL
to avoid potential NULL pointer dereference later. Incorrect
pointer was being tested for NULL. Bug introduced by commit fbcf62a3
(mtd: physmap_of: move parse_obsolete_partitions to become separate
parser).
This patch fixes this bug.

Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Cc: stable@vger.kernel.org [3.2+]
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2012-11-15 15:37:46 +02:00
Matthieu CASTET
0aa87b7563 mtd: m25p80: add support for the windbond w25q256 chip
Signed-off-by: Matthieu CASTET <matthieu.castet@parrot.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2012-11-15 15:37:46 +02:00
Marek Vasut
12ad2be9d1 mtd: m25p80: Make fast read configurable via DT
Add DT property "m25p,fast-read" that signalises the particular
chip supports "fast read" opcode.

Signed-off-by: Marek Vasut <marex@denx.de>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2012-11-15 15:37:46 +02:00
Vikram Narayanan
2d350e5adb mtd: gpmi-nand: make debug prints more clear
Make the error messages more debugging friendly

Signed-off-by: Vikram Narayanan <vikram186@gmail.com>
Acked-by: Huang Shijie <b32955@freescale.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2012-11-15 15:37:45 +02:00
Shmulik Ladkani
438db5a92b mtd: cmdlinepart: Simplify parse_cmdline_partitions
Simply 'parse_cmdline_partitions': the outer loop iterating over
'partitions' is actually a search loop, it does not execute the inner
loop for each partition, only for the matched partition.

Let's break when search is successful, and move all inner code (relevant
only for the matched partition) outside of the outer loop.

Resulting code is much more readable, and makes the indent level sane.

Signed-off-by: Shmulik Ladkani <shmulik.ladkani@gmail.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2012-11-15 15:37:45 +02:00
Brian Norris
6924d99fcd mtd: nand: fix Samsung SLC detection regression
This patch fixes errors seen in identifying old Samsung SLC, due to the
following commits:

    commit e2d3a35ee4
    mtd: nand: detect Samsung K9GBG08U0A, K9GAG08U0F ID

    commit e3b88bd604
    mtd: nand: add generic READ ID length calculation functions

Some Samsung NAND with "5-byte" ID really appear to have 6-byte IDs, with
wraparound like:

  Samsung K9K8G08U0D
  ec d3 51 95 58 ec ec d3

  Samsung K9F1G08U0C
  ec f1 00 95 40 ec ec f1

  Samsung K9F2G08U0B
  ec da 10 95 44 00 ec da

This bad wraparound makes it hard to reliably detect the difference
between Samsung SLC with 5-byte ID and Samsung SLC with 6-byte ID.

The fix is to, for now, only use the new Samsung table for MLC. We
cannot support the new SLC (K9FAG08U0M) until Samsung gives better ID
decode information.

Note that this applies in addition to the previous regression fix:

    commit bc86cf7af2
    mtd: nand: fix Samsung SLC NAND identification regression

Together, these patches completely restore the previous detection
behavior so that we cannot see any more regressions in Samsung SLC NAND
(finger crossed). With luck, I can get a hold of a Samsung
representative and stop having to cross my fingers eventually.

Reported-by: Sylwester Nawrocki <sylvester.nawrocki@gmail.com>
Tested-by: Sylwester Nawrocki <sylvester.nawrocki@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2012-11-15 15:37:43 +02:00
Brian Norris
af451af4e0 mtd: nand: fix Samsung SLC NAND identification regression
A combination of the following two commits caused a regression in 3.7-rc1
when identifying some Samsung NAND, so that some previously working NAND
were no longer detected properly:

    commit e3b88bd604
    mtd: nand: add generic READ ID length calculation functions

    commit e2d3a35ee4
    mtd: nand: detect Samsung K9GBG08U0A, K9GAG08U0F ID

Particularly, a regression was seen on Samsung K9F2G08U0B, with the
following full 8-byte READ ID string:

    ec da 10 95 44 00 ec da

The basic problem is that Samsung manufactures both SLC and MLC NAND
that use a non-standard decoding table for deriving information from
their IDs. I have heuristically determined that all the chips that use
the new table have ID strings which wrap around after the 6th byte.
Unfortunately, I overlooked the fact that some older Samsung SLC (which
use a different decoding table) have "5 byte ID strings" which also wrap
around after the 6th byte.

This patch re-introduces a distinction between these old and new Samsung
NAND by checking that the 6th byte is non-zero, allowing both old and
new Samsung NAND to be detected properly.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Tested-by: Brian Norris <computersforpeace@gmail.com>
Reported-by: Marek Vasut <marex@denx.de>
Tested-by: Marek Vasut <marex@denx.de>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2012-11-15 15:37:16 +02:00
Sachin Kamat
0131950ebd mtd: onenand: Make flexonenand_set_boundary static
Fixes the following sparse warning:
drivers/mtd/onenand/onenand_base.c:3697:5: warning:
symbol 'flexonenand_set_boundary' was not declared. Should it be static?

Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Acked-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2012-11-09 17:02:50 +02:00
Jiri Engelthaler
c36a7ff457 mtd: slram: invalid checking of absolute end address
Fixed parsing end absolute address.

Signed-off-by: Jiri Engelthaler <engycz@gmail.com>
Cc: stable@vger.kernel.org
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2012-11-09 17:02:50 +02:00
David Woodhouse
f5cf8f0742 mtd: Disable mtdchar mmap on MMU systems
This code was broken because it assumed that all MTD devices were map-based.
Disable it for now, until it can be fixed properly for the next merge window.

Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2012-10-09 15:08:42 +01:00
David Woodhouse
ffe3150125 UAPI Disintegration 2012-10-09
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Merge tag 'disintegrate-mtd-20121009' of git://git.infradead.org/users/dhowells/linux-headers

UAPI Disintegration 2012-10-09

Conflicts:
	MAINTAINERS
	arch/arm/configs/bcmring_defconfig
	arch/arm/mach-imx/clk-imx51-imx53.c
	drivers/mtd/nand/Kconfig
	drivers/mtd/nand/bcm_umi_nand.c
	drivers/mtd/nand/nand_bcm_umi.h
	drivers/mtd/nand/orion_nand.c
2012-10-09 15:04:25 +01:00
Konstantin Khlebnikov
314e51b985 mm: kill vma flag VM_RESERVED and mm->reserved_vm counter
A long time ago, in v2.4, VM_RESERVED kept swapout process off VMA,
currently it lost original meaning but still has some effects:

 | effect                 | alternative flags
-+------------------------+---------------------------------------------
1| account as reserved_vm | VM_IO
2| skip in core dump      | VM_IO, VM_DONTDUMP
3| do not merge or expand | VM_IO, VM_DONTEXPAND, VM_HUGETLB, VM_PFNMAP
4| do not mlock           | VM_IO, VM_DONTEXPAND, VM_HUGETLB, VM_PFNMAP

This patch removes reserved_vm counter from mm_struct.  Seems like nobody
cares about it, it does not exported into userspace directly, it only
reduces total_vm showed in proc.

Thus VM_RESERVED can be replaced with VM_IO or pair VM_DONTEXPAND | VM_DONTDUMP.

remap_pfn_range() and io_remap_pfn_range() set VM_IO|VM_DONTEXPAND|VM_DONTDUMP.
remap_vmalloc_range() set VM_DONTEXPAND | VM_DONTDUMP.

[akpm@linux-foundation.org: drivers/vfio/pci/vfio_pci.c fixup]
Signed-off-by: Konstantin Khlebnikov <khlebnikov@openvz.org>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Carsten Otte <cotte@de.ibm.com>
Cc: Chris Metcalf <cmetcalf@tilera.com>
Cc: Cyrill Gorcunov <gorcunov@openvz.org>
Cc: Eric Paris <eparis@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Morris <james.l.morris@oracle.com>
Cc: Jason Baron <jbaron@redhat.com>
Cc: Kentaro Takeda <takedakn@nttdata.co.jp>
Cc: Matt Helsley <matthltc@us.ibm.com>
Cc: Nick Piggin <npiggin@kernel.dk>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Robert Richter <robert.richter@amd.com>
Cc: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Cc: Venkatesh Pallipadi <venki@google.com>
Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-10-09 16:22:19 +09:00
Rik van Riel
c654345924 mm: remove __GFP_NO_KSWAPD
When transparent huge pages were introduced, memory compaction and swap
storms were an issue, and the kernel had to be careful to not make THP
allocations cause pageout or compaction.

Now that we have working compaction deferral, kswapd is smart enough to
invoke compaction and the quadratic behaviour around isolate_free_pages
has been fixed, it should be safe to remove __GFP_NO_KSWAPD.

[minchan@kernel.org: Comment fix]
[mgorman@suse.de: Avoid direct reclaim for deferred compaction]
Cc: Andrea Arcangeli <aarcange@redhat.com>
Signed-off-by: Rik van Riel <riel@redhat.com>
Signed-off-by: Mel Gorman <mgorman@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-10-09 16:22:15 +09:00
Linus Torvalds
e9eca4de95 This pull request contains the UBI fastmap support implemented by Richard
Weinberger from Linutronix. Fastmap is designed to address UBI's slow scanning
 issues. Namely, it introduces a new on-flash data-structure called "fastmap",
 which stores the information about logical<->physical eraseblocks mappings.
 So now to get this information just read the fastmap, instead of doing full
 scan. More information here can be found in Richard's announcement in LKML
 (Subject: UBI: Fastmap request for inclusion (v19)):
 
 http://thread.gmane.org/gmane.linux.kernel/1364922/focus=1369109
 
 One thing I want to explicitly say is that fastmap did not have large
 enough linux-next exposure. It is partially my fault - I did not respond
 quickly enough. I _really_ apologize for this. But it had good testing and
 disabled by default, so I do not expect that we'll break anything.
 
 Fastmap is declared as experimental so far, and it is off by default. We
 did declare that the on-flash format may be changed. The reason for this is
 that no one used it in real production so far, so there is a high risk that
 something is missing. Besides, we do not have user-space tools supporting
 fastmap so far.
 
 Nevertheless, I suggest we merge this feature. Many people want UBI's scanning
 bottleneck to be fixed and merging fastmap now should accelerate its production
 use. The plan is to make it bullet-prove, somewhat clean-up, and make it the
 default for UBI. I do not know how many kernel releases will it take.
 
 Basically, I what I want to do for fastmap is something like Linus did for
 btrfs few years ago.
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Merge tag 'upstream-3.7-rc1-fastmap' of git://git.infradead.org/linux-ubi

Pull UBI fastmap changes from Artem Bityutskiy:
 "This pull request contains the UBI fastmap support implemented by
  Richard Weinberger from Linutronix.  Fastmap is designed to address
  UBI's slow scanning issues.  Namely, it introduces a new on-flash
  data-structure called "fastmap", which stores the information about
  logical<->physical eraseblocks mappings.  So now to get this
  information just read the fastmap, instead of doing full scan.  More
  information here can be found in Richard's announcement in LKML
  (Subject: UBI: Fastmap request for inclusion (v19)):

     http://thread.gmane.org/gmane.linux.kernel/1364922/focus=1369109

  One thing I want to explicitly say is that fastmap did not have large
  enough linux-next exposure.  It is partially my fault - I did not
  respond quickly enough.  I _really_ apologize for this.  But it had
  good testing and disabled by default, so I do not expect that we'll
  break anything.

  Fastmap is declared as experimental so far, and it is off by default.
  We did declare that the on-flash format may be changed.  The reason
  for this is that no one used it in real production so far, so there is
  a high risk that something is missing.  Besides, we do not have
  user-space tools supporting fastmap so far.

  Nevertheless, I suggest we merge this feature.  Many people want UBI's
  scanning bottleneck to be fixed and merging fastmap now should
  accelerate its production use.  The plan is to make it bullet-prove,
  somewhat clean-up, and make it the default for UBI.  I do not know how
  many kernel releases will it take.

  Basically, I what I want to do for fastmap is something like Linus did
  for btrfs few years ago."

* tag 'upstream-3.7-rc1-fastmap' of git://git.infradead.org/linux-ubi:
  UBI: Wire-up fastmap
  UBI: Add fastmap core
  UBI: Add fastmap support to the WL sub-system
  UBI: Add fastmap stuff to attach.c
  UBI: Wire-up ->fm_sem
  UBI: Add fastmap bits to build.c
  UBI: Add self_check_eba()
  UBI: Export next_sqnum()
  UBI: Add fastmap stuff to ubi.h
  UBI: Add fastmap on-flash data structures
2012-10-08 20:40:45 +09:00
Linus Torvalds
5f3d2f2e1a Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc
Pull powerpc updates from Benjamin Herrenschmidt:
 "Some highlights in addition to the usual batch of fixes:

   - 64TB address space support for 64-bit processes by Aneesh Kumar

   - Gavin Shan did a major cleanup & re-organization of our EEH support
     code (IBM fancy PCI error handling & recovery infrastructure) which
     paves the way for supporting different platform backends, along
     with some rework of the PCIe code for the PowerNV platform in order
     to remove home made resource allocations and instead use the
     generic code (which is possible after some small improvements to it
     done by Gavin).

   - Uprobes support by Ananth N Mavinakayanahalli

   - A pile of embedded updates from Freescale folks, including new SoC
     and board supports, more KVM stuff including preparing for 64-bit
     BookE KVM support, ePAPR 1.1 updates, etc..."

Fixup trivial conflicts in drivers/scsi/ipr.c

* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: (146 commits)
  powerpc/iommu: Fix multiple issues with IOMMU pools code
  powerpc: Fix VMX fix for memcpy case
  driver/mtd:IFC NAND:Initialise internal SRAM before any write
  powerpc/fsl-pci: use 'Header Type' to identify PCIE mode
  powerpc/eeh: Don't release eeh_mutex in eeh_phb_pe_get
  powerpc: Remove tlb batching hack for nighthawk
  powerpc: Set paca->data_offset = 0 for boot cpu
  powerpc/perf: Sample only if SIAR-Valid bit is set in P7+
  powerpc/fsl-pci: fix warning when CONFIG_SWIOTLB is disabled
  powerpc/mpc85xx: Update interrupt handling for IFC controller
  powerpc/85xx: Enable USB support in p1023rds_defconfig
  powerpc/smp: Do not disable IPI interrupts during suspend
  powerpc/eeh: Fix crash on converting OF node to edev
  powerpc/eeh: Lock module while handling EEH event
  powerpc/kprobe: Don't emulate store when kprobe stwu r1
  powerpc/kprobe: Complete kprobe and migrate exception frame
  powerpc/kprobe: Introduce a new thread flag
  powerpc: Remove unused __get_user64() and __put_user64()
  powerpc/eeh: Global mutex to protect PE tree
  powerpc/eeh: Remove EEH PE for normal PCI hotplug
  ...
2012-10-06 03:16:12 +09:00
Richard Weinberger
76ac66e469 UBI: Wire-up fastmap
Make fastmap known to Kconfig, UBI Makefile and MAINTAINERS.

Signed-off-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2012-10-03 16:39:37 +03:00
Richard Weinberger
dbb7d2a88d UBI: Add fastmap core
Signed-off-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2012-10-03 16:39:27 +03:00