With this support kernel can save function call chain log into a
persistent ram buffer that can be decoded and dumped after reboot
through pstore filesystem. It can be used to determine what function
was last called before a reset or panic.

We store the log in a binary format and then decode it at read time.

p.s.
Mostly the code comes from trace_persistent.c driver found in the
Android git tree, written by Colin Cross <ccross@android.com>
(according to sign-off history). I reworked the driver a little bit,
and ported it to pstore.
Signed-off-by: NAnton Vorontsov <anton.vorontsov@linaro.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

For function tracing we need to stop using pstore.buf directly, since
in a tracing callback we can't use spinlocks, and thus we can't safely
use the global buffer.

With write_buf callback, backends no longer need to access pstore.buf
directly, and thus we can pass any buffers (e.g. allocated on stack).
Signed-off-by: NAnton Vorontsov <anton.vorontsov@linaro.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

If tracer->init() fails, current code will leave current_tracer pointing
to an unusable tracer, which at best makes 'current_tracer' report
inaccurate value.

Fix the issue by pointing current_tracer to nop tracer, and only update
current_tracer with the new one after all the initialization succeeds.
Signed-off-by: NAnton Vorontsov <anton.vorontsov@linaro.org>
Acked-by: NSteven Rostedt <rostedt@goodmis.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Nowadays we can use prz->ecc_size as a flag, no need for the special
member in the prz struct.
Signed-off-by: NAnton Vorontsov <anton.vorontsov@linaro.org>
Acked-by: NKees Cook <keescook@chromium.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

This is now pretty straightforward: instead of using bool, just pass
an integer. For backwards compatibility ramoops.ecc=1 means 16 bytes
ECC (using 1 byte for ECC isn't much of use anyway).
Suggested-by: NArve Hjønnevåg <arve@android.com>
Signed-off-by: NAnton Vorontsov <anton.vorontsov@linaro.org>
Acked-by: NKees Cook <keescook@chromium.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

The struct members were never used anywhere outside of
persistent_ram_init_ecc(), so there's actually no need for them
to be in the struct.

If we ever want to make polynomial or symbol size configurable,
it would make more sense to just pass initialized rs_decoder
to the persistent_ram init functions.
Signed-off-by: NAnton Vorontsov <anton.vorontsov@linaro.org>
Acked-by: NKees Cook <keescook@chromium.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Signed-off-by: NJustin P. Mattock <justinmattock@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

with kthread_create we need to call wake_up_process to run the thread,
this can be done using the macro kthread_run, which creates and if thread
creation is succeeded starts the thread by calling wake_up_process,

and also there are two more threads in the rts_pstor, which calls
kthread_run instead calling kthread_create and another call to the
wake_up_process, so with this change the creation of rtsx_scan_thread
will be in consistency with the other control and poll threads.
Signed-off-by: NDevendra Naga <develkernel412222@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

instead we would have used kzalloc, so our memory which is allocated will be set to 0.

codepath:

the code path here is prism2sta_probe_usb, calling when ever usb-dev id
and usb-vendor id e.t.c matches with what ever present in the MODULE_DEVICE_TABLE,

and in prism2sta_probe_usb , we call create_wlan, and its called nowhere else...
Signed-off-by: NDevendra Naga <devendra.aaru@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

err can be used get return status of the  usb_control_msg, rather using
nr and assigning it to err when the function returns error.
Signed-off-by: NDevendra Naga <devendra.aaru@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

All the addi driver ttl subdevices use the range table
'range_digital' provided by the comedi core. The boardinfo
value  'pr_TTLRangeList' is not used by the drivers. Remove
the unused range tables and the boardinfo pointer.

The unused range tables don't make sense anyway...
Signed-off-by: NH Hartley Sweeten <hsweeten@visionengravers.com>
Cc: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

the following fixes...

removed spaces at start of a line and used tabs
Signed-off-by: NDevendra Naga <devendra.aaru@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

this return is at the function end, and function is returning nothing..
i.e a void.
Signed-off-by: NDevendra Naga <devendra.aaru@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

this function seemed bit more coding style fix...

The following fixes:

remove spaces at start of line and use tabs
use space between if and (
give a space in a multiplication operation
use space after = and another variable/constant
Signed-off-by: NDevendra Naga <devendra.aaru@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Opening drivers/staging/wlags49_h2/dhf.h with vim triggered this
warning:
"drivers/staging/wlags49_h2/dhf.h" 226L, 8428C
Error detected while processing modelines:
line    2:
E518: Unknown option: */
Press ENTER or type command to continue

Since the Linux kernel coding style disallows modelines this invalid
modeline can simply be removed. And since we're touching this file we
might as well remove all vim modelines from this driver.

vim tested only.
Signed-off-by: NPaul Bolle <pebolle@tiscali.nl>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Initialize the device when registering it. Sometimes the user access to it
and the device is in an unknown state, so it could fail.
Signed-off-by: NSamuel Iglesias Gonsálvez <siglesias@igalia.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

After opening and closing the file /dev/ipoctal.X.Y.Z for the second time, it
gives a kernel oops due to a dereference of a NULL pointer.

The problem was that tty->driver_data was not properly initialized when
accessing the file for the second time.
Reported-by: NAlberto Garcia Gonzalez <agarcia@igalia.com>
Signed-off-by: NSamuel Iglesias Gonsálvez <siglesias@igalia.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

The macros 'update_dacsr', 'update_adcsr', and 'update_supcsr' all use
the 'devpriv' macro which uses a local variable of a specific name and
yeilds a pointer derived from that name. They are also just wrappers
around simple 'outw' calls. Remove the macros.
Signed-off-by: NH Hartley Sweeten <hsweeten@visionengravers.com>
Cc: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Signed-off-by: NMarek Belisko <marek.belisko@open-nandra.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Signed-off-by: NMarek Belisko <marek.belisko@open-nandra.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Signed-off-by: NMarek Belisko <marek.belisko@open-nandra.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Signed-off-by: NMarek Belisko <marek.belisko@open-nandra.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Signed-off-by: NMarek Belisko <marek.belisko@open-nandra.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Signed-off-by: NMarek Belisko <marek.belisko@open-nandra.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Signed-off-by: NMarek Belisko <marek.belisko@open-nandra.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Signed-off-by: NMarek Belisko <marek.belisko@open-nandra.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

This patch adds the data structures needed for proper registration
of OMAP5 chips. This patch includes definitions for these chip versions:
. OMAP5430
Signed-off-by: NEduardo Valentin <eduardo.valentin@ti.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

This patch adds the data structures needed for proper registration
of OMAP4 chips. This patch includes definitions for these chip versions:
. OMAP4430
. OMAP4460
. OMAP4470
Signed-off-by: NEduardo Valentin <eduardo.valentin@ti.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

This patch has the common thermal framework support for OMAP
bandgap driver. It includes the zone registration and unregistration,
the cpu cooling and the trip definitions.

The trips definition is essentially one trip for passive cooling
using the generic cpu cooling device and another one for thermal
shutdown. The cpu cooling device is built based on the existing
cpu freq table. The build should be agnostic to omap version,
but relies that cpufreq is up and running by the time the driver
registers the cpu cooling, as it relies on the table walk api
from cpufreq.
Signed-off-by: NEduardo Valentin <eduardo.valentin@ti.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

In the System Control Module, OMAP supplies a voltage reference
and a temperature sensor feature that are gathered in the band
gap voltage and temperature sensor (VBGAPTS) module. The band
gap provides current and voltage reference for its internal
circuits and other analog IP blocks. The analog-to-digital
converter (ADC) produces an output value that is proportional
to the silicon temperature.

This patch provides a platform driver which expose this feature.
It is moduled as a MFD child of the System Control Module core
MFD driver.

This driver provides only APIs to access the device properties,
like temperature, thresholds and update rate.
Signed-off-by: NEduardo Valentin <eduardo.valentin@ti.com>
Signed-off-by: NJ Keerthy <j-keerthy@ti.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

-Added pr_fmt.
-Converted printk(KERN_INFO to pr_info
-Removed embedded message prefixes.
Signed-off-by: NToshiaki Yamane <yamanetoshi@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

-Removed unnecessary OOM messages.
-Removed embedded message prefixes.
-Added __func__ to some pr_err messages.
-Converted printk(KERN_ERR to pr_err
-Refactored split printk strings onto a single line
-Removed the space before the '!'.
Signed-off-by: NToshiaki Yamane <yamanetoshi@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Deleted #if 0 blocks
Signed-off-by: NToshiaki Yamane <yamanetoshi@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

the sm7xxfb is a pci device, and should depend on the PCI.
And also if we wont' depend on the PCI sub-system, the following warns
will be triggered,

drivers/staging/sm7xxfb/sm7xxfb.c:1061:1: warning: data definition has no type or storage class [enabled by default]
drivers/staging/sm7xxfb/sm7xxfb.c:1061:1: warning: type defaults to 'int' in declaration of 'module_pci_driver' [-Wimplicit-int]
drivers/staging/sm7xxfb/sm7xxfb.c:1061:1: warning: parameter names (without types) in function declaration [enabled by default]
Reported-by: NFengguang Wu <fengguang.wu@intel.com>
Signed-off-by: NDevendra Naga <devendra.aaru@gmail.com>
Signed-off-by: NRandy Dunlap <rdunlap@xenotime.net>
Cc: Teddy Wang <teddy.wang@siliconmotion.com.cn>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

following warnings were fixed

drivers/staging/gdm72xx/gdm_qos.c:198: ERROR: "foo* bar" should be "foo *bar"
drivers/staging/gdm72xx/gdm_qos.c:198: ERROR: "foo* bar" should be "foo *bar"
drivers/staging/gdm72xx/gdm_qos.c:244: WARNING: quoted string split across lines
Signed-off-by: NDevendra Naga <devendra.aaru@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

in sdio probe function we are doing kmalloc which can be done using kzalloc.
Signed-off-by: NDevendra Naga <devendra.aaru@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

the event sock check is done at the netlink_init itself.
Signed-off-by: NDevendra Naga <devendra.aaru@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

we are doing kmalloc and memset, can be done using kzalloc itself.
Signed-off-by: NDevendra Naga <devendra.aaru@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

return the error of filp_open rather returning -ENOENT.
Signed-off-by: NDevendra Naga <devendra.aaru@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

using a wrapper around SET_ETHTOOL_OPS macro is not actually required,

remove and use SET_ETHTOOL_OPS directly.
Signed-off-by: NDevendra Naga <devendra.aaru@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>