This patch implements read_current_timer using the architected timers
when they are selected via CONFIG_ARM_ARCH_TIMER. If they are detected
not to be usable at runtime, we return -ENXIO to the caller.

Furthermore, if read_current_timer is exported then we can implement
get_cycles in terms of it for use as both an entropy source and for
implementing __udelay and friends.
Tested-by: NShinya Kuribayashi <shinya.kuribayashi.px@renesas.com>
Reviewed-by: NStephen Boyd <sboyd@codeaurora.org>
Signed-off-by: NWill Deacon <will.deacon@arm.com>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

Does block_sigmask() + tracehook_signal_handler();  called when
sigframe has been successfully built.  All architectures converted
to it; block_sigmask() itself is gone now (merged into this one).

I'm still not too happy with the signature, but that's a separate
story (IMO we need a structure that would contain signal number +
siginfo + k_sigaction, so that get_signal_to_deliver() would fill one,
signal_delivered(), handle_signal() and probably setup...frame() -
take one).
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>

Only 3 out of 63 do not.  Renamed the current variant to __set_current_blocked(),
added set_current_blocked() that will exclude unblockable signals, switched
open-coded instances to it.
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>

Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>

replace boilerplate "should we use ->saved_sigmask or ->blocked?"
with calls of obvious inlined helper...
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>

first fruits of ..._restore_sigmask() helpers: now we can take
boilerplate "signal didn't have a handler, clear RESTORE_SIGMASK
and restore the blocked mask from ->saved_mask" into a common
helper.  Open-coded instances switched...
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>

Checking for process->mm is not enough because process' main thread may
exit or detach its mm via use_mm(), but other threads may still have a
valid mm.

To fix this we would need to use find_lock_task_mm(), which would walk up
all threads and returns an appropriate task (with task lock held).

clear_tasks_mm_cpumask() has this issue fixed, so let's use it.
Suggested-by: NOleg Nesterov <oleg@redhat.com>
Signed-off-by: NAnton Vorontsov <anton.vorontsov@linaro.org>
Cc: Russell King <rmk@arm.linux.org.uk>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

The Nomadik GPIO controller now relies on Nomadik pinctrl, however
the pinctrl driver is not currently started by any ux500 platform.
This is requred or GPIOs do not work at all.
Acked-by: NLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: NLee Jones <lee.jones@linaro.org>
Signed-off-by: NArnd Bergmann <arnd@arndb.de>

Here we supply the information required to setup regulators successfully
on Snowball and other db8500 variants which use the ab8500 regulators.
Acked-by: NLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: NLee Jones <lee.jones@linaro.org>
Signed-off-by: NArnd Bergmann <arnd@arndb.de>

This patch adds a fixed regulator for use by the SMSC911x Ethernet
chip driver into the db8500 Device Tree. It also references other
regulators required by the same device.
Acked-by: NLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: NLee Jones <lee.jones@linaro.org>
Signed-off-by: NArnd Bergmann <arnd@arndb.de>

This patch adds the correct compatible string for use during Device Tree
population. Without it the DB8500 PRCMU regulators would be processed
when DT is enabled.
Acked-by: NLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: NLee Jones <lee.jones@linaro.org>
Signed-off-by: NArnd Bergmann <arnd@arndb.de>

Here we inform Device Tree of which regulators are provided by the db8500-
prcmu. This way we can reference some of their consumers directly from the
Device Tree e.g. SMSC911x Ethernet chip.
Acked-by: NLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: NLee Jones <lee.jones@linaro.org>
Signed-off-by: NArnd Bergmann <arnd@arndb.de>

ST-Ericsson uses User Interface Boards to extend functionality of
some of their development boards. However, these aren't compatible
with all the supported boards found in Mainline (Snowball for
instance). This patch ensures that the UIBs are only probed on
boards which can actually support them. This in turn saves lots of
unnecessary error messages normally found in Snowball's boot log.
Acked-by: NLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: NLee Jones <lee.jones@linaro.org>
Signed-off-by: NArnd Bergmann <arnd@arndb.de>

The final piece of the ab8500 puzzle. Here we prevent any of the ab8500-*
drivers from being registered from platform code when Device Tree is
enabled, as we expect DT do probe each of these individually. We also
provide the relevant compatible strings, so that DT knows which nodes
it needs to pay attention to during population.
Acked-by: NLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: NLee Jones <lee.jones@linaro.org>
Signed-off-by: NArnd Bergmann <arnd@arndb.de>

This patch applies the correct format requested by the irq
domain. For chained IRQs which use GPIO lines as IRQs, we
stipulate that a two cell request is required. The first cell
contains the requested IRQ and the second can contain flags
pertaining to edge detection and level sensitive values. The
zeroth cell specifies the GPIO controller by use of a phandle.
Acked-by: NLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: NLee Jones <lee.jones@linaro.org>
Signed-off-by: NArnd Bergmann <arnd@arndb.de>

The patch to disable SMSC911x registration was applied twice in the upstream
kernel by mistake. Git interpreted this as 'take the same entry from a
similar struct' which was close by. This was the wrong thing to do. This patch
rectifies this error and re-enables SMSC911x registration when Device Tree is
not enabled.
Acked-by: NLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: NLee Jones <lee.jones@linaro.org>
Signed-off-by: NArnd Bergmann <arnd@arndb.de>

Apply db8500 related PRCMU Device Tree settings and clean up some formatting
errors. We also remove one of the PRCMU assigned IRQs, as it is currently not
used.
Acked-by: NLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: NLee Jones <lee.jones@linaro.org>
Signed-off-by: NArnd Bergmann <arnd@arndb.de>

Now the DB8500 has Device Tree support it will be probed when the DT
is parsed, rendering the requirement for platform registration void.
This patch removes DB8500 PRCMU platform registration.
Acked-by: NLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: NLee Jones <lee.jones@linaro.org>
Signed-off-by: NArnd Bergmann <arnd@arndb.de>

Now the SCMC911x is correctly enabled in Device Tree, there is no need
to continue registering it from platform code. In fact, if we continue
doing so, the system will throw an error on boot.
Acked-by: NLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: NLee Jones <lee.jones@linaro.org>
Signed-off-by: NArnd Bergmann <arnd@arndb.de>

During Device Tree enablement it is necessary to remove
<hw_component>_add_<device> calls one at at time, as and when particular
devices are DT enabled. This patch provides a temporary solution. Once
the new *of_init_devices function has been fully unpopulated it will be
removed again.
Acked-by: NLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: NLee Jones <lee.jones@linaro.org>
Signed-off-by: NArnd Bergmann <arnd@arndb.de>

During Device Tree enablement it is necessary to remove snowball_<device>*
platform_data segments one at at time, as and when particular devices are
DT enabled. This patch provides a temporary solution. Once this new struct
is empty it will be removed again.
Acked-by: NLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: NLee Jones <lee.jones@linaro.org>
Signed-off-by: NArnd Bergmann <arnd@arndb.de>

Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>

The GPIO devicetree binding in 3.5 doesn't register the various LPC32xx GPIO
banks via DT subnodes but always all at once, and changes the gpio referencing
to 3 cells (bank, gpio, flags). This patch adjusts the DTS files to this
binding that was just accepted to the gpio subsystem.
Signed-off-by: NRoland Stigge <stigge@antcom.de>
Signed-off-by: NOlof Johansson <olof@lixom.net>

In order to keep consistency with other rtc drivers,rename CONFIG_RTC_MXC
to CONFIG_RTC_DRV_MXC.
Signed-off-by: NFabio Estevam <fabio.estevam@freescale.com>
Acked-by: NWolfram Sang <w.sang@pengutronix.de>
Cc: Alessandro Zummo <a.zummo@towertech.it>
[akpm@linux-foundation.org: fix missed arch/arm/configs/imx_v6_v7_defconfig]
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

This function is used by modules (such as the SA1111 PCMCIA driver)
so it needs to be exported.
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

out[bwl]() had a side effect that gcc read-back from the register after
writing its value.  This causes a problem for at least 3c589_cs, which
spits out lots of "adapter failure, FIFO diagnostic register 2011."
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>

Once again, ixp4xx no longer even compiles. This patch fixes the issue
by converting over to gpiolib. This patch was first made by Imre and
posted by Marc, and I added in Russell's suggestion to empty the gpio
header file.

This fix should also go for 3.1, 3.2, 3.3, and 3.4.
Signed-off-by: NRichard Cochran <richardcochran@gmail.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: NArnd Bergmann <arnd@arndb.de>

guts of saved_sigmask-based sigsuspend/rt_sigsuspend.  Takes
kernel sigset_t *.

Open-coded instances replaced with calling it.
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>

Sigh, I missed to check which architecture Kconfig files actually
include the core Kconfig file. There are a few which did not. So we
broke them.

Instead of adding the includes to those, we are better off to move the
include to init/Kconfig like we did already with irqs and others.

This does not change anything for the architectures using the old
style periodic timer mode. It just solves the build wreckage there.

For those architectures which use the clock events infrastructure it
moves the include of the core Kconfig file to "General setup" which is
a way more logical place than having it at random locations specified
by the architecture specific Kconfigs.
Reported-by: NIngo Molnar <mingo@kernel.org>
Cc: Anna-Maria Gleixner <anna-maria@glx-um.de>
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>

There is no point having the NET dependency on the select target, as it
forces all users to depend on NET to tell they support BPF_JIT.  Move
the config option to the bottom of the file - this could be a nice place
also for future "selectable" config symbols.

Fix up all users to drop the dependency on NET now that it is not
required to supress warnings for non-NET builds.
Reported-by: NLinus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: NSam Ravnborg <sam@ravnborg.org>
Acked-by: NDavid Miller <davem@davemloft.net>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>

Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>

Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>

new "syscall start" flag; handled in syscall_trace() by switching
syscall number to that of syscall_restart(2).  Restarts of that
kind (ERESTART_RESTARTBLOCK) are handled by setting that bit;
syscall number is not modified until the actual call.
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>

checking in do_signal() is pointless - if we get there with !user_mode(regs)
(and we might), we'll end up looping indefinitely.  Check in work_pending
and break out of the loop if so.
Acked-by: NRussell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>

get_signal_to_deliver() will handle it itself
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>

Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>

Acked-by: NRussell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>

Acked-by: NRussell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>