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415 commits

Author SHA1 Message Date
Michal Simek
9afc416517 Revert "microblaze: Add topology init"
This reverts commit d761f0c521.

Patch: "cpu: Register a generic CPU device on architectures that currently do not"
(sha1: 9f13a1fd45)

selects GENERIC_CPU_DEVICES for Microblaze which register cpu.
My patch was done in the same time that's why cpu was registered twice which
caused this warning log:

------------[ cut here ]------------
WARNING: at fs/sysfs/dir.c:481 sysfs_add_one+0xb0/0xdc()
sysfs: cannot create duplicate filename '/devices/system/cpu/cpu0'
Modules linked in:
...

Signed-off-by: Michal Simek <monstr@monstr.eu>
2012-01-31 09:06:52 +01:00
Linus Torvalds
f429ee3b80 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/audit
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/audit: (29 commits)
  audit: no leading space in audit_log_d_path prefix
  audit: treat s_id as an untrusted string
  audit: fix signedness bug in audit_log_execve_info()
  audit: comparison on interprocess fields
  audit: implement all object interfield comparisons
  audit: allow interfield comparison between gid and ogid
  audit: complex interfield comparison helper
  audit: allow interfield comparison in audit rules
  Kernel: Audit Support For The ARM Platform
  audit: do not call audit_getname on error
  audit: only allow tasks to set their loginuid if it is -1
  audit: remove task argument to audit_set_loginuid
  audit: allow audit matching on inode gid
  audit: allow matching on obj_uid
  audit: remove audit_finish_fork as it can't be called
  audit: reject entry,always rules
  audit: inline audit_free to simplify the look of generic code
  audit: drop audit_set_macxattr as it doesn't do anything
  audit: inline checks for not needing to collect aux records
  audit: drop some potentially inadvisable likely notations
  ...

Use evil merge to fix up grammar mistakes in Kconfig file.

Bad speling and horrible grammar (and copious swearing) is to be
expected, but let's keep it to commit messages and comments, rather than
expose it to users in config help texts or printouts.
2012-01-17 16:41:31 -08:00
Eric Paris
b05d8447e7 audit: inline audit_syscall_entry to reduce burden on archs
Every arch calls:

if (unlikely(current->audit_context))
	audit_syscall_entry()

which requires knowledge about audit (the existance of audit_context) in
the arch code.  Just do it all in static inline in audit.h so that arch's
can remain blissfully ignorant.

Signed-off-by: Eric Paris <eparis@redhat.com>
2012-01-17 16:16:56 -05:00
Eric Paris
d7e7528bcd Audit: push audit success and retcode into arch ptrace.h
The audit system previously expected arches calling to audit_syscall_exit to
supply as arguments if the syscall was a success and what the return code was.
Audit also provides a helper AUDITSC_RESULT which was supposed to simplify things
by converting from negative retcodes to an audit internal magic value stating
success or failure.  This helper was wrong and could indicate that a valid
pointer returned to userspace was a failed syscall.  The fix is to fix the
layering foolishness.  We now pass audit_syscall_exit a struct pt_reg and it
in turns calls back into arch code to collect the return value and to
determine if the syscall was a success or failure.  We also define a generic
is_syscall_success() macro which determines success/failure based on if the
value is < -MAX_ERRNO.  This works for arches like x86 which do not use a
separate mechanism to indicate syscall failure.

We make both the is_syscall_success() and regs_return_value() static inlines
instead of macros.  The reason is because the audit function must take a void*
for the regs.  (uml calls theirs struct uml_pt_regs instead of just struct
pt_regs so audit_syscall_exit can't take a struct pt_regs).  Since the audit
function takes a void* we need to use static inlines to cast it back to the
arch correct structure to dereference it.

The other major change is that on some arches, like ia64, MIPS and ppc, we
change regs_return_value() to give us the negative value on syscall failure.
THE only other user of this macro, kretprobe_example.c, won't notice and it
makes the value signed consistently for the audit functions across all archs.

In arch/sh/kernel/ptrace_64.c I see that we were using regs[9] in the old
audit code as the return value.  But the ptrace_64.h code defined the macro
regs_return_value() as regs[3].  I have no idea which one is correct, but this
patch now uses the regs_return_value() function, so it now uses regs[3].

For powerpc we previously used regs->result but now use the
regs_return_value() function which uses regs->gprs[3].  regs->gprs[3] is
always positive so the regs_return_value(), much like ia64 makes it negative
before calling the audit code when appropriate.

Signed-off-by: Eric Paris <eparis@redhat.com>
Acked-by: H. Peter Anvin <hpa@zytor.com> [for x86 portion]
Acked-by: Tony Luck <tony.luck@intel.com> [for ia64]
Acked-by: Richard Weinberger <richard@nod.at> [for uml]
Acked-by: David S. Miller <davem@davemloft.net> [for sparc]
Acked-by: Ralf Baechle <ralf@linux-mips.org> [for mips]
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> [for ppc]
2012-01-17 16:16:56 -05:00
Michal Simek
d761f0c521 microblaze: Add topology init
Init topology subsystem by cpu registration.

Microblaze Linux kernel is fauling by
"Oops: kernel access of bad area, sig: 11"
because cpu is not initialized.

Signed-off-by: Michal Simek <monstr@monstr.eu>
2012-01-11 09:20:55 +01:00
Linus Torvalds
4690dfa8cd Merge branch 'next' of git://git.monstr.eu/linux-2.6-microblaze
* 'next' of git://git.monstr.eu/linux-2.6-microblaze:
  microblaze: Wire-up new system calls
  microblaze: Remove NO_IRQ from architecture
  input: xilinx_ps2: Don't use NO_IRQ
  block: xsysace: Don't use NO_IRQ
  microblaze: Trivial asm fix
  microblaze: Fix debug message in module
  microblaze: Remove eprintk macro
  microblaze: Send CR before LF for early console
  microblaze: Change NO_IRQ to 0
  microblaze: Use irq_of_parse_and_map for timer
  microblaze: intc: Change variable name
  microblaze: Use of_find_compatible_node for timer and intc
  microblaze: Add __cmpdi2
  microblaze: Synchronize __pa __va macros
2012-01-10 17:37:49 -08:00
Linus Torvalds
fbce1c234f Changes queued in gpio/next for the start of the 3.3 merge window
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Merge tag 'gpio-for-linus' of git://git.secretlab.ca/git/linux-2.6

Changes queued in gpio/next for the start of the 3.3 merge window

* tag 'gpio-for-linus-20120104' of git://git.secretlab.ca/git/linux-2.6:
  gpio: Add decode of WM8994 GPIO configuration
  gpio: Convert GPIO drivers to module_platform_driver
  gpio: Fix typo in comment in Samsung driver
  gpio: Explicitly index samsung_gpio_cfgs
  gpio: Add Linus Walleij as gpio co-maintainer
  of: Add device tree selftests
  of: create of_phandle_args to simplify return of phandle parsing data
  gpio/powerpc: Eliminate duplication of of_get_named_gpio_flags()
  gpio/microblaze: Eliminate duplication of of_get_named_gpio_flags()
  gpiolib: output basic details and consolidate gpio device drivers
  pch_gpio: Change company name OKI SEMICONDUCTOR to LAPIS Semiconductor
  pch_gpio: Support new device LAPIS Semiconductor ML7831 IOH
  spi/pl022: make the chip deselect handling thread safe
  spi/pl022: add support for pm_runtime autosuspend
  spi/pl022: disable the PL022 block when unused
  spi/pl022: move device disable to workqueue thread
  spi/pl022: skip default configuration before suspending
  spi/pl022: fix build warnings
  spi/pl022: only enable RX interrupts when TX is complete
2012-01-07 12:15:36 -08:00
Linus Torvalds
423d091dfe Merge branch 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
* 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (64 commits)
  cpu: Export cpu_up()
  rcu: Apply ACCESS_ONCE() to rcu_boost() return value
  Revert "rcu: Permit rt_mutex_unlock() with irqs disabled"
  docs: Additional LWN links to RCU API
  rcu: Augment rcu_batch_end tracing for idle and callback state
  rcu: Add rcutorture tests for srcu_read_lock_raw()
  rcu: Make rcutorture test for hotpluggability before offlining CPUs
  driver-core/cpu: Expose hotpluggability to the rest of the kernel
  rcu: Remove redundant rcu_cpu_stall_suppress declaration
  rcu: Adaptive dyntick-idle preparation
  rcu: Keep invoking callbacks if CPU otherwise idle
  rcu: Irq nesting is always 0 on rcu_enter_idle_common
  rcu: Don't check irq nesting from rcu idle entry/exit
  rcu: Permit dyntick-idle with callbacks pending
  rcu: Document same-context read-side constraints
  rcu: Identify dyntick-idle CPUs on first force_quiescent_state() pass
  rcu: Remove dynticks false positives and RCU failures
  rcu: Reduce latency of rcu_prepare_for_idle()
  rcu: Eliminate RCU_FAST_NO_HZ grace-period hang
  rcu: Avoid needlessly IPIing CPUs at GP end
  ...
2012-01-06 08:02:40 -08:00
Michal Simek
f3aef2510e microblaze: Wire-up new system calls
Wire up three system calls
sendmmsg/process_vm_readv/process_vm_writev

All tested by testing apps.
Look at:
net: Add sendmmsg socket system call
(sha1: 228e548e60)
Cross Memory Attach
(sha1: fcf634098c)

Signed-off-by: Michal Simek <monstr@monstr.eu>
2012-01-05 11:16:51 +01:00
Michal Simek
5dbeaad3ea microblaze: Trivial asm fix
Just replace one dot with comma. New binutils can detect it.

Signed-off-by: Michal Simek <monstr@monstr.eu>
2012-01-05 08:34:28 +01:00
Michal Simek
f5b778bee6 microblaze: Fix debug message in module
Trivial fix.

Signed-off-by: Michal Simek <monstr@monstr.eu>
2012-01-05 08:34:27 +01:00
Michal Simek
b6d5b28e44 microblaze: Remove eprintk macro
eprintk macro was used for printing early_printk
messages. Early console registration was changed
that's why this is not needed.

Signed-off-by: Michal Simek <monstr@monstr.eu>
2012-01-05 08:34:26 +01:00
Michal Simek
a8c2e555b0 microblaze: Send CR before LF for early console
This patch fixes problem with measuring tools.

Signed-off-by: Michal Simek <monstr@monstr.eu>
2012-01-05 08:34:25 +01:00
Michal Simek
6c7a2676f5 microblaze: Change NO_IRQ to 0
As has been discussed many times[1], Using NO_IRQ set to anything other
than 0 is bug waiting to happen since many drivers follow the pattern
"if (!irq)" for testing whether or not an irq has been set.

This patch changes the Microblaze NO_IRQ setting from -1 to 0 to bring
it in line with most of the rest of the kernel.  It also prepares for
Microblaze eventually supporting multiple interrupt controllers by
breaking the assumption that hwirq# == Linux IRQ#.  The Linux IRQ
number is just a cookie with no guarantee of a direct relationship
with the hardware irq arrangement.

At this point, Microblaze interrupt handling only supports only one
instance of one kind of interrupt controller (xilinx_intc).  This change
shouldn't affect any architecture code outside of the interrupt
controller driver and the irq_of mapping.

Updated to 3.2 and to use irq_data.hwirq by Rob Herring.
Tested and fixed by Michal Simek.

[1] http://lkml.org/lkml/2005/11/21/221

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Signed-off-by: Michal Simek <monstr@monstr.eu>
2012-01-05 08:29:13 +01:00
Michal Simek
9d0ced0084 microblaze: Use irq_of_parse_and_map for timer
It is necessary to call generic function for irq finding.
The main reason is that this generic function calls irq_create_of_mapping
which can add some shift because of NO_IRQ.

Signed-off-by: Michal Simek <monstr@monstr.eu>
2012-01-05 08:22:04 +01:00
Michal Simek
2ecb899b4e microblaze: intc: Change variable name
intr_type is mask - change name.
s/intr_type/intr_mask/g

Signed-off-by: Michal Simek <monstr@monstr.eu>
2012-01-05 08:22:02 +01:00
Michal Simek
5a26cd69cc microblaze: Use of_find_compatible_node for timer and intc
Calling of_find_compatible_node instead of calling private code
which does the same.

Signed-off-by: Michal Simek <monstr@monstr.eu>
2012-01-05 08:22:01 +01:00
Grant Likely
fe9f68449a gpio/microblaze: Eliminate duplication of of_get_named_gpio_flags()
of_reset_gpio_handle() is largely a cut-and-paste copy of
of_get_named_gpio_flags(). There really isn't any reason for the
split, so this patch deletes the duplicate function

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Cc: Michal Simek <monstr@monstr.eu>
2011-12-12 13:40:16 -07:00
Frederic Weisbecker
1268fbc746 nohz: Remove tick_nohz_idle_enter_norcu() / tick_nohz_idle_exit_norcu()
Those two APIs were provided to optimize the calls of
tick_nohz_idle_enter() and rcu_idle_enter() into a single
irq disabled section. This way no interrupt happening in-between would
needlessly process any RCU job.

Now we are talking about an optimization for which benefits
have yet to be measured. Let's start simple and completely decouple
idle rcu and dyntick idle logics to simplify.

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
2011-12-11 10:31:57 -08:00
Frederic Weisbecker
2bbb6817c0 nohz: Allow rcu extended quiescent state handling seperately from tick stop
It is assumed that rcu won't be used once we switch to tickless
mode and until we restart the tick. However this is not always
true, as in x86-64 where we dereference the idle notifiers after
the tick is stopped.

To prepare for fixing this, add two new APIs:
tick_nohz_idle_enter_norcu() and tick_nohz_idle_exit_norcu().

If no use of RCU is made in the idle loop between
tick_nohz_enter_idle() and tick_nohz_exit_idle() calls, the arch
must instead call the new *_norcu() version such that the arch doesn't
need to call rcu_idle_enter() and rcu_idle_exit().

Otherwise the arch must call tick_nohz_enter_idle() and
tick_nohz_exit_idle() and also call explicitly:

- rcu_idle_enter() after its last use of RCU before the CPU is put
to sleep.
- rcu_idle_exit() before the first use of RCU after the CPU is woken
up.

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Frysinger <vapier@gentoo.org>
Cc: Guan Xuetao <gxt@mprc.pku.edu.cn>
Cc: David Miller <davem@davemloft.net>
Cc: Chris Metcalf <cmetcalf@tilera.com>
Cc: Hans-Christian Egtvedt <hans-christian.egtvedt@atmel.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Paul Mundt <lethal@linux-sh.org>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
2011-12-11 10:31:36 -08:00
Frederic Weisbecker
280f06774a nohz: Separate out irq exit and idle loop dyntick logic
The tick_nohz_stop_sched_tick() function, which tries to delay
the next timer tick as long as possible, can be called from two
places:

- From the idle loop to start the dytick idle mode
- From interrupt exit if we have interrupted the dyntick
idle mode, so that we reprogram the next tick event in
case the irq changed some internal state that requires this
action.

There are only few minor differences between both that
are handled by that function, driven by the ts->inidle
cpu variable and the inidle parameter. The whole guarantees
that we only update the dyntick mode on irq exit if we actually
interrupted the dyntick idle mode, and that we enter in RCU extended
quiescent state from idle loop entry only.

Split this function into:

- tick_nohz_idle_enter(), which sets ts->inidle to 1, enters
dynticks idle mode unconditionally if it can, and enters into RCU
extended quiescent state.

- tick_nohz_irq_exit() which only updates the dynticks idle mode
when ts->inidle is set (ie: if tick_nohz_idle_enter() has been called).

To maintain symmetry, tick_nohz_restart_sched_tick() has been renamed
into tick_nohz_idle_exit().

This simplifies the code and micro-optimize the irq exit path (no need
for local_irq_save there). This also prepares for the split between
dynticks and rcu extended quiescent state logics. We'll need this split to
further fix illegal uses of RCU in extended quiescent states in the idle
loop.

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Frysinger <vapier@gentoo.org>
Cc: Guan Xuetao <gxt@mprc.pku.edu.cn>
Cc: David Miller <davem@davemloft.net>
Cc: Chris Metcalf <cmetcalf@tilera.com>
Cc: Hans-Christian Egtvedt <hans-christian.egtvedt@atmel.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Paul Mundt <lethal@linux-sh.org>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
2011-12-11 10:31:35 -08:00
Tejun Heo
1aadc0560f memblock: s/memblock_analyze()/memblock_allow_resize()/ and update users
The only function of memblock_analyze() is now allowing resize of
memblock region arrays.  Rename it to memblock_allow_resize() and
update its users.

* The following users remain the same other than renaming.

  arm/mm/init.c::arm_memblock_init()
  microblaze/kernel/prom.c::early_init_devtree()
  powerpc/kernel/prom.c::early_init_devtree()
  openrisc/kernel/prom.c::early_init_devtree()
  sh/mm/init.c::paging_init()
  sparc/mm/init_64.c::paging_init()
  unicore32/mm/init.c::uc32_memblock_init()

* In the following users, analyze was used to update total size which
  is no longer necessary.

  powerpc/kernel/machine_kexec.c::reserve_crashkernel()
  powerpc/kernel/prom.c::early_init_devtree()
  powerpc/mm/init_32.c::MMU_init()
  powerpc/mm/tlb_nohash.c::__early_init_mmu()  
  powerpc/platforms/ps3/mm.c::ps3_mm_add_memory()
  powerpc/platforms/embedded6xx/wii.c::wii_memory_fixups()
  sh/kernel/machine_kexec.c::reserve_crashkernel()

* x86/kernel/e820.c::memblock_x86_fill() was directly setting
  memblock_can_resize before populating memblock and calling analyze
  afterwards.  Call memblock_allow_resize() before start populating.

memblock_can_resize is now static inside memblock.c.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Michal Simek <monstr@monstr.eu>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Guan Xuetao <gxt@mprc.pku.edu.cn>
Cc: "H. Peter Anvin" <hpa@zytor.com>
2011-12-08 10:22:08 -08:00
Tejun Heo
fe091c208a memblock: Kill memblock_init()
memblock_init() initializes arrays for regions and memblock itself;
however, all these can be done with struct initializers and
memblock_init() can be removed.  This patch kills memblock_init() and
initializes memblock with struct initializer.

The only difference is that the first dummy entries don't have .nid
set to MAX_NUMNODES initially.  This doesn't cause any behavior
difference.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Michal Simek <monstr@monstr.eu>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Guan Xuetao <gxt@mprc.pku.edu.cn>
Cc: "H. Peter Anvin" <hpa@zytor.com>
2011-12-08 10:22:07 -08:00
Linus Torvalds
32aaeffbd4 Merge branch 'modsplit-Oct31_2011' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux
* 'modsplit-Oct31_2011' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux: (230 commits)
  Revert "tracing: Include module.h in define_trace.h"
  irq: don't put module.h into irq.h for tracking irqgen modules.
  bluetooth: macroize two small inlines to avoid module.h
  ip_vs.h: fix implicit use of module_get/module_put from module.h
  nf_conntrack.h: fix up fallout from implicit moduleparam.h presence
  include: replace linux/module.h with "struct module" wherever possible
  include: convert various register fcns to macros to avoid include chaining
  crypto.h: remove unused crypto_tfm_alg_modname() inline
  uwb.h: fix implicit use of asm/page.h for PAGE_SIZE
  pm_runtime.h: explicitly requires notifier.h
  linux/dmaengine.h: fix implicit use of bitmap.h and asm/page.h
  miscdevice.h: fix up implicit use of lists and types
  stop_machine.h: fix implicit use of smp.h for smp_processor_id
  of: fix implicit use of errno.h in include/linux/of.h
  of_platform.h: delete needless include <linux/module.h>
  acpi: remove module.h include from platform/aclinux.h
  miscdevice.h: delete unnecessary inclusion of module.h
  device_cgroup.h: delete needless include <linux/module.h>
  net: sch_generic remove redundant use of <linux/module.h>
  net: inet_timewait_sock doesnt need <linux/module.h>
  ...

Fix up trivial conflicts (other header files, and  removal of the ab3550 mfd driver) in
 - drivers/media/dvb/frontends/dibx000_common.c
 - drivers/media/video/{mt9m111.c,ov6650.c}
 - drivers/mfd/ab3550-core.c
 - include/linux/dmaengine.h
2011-11-06 19:44:47 -08:00
Paul Gortmaker
66421a648d microblaze: Add export.h to arch/microblaze files as required
For access to the EXPORT_SYMBOL variants and THIS_MODULE macros.

Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
2011-10-31 19:31:06 -04:00
Peter Zijlstra
84ac218f02 microblaze: Remove __ARCH_WANT_INTERRUPTS_ON_CTXSW usage
As far as I can tell the only reason microblaze has
__ARCH_WANT_INTERRUPTS_ON_CTXSW is because it initializes new task state
with interrupts enabled so that on switch_to() interrupts get enabled.

So change copy_thread() to clear MSR_IE instead of set it, this will
ensure switch_to() will always keep IRQs disabled.

The scheduler will disable IRQs when taking rq->lock in schedule() and
enable IRQs in finish_lock_switch() after its done its magic.

This leaves ARM the only __ARCH_WANT_INTERRUPTS_ON_CTXSW user.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Michal Simek <monstr@monstr.eu>
2011-10-14 12:28:42 +02:00
Edgar E. Iglesias
15ec090833 microblaze: Raise SIGFPE/FPE_INTDIV for div by zero
It fixes the signal nr raised for divizion by zero from
SIGILL to SIGFPE, in accordance to POSIX and other archs.

This came up due to a failed test in the GCC testsuite.

Signed-off-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>
2011-10-14 12:24:31 +02:00
Edgar E. Iglesias
69515f8b95 microblaze: Switch ELF_ARCH code to 189
Switch arch code to 189, the registered code in the upstream
version of binutils. Continue to accept the experimental 0xbaab.

Signed-off-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>
Signed-off-by: Michal Simek <monstr@monstr.eu>
2011-10-14 12:24:31 +02:00
Eli Billauer
0fb2a6f283 microblaze: Added DMA sync operations
Added support gor dma_direct_sync_single_for_*() and dma_direct_sync_sg_for_*()

Signed-off-by: Eli Billauer <eli.billauer@gmail.com>
Signed-off-by: Michal Simek <monstr@monstr.eu>
2011-10-14 12:24:30 +02:00
Eli Billauer
cf560c1801 microblaze: Moved __dma_sync() to dma-mapping.h
__dma_sync_page() was replaced by __dma_sync(), and parameters of calls to
the new function were adjusted to match __dma_sync()'s format.

Signed-off-by: Eli Billauer <eli.billauer@gmail.com>
Signed-off-by: Michal Simek <monstr@monstr.eu>
2011-10-14 12:24:29 +02:00
Michal Simek
2309f7cfca microblaze: Add PVR for Microblaze v8.20.a
Microblaze v8.20.a has 0x15 version string.

Signed-off-by: Michal Simek <monstr@monstr.eu>
2011-10-14 12:24:28 +02:00
Michal Simek
9c6f6f549f microblaze: Clear top bit from cnt32_to_63
Top bit is used as garbage and it must be clear
explicitly.
It is causing the problem with soft lookup code
because it checks delays which are long when
top bit is setup.

Signed-off-by: Michal Simek <monstr@monstr.eu>
2011-10-14 12:24:20 +02:00
NeilBrown
f5b9409973 All Arch: remove linkage for sys_nfsservctl system call
The nfsservctl system call is now gone, so we should remove all
linkage for it.

Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-08-26 15:09:58 -07:00
Linus Torvalds
9ed3689bdc Merge branch 'next' of git://git.monstr.eu/linux-2.6-microblaze
* 'next' of git://git.monstr.eu/linux-2.6-microblaze:
  microblaze: Do not show error message for 32 interrupt lines
  Revert "microblaze: PCI fix typo fault in of_node pointer moving into pci_bus"
  microblaze: PCI fix typo fault in of_node pointer moving into pci_bus
  microblaze: Add support for early console on mdm
  microblaze: Simplify early console binding from DT
  microblaze: Get early printk console earlier
  microblaze: Standardise cpuinfo output for cache policy
  microblaze: Unprivileged stream instruction awareness
  microblaze: trivial: Fix typo fault
  microblaze: exec: Remove redundant set_fs(USER_DS)
  microblaze: Remove duplicated prototype of start_thread()
  microblaze: Fix unaligned value saving to the stack for system with MMU
  microblaze/irqs: Do not trace arch_local_{*,irq_*} functions
2011-07-27 09:24:20 -07:00
Michal Simek
363922946f microblaze: Do not show error message for 32 interrupt lines
When interrupt controller uses 32 interrupts lines the kernel
show error message about mismatch in kind-of-intr parameter
because it exceeds u32. Recast fixs this issue.

Signed-off-by: Michal Simek <monstr@monstr.eu>
2011-07-27 11:02:00 +02:00
Michal Simek
ca12adc8ca microblaze: Add support for early console on mdm
Support mdm early console:
 - extend time for retries
 - add mdm compatible property

Signed-off-by: Michal Simek <monstr@monstr.eu>
2011-07-25 09:25:26 +02:00
Michal Simek
2aa8e37596 microblaze: Simplify early console binding from DT
Recognize early Linux console from chosen - linux,stdout-path
instead of detecting the first console with appropriate
compatible strings.
This patch solved the problem on system with multiple
consoles.

Signed-off-by: Michal Simek <monstr@monstr.eu>
2011-07-25 09:25:13 +02:00
Michal Simek
e721a45fbe microblaze: Get early printk console earlier
1. Register early console as standard console
2. Enable CON_BOOT console flag to ensure auto-unregistering by the kernel
3. remap_early_printk function remap physical console baseaddr to virtual space

Usage specific function for console remap is done after memory initialization
with IRQ turn off that's why there is not necessary to protect it.

The reason for remapping is that the kernel use TLB 63 for 1:1 address mapping
to be able to use console in very early boot-up phase. But allocating one TLB
just for console caused performance degression that's why ioremaps create new
mapping and TLB 63 is automatically released and ready to use.

Signed-off-by: Michal Simek <monstr@monstr.eu>
CC: Russell King <linux@arm.linux.org.uk>
CC: Ralf Baechle <ralf@linux-mips.org>
CC: Ingo Molnar <mingo@redhat.com>
CC: Alan Cox <alan@linux.intel.com>
CC: <linux-serial@vger.kernel.org>
CC: Arnd Bergmann <arnd@arndb.de>
2011-07-25 09:23:47 +02:00
John A. Williams
95ce618f85 microblaze: Standardise cpuinfo output for cache policy
The current cpuinfo output for the cache policy has no leading tag:, making
it difficult to parse.  Add a leaning "Dcache-policy:" tag to this field.

Signed-off-by: John A. Williams <john.williams@petalogix.com>
2011-07-25 09:13:43 +02:00
John A. Williams
8904976e8c microblaze: Unprivileged stream instruction awareness
Add cpuinfo support for the new MicroBlaze option permitting userspace
(unprivileged) access to the streaming instructions (FSL / AXI-stream).

Emit a noisy warning at bootup if this is enabled, because bad user code
can potentially lockup the CPU.

Signed-off-by: John A. Williams <john.williams@petalogix.com>
Signed-off-by: Michal Simek <monstr@monstr.eu>
2011-07-25 09:13:42 +02:00
Mathias Krause
a0ec99bda8 microblaze: exec: Remove redundant set_fs(USER_DS)
The address limit is already set in flush_old_exec() so this
set_fs(USER_DS) is redundant.

Signed-off-by: Mathias Krause <minipli@googlemail.com>
2011-07-25 09:07:45 +02:00
Michal Simek
c11389406f microblaze: Fix unaligned value saving to the stack for system with MMU
Several registers weren't saved correctly to the stack.

Unaligned expection for system with MMU stores
value in ex_tmp_data_loc_X address which is load to registers r3.
The next step is to move this value from r3 to a destination
register which caused unaligned exception. For several registers
this value was directly moved to the register.

For example for r28:
by "or r28, r0, r3"

but register r28 was rewritten when kernel returns from exception
handler by value saved on stack.

This patch changed r3 saving to the correct address on the stack.
For example for r28:
by "swi r3, r1, 4 * 28"

When kernel returns from the exception handler, correct value is restored.

Signed-off-by: Michal Simek <monstr@monstr.eu>
2011-07-25 09:07:45 +02:00
Jonas Bonn
66574cc054 modules: make arch's use default loader hooks
This patch removes all the module loader hook implementations in the
architecture specific code where the functionality is the same as that
now provided by the recently added default hooks.

Signed-off-by: Jonas Bonn <jonas@southpole.se>
Acked-by: Mike Frysinger <vapier@gentoo.org>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Tested-by: Michal Simek <monstr@monstr.eu>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2011-07-24 22:06:04 +09:30
Linus Torvalds
571503e100 Merge branch 'setns'
* setns:
  ns: Wire up the setns system call

Done as a merge to make it easier to fix up conflicts in arm due to
addition of sendmmsg system call
2011-05-28 10:51:01 -07:00
Eric W. Biederman
7b21fddd08 ns: Wire up the setns system call
32bit and 64bit on x86 are tested and working.  The rest I have looked
at closely and I can't find any problems.

setns is an easy system call to wire up.  It just takes two ints so I
don't expect any weird architecture porting problems.

While doing this I have noticed that we have some architectures that are
very slow to get new system calls.  cris seems to be the slowest where
the last system calls wired up were preadv and pwritev.  avr32 is weird
in that recvmmsg was wired up but never declared in unistd.h.  frv is
behind with perf_event_open being the last syscall wired up.  On h8300
the last system call wired up was epoll_wait.  On m32r the last system
call wired up was fallocate.  mn10300 has recvmmsg as the last system
call wired up.  The rest seem to at least have syncfs wired up which was
new in the 2.6.39.

v2: Most of the architecture support added by Daniel Lezcano <dlezcano@fr.ibm.com>
v3: ported to v2.6.36-rc4 by: Eric W. Biederman <ebiederm@xmission.com>
v4: Moved wiring up of the system call to another patch
v5: ported to v2.6.39-rc6
v6: rebased onto parisc-next and net-next to avoid syscall  conflicts.
v7: ported to Linus's latest post 2.6.39 tree.

>  arch/blackfin/include/asm/unistd.h     |    3 ++-
>  arch/blackfin/mach-common/entry.S      |    1 +
Acked-by: Mike Frysinger <vapier@gentoo.org>

Oh - ia64 wiring looks good.
Acked-by: Tony Luck <tony.luck@intel.com>

Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-05-28 10:48:39 -07:00
Russell King
03eb14199e Merge branch 'devicetree/arm-next' of git://git.secretlab.ca/git/linux-2.6 into devel-stable 2011-05-25 00:08:17 +01:00
Thomas Gleixner
a18f22a968 Merge branch 'consolidate-clksrc-i8253' of master.kernel.org:~rmk/linux-2.6-arm into timers/clocksource
Conflicts:
	arch/ia64/kernel/cyclone.c
	arch/mips/kernel/i8253.c
	arch/x86/kernel/i8253.c

Reason: Resolve conflicts so further cleanups do not conflict further

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-05-14 12:06:36 +02:00
Grant Likely
85f60ae4ee dt/flattree: explicitly pass command line pointer to early_init_dt_scan_chosen
This patch drops the reference to a global 'cmd_line' variable from
early_init_dt_scan_chosen, and instead passes the pointer to the command
line string via the *data argument.  Each architecture does something
slightly different with the initial command line, so it makes sense for
the architecture to be able to specify the variable name.

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-05-11 14:53:18 +02:00
Linus Torvalds
42933bac11 Merge branch 'for-linus2' of git://git.profusion.mobi/users/lucas/linux-2.6
* 'for-linus2' of git://git.profusion.mobi/users/lucas/linux-2.6:
  Fix common misspellings
2011-04-07 11:14:49 -07:00
Michal Simek
9e1491de51 microblaze: Fix ftrace
- Do not trace idle loop which takes a lot time
- Fix cache handling in generic ftrace code
- Do not trace lib functions ashldi3, ashrdi3, lshrdi3
  Functions are called from generic ftrace code which
  can't be traced

Signed-off-by: Michal Simek <monstr@monstr.eu>
2011-04-01 09:34:51 +02:00