Commits · 91e45cb16e89d2358536f2f00bb5d69aec1fa5d9 · linux / linux-davinci

11 Aug, 2009 2 commits

[ARM] 5613/1: implement CALLER_ADDRESSx · 91e45cb1

Uwe Kleine-König authored Jul 21, 2009

From: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>

As __builtin_return_address(n) doesn't work for ARM with n > 0, the
kernel needs its own implementation.

This fixes many warnings saying:

	warning: unsupported argument to '__builtin_return_address'

The new methods and walk_stackframe must not be instrumented because
CALLER_ADDRESSx is used in the various tracers and tracing the tracer is
a bad idea.

What's currently missing is an implementation using unwind tables.  This
is not fatal though, it's just that the tracers don't get enough
information to be really useful.

Note that if both ARM_UNWIND and FRAME_POINTER are enabled,
walk_stackframe uses unwind information.  So in this case the same
implementation is used as when FRAME_POINTER is disabled.

Cc: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

91e45cb1

ARM: 5627/1: Fix restoring of lr at the end of mcount · acc780dd

Uwe Kleine-König authored Jul 29, 2009

After ftrace_trace_function is called r1 is probably clobbered so don't
try to use its value for restoring.

This was introduced in v2.6.29~38^2~7
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

acc780dd

29 Jul, 2009 4 commits

ARM: AT91: Use edge irq for AT91-GPIO · a55fb470

Remy Bohmer authored Jul 03, 2009

On ARM there is a problem where the interrupt handler stalls when they
are coming faster than the kernel can handle. The problem seems to
occur on RT primarily, but the problem is also valid for non-RT
kernels.

The problem is twofold:
* the handle_simple_irq() mechanism is used for GPIO, but because the GPIO
interrupt source is actually an edge triggered interrupt source, the
handle_edge_irq() mechanism must be used. While using the simple_irq()
mechanisms edges can be missed for either mainline as RT kernels.
The simple_irq mechanism is *never* meant to be used for these types
of interrupts. See the thread at: http://lkml.org/lkml/2007/11/26/73
* The RT kernels has a problem that the interrupt get masked forever while
the interrupt thread is running and a new interrupt arrives.
In the interrupt threads there is masking done in the handle_simple_irq()
path, while a simple_irq typically cannot be masked.

This patch only solves the first bullet, which is enough for AT91, by
moving the GPIO interrupt handler towards the handle_edge_irq().
To solve the problem in the simple_irq() path a seperate fix has to be done,
but as it is no longer used by AT91, that fix will not affect AT91.

Tested on:
* AT91rm9200-ek, and proprietary board
* AT91SAM9261-ek. (This patches also solves the problem that the DM9000 does
                   not work on this board while using PREEMPT-RT)
Signed-off-by: Remy Bohmer <linux@bohmer.net>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

a55fb470

ARM: OMAP: remove unnecessary locking in clk_get_rate() · 59ad0ff1

Kevin Hilman authored Jul 03, 2009

The locking in the get_rate() hook is unnecessary, and causes problems
when used with the -rt patch, since it may be called recursively.
Signed-off-by: Kevin Hilman <khilman@mvista.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

59ad0ff1

ARM: badge4: Move printk out of irq_disabled region · 30d18e07
Thomas Gleixner authored Jul 03, 2009
```
Reduce latencies on -rt
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
```
30d18e07

ARM: atomic_lock conversions · 8f99f823

Thomas Gleixner authored Jul 03, 2009

Annotate the locks which cannot be converted to sleeping locks in -rt
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

8f99f823

28 Jul, 2009 1 commit
- sched: Fixup missing atomic_ conversions · 89c94487
  Thomas Gleixner authored Jul 28, 2009
```
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
```
  89c94487
27 Jul, 2009 33 commits
- time: Fixup 32bit xtime_lock mismatch · 665b55ef
  Thomas Gleixner authored Jul 27, 2009
```
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
```
  665b55ef
- Subject: rt: mutex x86 64 · 92117778
  Ingo Molnar authored Jul 03, 2009
```
Signed-off-by: Ingo Molnar <mingo@elte.hu>
```
  92117778
- xtime_lock: Convert to atomic_seqlock · 5a950072
  Thomas Gleixner authored Jul 25, 2009
```
Convert xtime_lock to atomic_seqlock and fix up all users.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
```
  5a950072
- seqlock: Create atomic_seqlock · 09e46c7a
  Thomas Gleixner authored Jul 25, 2009
```
atomic_seqlock_t will be used to annotate seqlocks which can not be
converted to sleeping locks in preempt-rt
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
```
  09e46c7a
- x86: Convert tlbstate_lock to atomic_spinlock · a74dbe8f
  Thomas Gleixner authored Jul 25, 2009
```
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
```
  a74dbe8f
- sched: convert rt_runtime_lock to atomic_spin_lock · be71018d
  Thomas Gleixner authored Jul 25, 2009
```
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
```
  be71018d
- sched: Convert thread_group_cputimer lock to atomic_spinlock · a3f22fd7
  Thomas Gleixner authored Jul 25, 2009
```
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
```
  a3f22fd7
- perf_counters: Convert context lock to atomic_spinlock · 3847c2d9
  Thomas Gleixner authored Jul 25, 2009
```
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
```
  3847c2d9
- x86: Convert ioapic locks to atomic_spinlock · f32843e6
  Thomas Gleixner authored Jul 25, 2009
```
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
```
  f32843e6
- x86: convert i8259_lock to atomic_spinlock · 62dff709
  Thomas Gleixner authored Jul 25, 2009
```
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
```
  62dff709
- x86: Convert pci_config_lock to atomic_spinlock · bde31e2e
  Thomas Gleixner authored Jul 25, 2009
```
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
```
  bde31e2e
- i8253: Convert i8253_lock to atomic_spinlock · 48c7e18d
  Thomas Gleixner authored Jul 25, 2009
```
Fixup all users.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
```
  48c7e18d
- x86: convert set_atomicity_lock to atomic_spinlock · 11f7e656
  Thomas Gleixner authored Jul 25, 2009
```
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
```
  11f7e656
- ACPI: Convert c3_lock to atomic_spinlock · 50fee3b3
  Thomas Gleixner authored Jul 25, 2009
```
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
```
  50fee3b3
- rtmutex: Convert wait_lock and pi_lock to atomic_spinlock · d227cf76
  Thomas Gleixner authored Jul 25, 2009
```
Fix up all users.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
```
  d227cf76
- printk: Connvert logbuf_lock to atomic_spinlock · 0835f1f8
  Thomas Gleixner authored Jul 25, 2009
```
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
```
  0835f1f8
- genirq: Convert irqdesc lock to atomic_spinlock · fd2bde5d
  Thomas Gleixner authored Jul 25, 2009
```
Fix up all users.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
```
  fd2bde5d
- trace: Convert various locks to atomic_spinlock · 87654a70
  Thomas Gleixner authored Jul 25, 2009
```
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
```
  87654a70
- clocksource: Convert clocksource_lock to atomic_spinlock · fea886ed
  Thomas Gleixner authored Jul 25, 2009
```
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
```
  fea886ed
- hrtimer: Convert cpu_base->lock to atomic_spinlock · cb1ba1de
  Thomas Gleixner authored Jul 25, 2009
```
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
```
  cb1ba1de
- timer_stats: Convert to atomic_spin_lock · 54852508
  Thomas Gleixner authored Jul 25, 2009
```
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
```
  54852508
- clockevents: Convert clockevents / tick device locks to atomic_spinlock · 3a6e55cb
  Thomas Gleixner authored Jul 25, 2009
```
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
```
  3a6e55cb
- x86: kvm: Convert i8254/i8259 locks to atomic_spinlocks · 4b064e4f
  Thomas Gleixner authored Jul 25, 2009
```
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
```
  4b064e4f
- x86: convert nmi_lock to atomic_spinlock · a76dd8f3
  Thomas Gleixner authored Jul 25, 2009
```
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
```
  a76dd8f3
- sched: Convert cgroups release_list_lock to atomic_spinlock · 58814bae
  Thomas Gleixner authored Jul 25, 2009
```
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
```
  58814bae
- proportions: Convert to atomic_spinlck · 0fc7741c
  Thomas Gleixner authored Jul 25, 2009
```
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
```
  0fc7741c
- sched: convert cpupri_vec lock to atomic_spinlock · 87047afa
  Thomas Gleixner authored Jul 25, 2009
```
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
```
  87047afa
- smp: Convert IPI locks to atomic_spinlock · aadc06f2
  Thomas Gleixner authored Jul 25, 2009
```
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
```
  aadc06f2
- rcu: Convert rcupreempt locks to atomic_spinlock · dcf39949
  Thomas Gleixner authored Jul 25, 2009
```
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
```
  dcf39949
- percpu_counter: Convert to atomic_spinlock · 609368d8
  Thomas Gleixner authored Jul 25, 2009
```
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
```
  609368d8
- oprofile: Covert to atomic_spinlock · 0ef0a8e3
  Thomas Gleixner authored Jul 25, 2009
```
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
```
  0ef0a8e3
- video: Convert vga console lock to atomic_spinlock · 87f163a2
  Thomas Gleixner authored Jul 25, 2009
```
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
```
  87f163a2
- pci: Convert pci_lock to atomic_spinlock · b68d8890
  Thomas Gleixner authored Jul 25, 2009
```
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
```
  b68d8890