linux-toradex.git/include/linux/spinlock.h, branch v2.6.32.5

locking: Simplify spinlock inlining

2009-08-31T16:08:51+00:00

For !DEBUG_SPINLOCK && !PREEMPT && SMP the spin_unlock()
functions were always inlined by using special defines which
would call the __raw* functions.

The out-of-line variants for these functions would be generated
anyway.

Use the new per unlock/locking variant mechanism to force
inlining of the unlock functions like before. This is not a
functional change, we just get rid of one additional way to
force inlining.

Signed-off-by: Heiko Carstens 
Acked-by: Peter Zijlstra 
Cc: Arnd Bergmann 
Cc: Nick Piggin 
Cc: Martin Schwidefsky 
Cc: Horst Hartmann 
Cc: Christian Ehrhardt 
Cc: Andrew Morton 
Cc: Linus Torvalds 
Cc: David Miller 
Cc: Benjamin Herrenschmidt 
Cc: Paul Mackerras 
Cc: Geert Uytterhoeven 
Cc: Roman Zippel 
Cc: 
LKML-Reference: <20090831124418.848735034@de.ibm.com>
Signed-off-by: Ingo Molnar

locking: Move spinlock function bodies to header file

2009-08-31T16:08:50+00:00

Move spinlock function bodies to header file by creating a
static inline version of each variant. Use the inline version
on the out-of-line code.

This shouldn't make any difference besides that the spinlock
code can now be used to generate inlined spinlock code.

Signed-off-by: Heiko Carstens 
Acked-by: Arnd Bergmann 
Acked-by: Peter Zijlstra 
Cc: Nick Piggin 
Cc: Martin Schwidefsky 
Cc: Horst Hartmann 
Cc: Christian Ehrhardt 
Cc: Andrew Morton 
Cc: Linus Torvalds 
Cc: David Miller 
Cc: Benjamin Herrenschmidt 
Cc: Paul Mackerras 
Cc: Geert Uytterhoeven 
Cc: Roman Zippel 
Cc: 
LKML-Reference: <20090831124417.859022429@de.ibm.com>
Signed-off-by: Ingo Molnar

memory barrier: adding smp_mb__after_lock

2009-07-10T00:06:58+00:00

Adding smp_mb__after_lock define to be used as a smp_mb call after
a lock.

Making it nop for x86, since {read|write|spin}_lock() on x86 are
full memory barriers.

Signed-off-by: Jiri Olsa 
Signed-off-by: Eric Dumazet 
Signed-off-by: David S. Miller

Allow rwlocks to re-enable interrupts

2009-04-03T02:05:11+00:00

Pass the original flags to rwlock arch-code, so that it can re-enable
interrupts if implemented for that architecture.

Initially, make __raw_read_lock_flags and __raw_write_lock_flags stubs
which just do the same thing as non-flags variants.

Signed-off-by: Petr Tesarik 
Signed-off-by: Robin Holt 
Acked-by: Peter Zijlstra 
Cc: 
Acked-by: Ingo Molnar 
Cc: "Luck, Tony" 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

x86: spinlocks: define dummy __raw_spin_is_contended

2009-02-09T16:15:39+00:00

Architectures other than mips and x86 are not using ticket spinlocks.
Therefore, the contention on the lock is meaningless, since there is
nobody known to be waiting on it (arguably /fairly/ unfair locks).

Dummy it out to return 0 on other architectures.

Signed-off-by: Kyle McMartin 
Acked-by: Ralf Baechle 
Acked-by: Ingo Molnar 
Signed-off-by: Linus Torvalds

lockdep: spin_lock_nest_lock()

2008-08-11T07:30:24+00:00

Expose the new lock protection lock.

This can be used to annotate places where we take multiple locks of the
same class and avoid deadlocks by always taking another (top-level) lock
first.

NOTE: we're still bound to the MAX_LOCK_DEPTH (48) limit.

Signed-off-by: Peter Zijlstra 
Signed-off-by: Ingo Molnar

locking: add typecheck on irqsave and friends for correct flags

2008-07-25T17:53:26+00:00

There haave been several areas in the kernel where an int has been used for
flags in local_irq_save() and friends instead of a long.  This can cause some
hard to debug problems on some architectures.

This patch adds a typecheck inside the irqsave and restore functions to flag
these cases.

[akpm@linux-foundation.org: coding-style fixes]
[akpm@linux-foundation.org: build fix]
Signed-off-by: Steven Rostedt 
Cc: Ingo Molnar 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

locking: remove unused double_spin_lock()

2008-04-17T10:22:31+00:00

double_spin_lock() has no callers, and it can't be used without additional
lockdep annotations, remove it.

Signed-off-by: Oleg Nesterov 
Cc: Arjan van de Ven 
Cc: Heiko Carstens 
Cc: Ingo Molnar 
Cc: Peter Zijlstra 
Signed-off-by: Andrew Morton 
Signed-off-by: Thomas Gleixner

Spell out behavior of atomic_dec_and_lock() in kerneldoc

2008-04-11T19:17:46+00:00

A little more detail here wouldn't hurt.

Signed-off-by: J. Bruce Fields 
Signed-off-by: Jonathan Corbet

Remove fastcall from linux/include

2008-02-08T17:22:31+00:00

[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Harvey Harrison 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds