user/sven/linux.git/Documentation/atomic_ops.txt, branch tmp/leds/core

documentation: atomic_add_unless() doesn't imply mb() on failure

2008-02-24T01:52:36Z

(sorry for being offtpoic, but while experts are here...) A "typical" implementation of atomic_add_unless() can return 0 immediately after the first atomic_read() (before doing cmpxchg). In that case it doesn't provide any barrier semantics. See include/asm-ia64/atomic.h as an example. We should either change the implementation, or fix the docs. Signed-off-by: Oleg Nesterov Acked-by: Nick Piggin Signed-off-by: Linus Torvalds

bitops: introduce lock ops

2007-10-18T21:37:29Z

Introduce test_and_set_bit_lock / clear_bit_unlock bitops with lock semantics. Convert all architectures to use the generic implementation. Signed-off-by: Nick Piggin Acked-By: David Howells Cc: Richard Henderson Cc: Ivan Kokshaysky Cc: Russell King Cc: Haavard Skinnemoen Cc: Bryan Wu Cc: Mikael Starvik Cc: David Howells Cc: Yoshinori Sato Cc: "Luck, Tony" Cc: Hirokazu Takata Cc: Geert Uytterhoeven Cc: Roman Zippel Cc: Greg Ungerer Cc: Ralf Baechle Cc: Kyle McMartin Cc: Matthew Wilcox Cc: Paul Mackerras Cc: Benjamin Herrenschmidt Cc: Heiko Carstens Cc: Martin Schwidefsky Cc: Paul Mundt Cc: Kazumoto Kojima Cc: Richard Curnow Cc: William Lee Irwin III Cc: "David S. Miller" Cc: Jeff Dike Cc: Paolo 'Blaisorblade' Giarrusso Cc: Miles Bader Cc: Andi Kleen Cc: Chris Zankel Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

atomic_ops.txt has incorrect, misleading and insufficient information [Bug 9020]

2007-10-17T15:42:58Z

atomic_ops.txt has incorrect, misleading and insufficient information about semantics of initializer, atomic_set, atomic_read and atomic_xchg. It also incorrectly implies that operations mentioned above are not actual atomic operations. Included is most of the patch Document non-semantics of atomic_read() and atomic_set() by Chris Snook, except the word "assignment". Signed-off-by: Matti Linnanvuori Cc: Nick Piggin Cc: "Paul E. McKenney" Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

atomic_ops.txt: mention local_t

2007-10-17T15:42:56Z

local_t is a variant of atomic_t and has related ops to match. Add reference for local_t documentation to atomic_ops.txt. Signed-off-by: Grant Grundler Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

Documentation/atomic_ops.txt typo fix

2007-06-09T00:23:33Z

Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

Spelling fixes for Documentation/atomic_ops.txt

2006-06-26T16:27:35Z

Spelling and typo fixes for Documentation/atomic_ops.txt Signed-off-by: Adrian Bunk

[PATCH] atomic: inc_not_zero

2005-11-14T02:14:16Z

Introduce an atomic_inc_not_zero operation. Make this a special case of atomic_add_unless because lockless pagecache actually wants atomic_inc_not_negativeone due to its offset refcount. Signed-off-by: Nick Piggin Cc: "Paul E. McKenney" Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] atomic: cmpxchg

2005-11-14T02:14:16Z

Introduce an atomic_cmpxchg operation. Signed-off-by: Nick Piggin Cc: "Paul E. McKenney" Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[DOC]: Fix typo in atomic_ops.txt

2005-02-10T11:17:56Z

s/smb_/smp_/ Noticed by Werner Almesberger. Signed-off-by: David S. Miller

[DOC]: Some atomic_ops.txt updates.

2005-02-06T13:20:23Z

Based upon feedback from Linus: - Touch on xchg(), cmpxchg() and spinlocks lightly. - Discuss atomic_dec_and_test() - Add some historical platform notes. Signed-off-by: David S. Miller