linux-toradex.git/Documentation/memory-barriers.txt, branch v2.6.35.2

Document Linux's circular buffering capabilities

2010-03-24T23:31:22+00:00

Document the circular buffering capabilities available in Linux.

Signed-off-by: David Howells 
Signed-off-by: Paul E. McKenney 
Reviewed-by: Randy Dunlap 
Reviewed-by: Stefan Richter 
Signed-off-by: Linus Torvalds

sched: Document memory barriers implied by sleep/wake-up primitives

2009-04-29T12:15:55+00:00

Add a section to the memory barriers document to note the implied
memory barriers of sleep primitives (set_current_state() and wrappers)
and wake-up primitives (wake_up() and co.).

Also extend the in-code comments on the wake_up() functions to note
these implied barriers.

[ Impact: add documentation ]

Signed-off-by: David Howells 
Cc: Oleg Nesterov 
Cc: Linus Torvalds 
Cc: Andrew Morton 
LKML-Reference: <20090428140138.1192.94723.stgit@warthog.procyon.org.uk>
Signed-off-by: Ingo Molnar

read_barrier_depends arch fixlets

2008-05-14T17:05:18+00:00

read_barrie_depends has always been a noop (not a compiler barrier) on all
architectures except SMP alpha. This brings UP alpha and frv into line with all
other architectures, and fixes incorrect documentation.

Signed-off-by: Nick Piggin 
Acked-by: Paul E. McKenney 
Signed-off-by: Linus Torvalds

PCI: doc/pci: create Documentation/PCI/ and move files into it

2008-04-21T04:46:51+00:00

Create Documentation/PCI/ and move PCI-related files to it.
Fix a few instances of trailing whitespace.
Update references to the new file locations.

Signed-off-by: Randy Dunlap 
Cc: Jesse Barnes 
Signed-off-by: Greg Kroah-Hartman

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

2008-02-24T01:52:36+00:00

(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

2007-10-18T21:37:29+00:00

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

Documentation/memory-barriers.txt: various fixes

2007-05-24T03:14:15+00:00

Fix various grammatical issues in Documentation/memory-barriers.txt.

Cc: "Robert P. J. Day" 
Signed-off-by: Jarek Poplawski 
Signed-off-by: David Howells 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

Fix typos in /Documentation : 'T''

2006-11-30T03:55:36+00:00

This patch fixes typos in various Documentation txts. The patch addresses some
+words starting with the letter 'T'.

Signed-off-by: Matt LaPlante 
Acked-by: Randy Dunlap 
Signed-off-by: Adrian Bunk

[PATCH] A minor fix for set_mb() in Documentation/memory-barriers.txt

2006-11-09T02:29:22+00:00

set_mb() is used by set_current_state() which needs mb(), not wmb().  I
think it would be right to assume that set_mb() implies mb(), all arches
seem to do just this.

Signed-off-by: Oleg Nesterov 
Acked-by: David Howells 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] fix typo in memory barrier docs

2006-10-20T17:26:35+00:00

Fix cut'n'paste typo - &a and &b are used in other examples, in this one
the doc uses &u and &v.

Signed-off-by: Paolo 'Blaisorblade' Giarrusso 
Acked-by: David Howells 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds