linux-toradex.git/Documentation/memory-barriers.txt, branch v3.12.22

doc: Fix memory-barrier control-dependency example

2013-08-20T04:39:42+00:00

Each control-dependency example needs its barriers between the "if"
condition and the body of the "if" because a control dependency is
a dependency induced by a branch.  This commit makes the needed
adjustment.

Reported-by: Yongming Shen 
Signed-off-by: Paul E. McKenney 
Reviewed-by: Josh Triplett

Documentation: Memory barrier semantics of atomic_xchg()

2013-01-08T22:14:55+00:00

Add atomic_xchg() to documentation for atomic operations and
memory barriers.

Signed-off-by: Richard Braun 
Signed-off-by: Paul E. McKenney 
Reviewed-by: Josh Triplett

Documentation: Fix memory-barriers.txt example

2012-10-23T21:44:46+00:00

This commit fixes a broken example of overlapping stores in the
Documentation/memory-barriers.txt file.

Reported-by: Nikunj A Dadhania 
Signed-off-by: Paul E. McKenney

doc: fix broken references

2011-09-27T16:08:04+00:00

There are numerous broken references to Documentation files (in other
Documentation files, in comments, etc.). These broken references are
caused by typo's in the references, and by renames or removals of the
Documentation files. Some broken references are simply odd.

Fix these broken references, sometimes by dropping the irrelevant text
they were part of.

Signed-off-by: Paul Bolle 
Signed-off-by: Jiri Kosina

smp: Document transitivity for memory barriers.

2011-03-04T16:05:49+00:00

Transitivity is guaranteed only for full memory barriers (smp_mb()).

Signed-off-by: Paul E. McKenney

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