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2016-11-17Documentation: circular-buffers: use READ_ONCE()Mark Rutland1-2/+2
While the {READ,WRITE}_ONCE() macros should be used in preference to ACCESS_ONCE(), the circular buffer documentation uses the latter exclusively. To point people in the right direction, and as a step towards the eventual removal of ACCESS_ONCE(), update the documentation to use READ_ONCE(), as ACCESS_ONCE() is only used in a reader context in the circular buffer documentation. Signed-off-by: Mark Rutland <mark.rutland@arm.com> Acked-by: David Howells <dhowells@redhat.com> Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2013-12-03documentation: Update circular buffer for load-acquire/store-releasePaul E. McKenney1-18/+19
This commit replaces full barriers by targeted use of load-acquire and store-release. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> [ paulmck: Restore comments as suggested by David Howells. ]
2013-12-03documentation: Fix circular-buffer example.Paul E. McKenney1-7/+15
The code sample in Documentation/circular-buffers.txt appears to have a few ordering bugs. This patch therefore applies the needed fixes. Reported-by: Lech Fomicki <lfomicki@poczta.fm> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
2010-03-25Document Linux's circular buffering capabilitiesDavid Howells1-0/+234
Document the circular buffering capabilities available in Linux. Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Reviewed-by: Randy Dunlap <rdunlap@xenotime.net> Reviewed-by: Stefan Richter <stefanr@s5r6.in-berlin.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>