Documentation: circular-buffers: use READ_ONCE()
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: NMark Rutland <mark.rutland@arm.com> Acked-by: NDavid Howells <dhowells@redhat.com> Acked-by: NPaul E. McKenney <paulmck@linux.vnet.ibm.com> Signed-off-by: NJonathan Corbet <corbet@lwn.net>
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