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staging: comedi: comedi_buf: cleanup comedi_buf_read_n_available()
authorH Hartley Sweeten <hsweeten@visionengravers.com>
Wed, 9 Jan 2013 20:30:22 +0000 (13:30 -0700)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Fri, 18 Jan 2013 00:53:59 +0000 (16:53 -0800)
For aesthetic reasons, cleanup this function a bit.

Change the (async == NULL) test to simply (!async).

Reword the comment about the need for the smp_rmb()..

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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