From: Peter Hurley <peter@hurleysoftware.com>
Date: Sat, 15 Jun 2013 13:36:09 +0000 (-0400)
Subject: tty: Make driver-side flip buffers lockless
X-Git-Tag: v3.12-rc1~182^2~189
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e8437d7ecbc50198705331449367d401ebb3181f;p=pandora-kernel.git

tty: Make driver-side flip buffers lockless

Driver-side flip buffer input is already single-threaded; 'publish'
the .next link as the last operation on the tail buffer so the
'consumer' sees the already-completed flip buffer.

The commit buffer index is already 'published' by driver-side functions.

Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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