tree c4733126d13fdf57e10638c18da280c0e7e103ac
parent d7a68be4f265be10e24be931c257af30ca55566b
author Peter Hurley <peter@hurleysoftware.com> 1371303372 -0400
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1374623229 -0700

tty: Avoid false-sharing flip buffer ptrs

Separate the head and tail ptrs to avoid cache-line contention
(so called 'false-sharing') between concurrent threads.

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