tree 5ea4e042a5883a7508b7ad044d5c82208c862dc7
parent 32f13521ca68bc624ff6effc77f308a52b038bf0
author Peter Hurley <peter@hurleysoftware.com> 1371302058 -0400
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1374622980 -0700

n_tty: Split n_tty_chars_in_buffer() for reader-only interface

N_TTY .chars_in_buffer() method requires serialized access if
the current thread is not the single-consumer, n_tty_read().

Separate the internal interface; prepare for lockless read-side.

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