From: Linus Torvalds <torvalds@linux-foundation.org>
Date: Mon, 3 Aug 2009 23:00:15 +0000 (-0700)
Subject: tty-ldisc: make /proc/tty/ldiscs use ldisc_ops instead of ldiscs
X-Git-Tag: v2.6.32-rc1~627^2~75
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f0de0e8d3565ee7feba6228d99763d4cea2087a6;p=pandora-kernel.git

tty-ldisc: make /proc/tty/ldiscs use ldisc_ops instead of ldiscs

The /proc/tty/ldiscs file is totally and utterly un-interested in the
"struct tty_ldisc" structures, and only cares about the underlying ldisc
operations.

So don't make it create a dummy 'struct ldisc' only to get a pointer to
the operations, and then destroy it.  Instead, we split up the function
'tty_ldisc_try_get()', and create a 'get_ldops()' helper that just looks
up the ldisc operations based on the ldisc number.

That makes the code simpler to read (smaller and more well-defined
helper functions), and allows the /proc functions to avoid creating that
useless dummy only to immediately free it again.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Tested-by: Sergey Senozhatsky <sergey.senozhatsky@mail.by>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

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