linux-kernel - Re: [PATCH 3/9] vt: delete unneeded functions register_con_driver|take_over

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Date:	Wed, 8 May 2013 13:14:12 -0700
From:	Greg KH <gregkh@...uxfoundation.org>
To:	Peter Hurley <peter@...leysoftware.com>
Cc:	Wang YanQing <udknight@...il.com>, airlied@...hat.com,
	linux-kernel@...r.kernel.org, jslaby@...e.cz, alan@...ux.intel.com
Subject: Re: [PATCH 3/9] vt: delete unneeded functions
 register_con_driver|take_over_console

On Wed, May 08, 2013 at 03:56:49PM -0400, Peter Hurley wrote:
> On 05/08/2013 02:13 PM, Wang YanQing wrote:
> >Now there is no place use register_con_driver|take_over_console,
> >and we can achieve their function with do_register_con_driver|
> >do_take_over_console easily, so just delete them to reduce code duplication.
> >
> >Signed-off-by: Wang YanQing <udknight@...il.com>
> >---
> >  drivers/tty/vt/vt.c     | 45 ---------------------------------------------
> >  include/linux/console.h |  2 --
> >  2 files changed, 47 deletions(-)
> >
> >diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c
> >index fbd447b..852d470 100644
> >--- a/drivers/tty/vt/vt.c
> >+++ b/drivers/tty/vt/vt.c
> >@@ -3576,26 +3576,6 @@ err:
> >  	return retval;
> >  }
> >
> >-/**
> >- * register_con_driver - register console driver to console layer
> >- * @csw: console driver
> >- * @first: the first console to take over, minimum value is 0
> >- * @last: the last console to take over, maximum value is MAX_NR_CONSOLES -1
> >- *
> >- * DESCRIPTION: This function registers a console driver which can later
> >- * bind to a range of consoles specified by @first and @last. It will
> >- * also initialize the console driver by calling con_startup().
> >- */
> >-int register_con_driver(const struct consw *csw, int first, int last)
> >-{
> >-	int retval;
> >-
> >-	console_lock();
> >-	retval = do_register_con_driver(csw, first, last);
> >-	console_unlock();
> >-	return retval;
> >-}
> >-EXPORT_SYMBOL(register_con_driver);
> 
> Maybe register_con_driver() should print a deprecated warning
> for a release or two before we remove it.

If there are no in-kernel users, why do we need to keep it around?

thanks,

greg k-h
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