From: Theodore Tso <tytso@mit.edu>
To: "H. Peter Anvin" <hpa@zytor.com>
Cc: linux-kernel@vger.kernel.org, linuxppc-dev@ozlabs.org,
paulus@samba.org, dwmw2@infradead.org,
David Miller <davem@davemloft.net>,
alan@lxorguk.ukuu.org.uk
Subject: Re: [PATCH] Stop pmac_zilog from abusing 8250's device numbers.
Date: Wed, 4 Apr 2007 13:41:53 -0400 [thread overview]
Message-ID: <20070404174153.GI31973@thunk.org> (raw)
In-Reply-To: <4613CF6A.2090407@zytor.com>
On Wed, Apr 04, 2007 at 09:16:42AM -0700, H. Peter Anvin wrote:
> One option would be to move the 8250-based serial ports, to, say,
> /dev/ttyN* (for National Semiconductors -- the best I could come up
> with) and redefine /dev/ttyS* as a serial port multiplexer which maps in
> all the types, for the ones that really want dynamic mapping.
> Of course, now you have the potential of aliasing, again, which tends to
> cause all kinds of headaches w.r.t. locking.
That would break the 99.9% of the the world using Intel-based systems
which only have 8250's, for very little gain.
Like it or not, /dev/ttySx and 8250 UART's are to serial ports what
the PCI is to system buses....
- Ted
WARNING: multiple messages have this Message-ID (diff)
From: Theodore Tso <tytso@mit.edu>
To: "H. Peter Anvin" <hpa@zytor.com>
Cc: David Miller <davem@davemloft.net>,
dwmw2@infradead.org, paulus@samba.org, alan@lxorguk.ukuu.org.uk,
flar@allandria.com, linuxppc-dev@ozlabs.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] Stop pmac_zilog from abusing 8250's device numbers.
Date: Wed, 4 Apr 2007 13:41:53 -0400 [thread overview]
Message-ID: <20070404174153.GI31973@thunk.org> (raw)
In-Reply-To: <4613CF6A.2090407@zytor.com>
On Wed, Apr 04, 2007 at 09:16:42AM -0700, H. Peter Anvin wrote:
> One option would be to move the 8250-based serial ports, to, say,
> /dev/ttyN* (for National Semiconductors -- the best I could come up
> with) and redefine /dev/ttyS* as a serial port multiplexer which maps in
> all the types, for the ones that really want dynamic mapping.
> Of course, now you have the potential of aliasing, again, which tends to
> cause all kinds of headaches w.r.t. locking.
That would break the 99.9% of the the world using Intel-based systems
which only have 8250's, for very little gain.
Like it or not, /dev/ttySx and 8250 UART's are to serial ports what
the PCI is to system buses....
- Ted
next prev parent reply other threads:[~2007-04-04 17:42 UTC|newest]
Thread overview: 189+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-04-03 14:25 [PATCH] Stop pmac_zilog from abusing 8250's device numbers David Woodhouse
2007-04-03 20:37 ` Brad Boyer
2007-04-03 22:58 ` David Woodhouse
2007-04-03 23:14 ` Paul Mackerras
2007-04-03 23:14 ` Paul Mackerras
2007-04-03 23:28 ` David Woodhouse
2007-04-03 23:28 ` David Woodhouse
2007-04-03 21:29 ` Brad Boyer
2007-04-03 21:29 ` Brad Boyer
2007-04-03 23:57 ` David Woodhouse
2007-04-03 23:57 ` David Woodhouse
[not found] ` <200704032210 02.GA13210@cynthia.pants.nu>
2007-04-03 22:10 ` Brad Boyer
2007-04-03 22:10 ` Brad Boyer
2007-04-04 0:54 ` David Woodhouse
2007-04-04 0:54 ` David Woodhouse
2007-04-03 23:09 ` Brad Boyer
2007-04-03 23:09 ` Brad Boyer
2007-04-04 1:38 ` Alan Cox
2007-04-04 1:38 ` Alan Cox
2007-04-04 2:05 ` Chris Adams
2007-04-04 2:10 ` Valdis.Kletnieks
2007-04-04 2:10 ` Valdis.Kletnieks
2007-04-04 1:57 ` David Lang
2007-04-04 1:57 ` David Lang
2007-04-04 8:51 ` Russell King
2007-04-04 8:51 ` Russell King
2007-04-04 9:48 ` Geert Uytterhoeven
2007-04-04 9:48 ` Geert Uytterhoeven
2007-04-04 16:09 ` H. Peter Anvin
2007-04-04 16:09 ` H. Peter Anvin
2007-04-04 16:22 ` Linas Vepstas
2007-04-04 16:22 ` Linas Vepstas
2007-04-04 16:34 ` David Woodhouse
2007-04-04 16:34 ` David Woodhouse
2007-04-04 17:38 ` Linas Vepstas
2007-04-04 17:38 ` Linas Vepstas
2007-04-04 1:16 ` David Miller
2007-04-04 1:16 ` David Miller
2007-04-04 1:28 ` Alan Cox
2007-04-04 1:28 ` Alan Cox
2007-04-04 1:07 ` David Lang
2007-04-04 1:07 ` David Lang
2007-04-04 1:44 ` Alan Cox
2007-04-04 1:44 ` Alan Cox
2007-04-04 1:23 ` David Lang
2007-04-04 1:23 ` David Lang
2007-04-04 1:32 ` David Lang
2007-04-04 1:32 ` David Lang
2007-04-04 16:07 ` H. Peter Anvin
2007-04-04 16:07 ` H. Peter Anvin
2007-04-04 17:50 ` Linas Vepstas
2007-04-04 17:50 ` Linas Vepstas
2007-04-04 1:50 ` David Miller
2007-04-04 1:50 ` David Miller
2007-04-04 11:14 ` Alan Cox
2007-04-04 11:14 ` Alan Cox
2007-04-04 12:20 ` Olivier Galibert
2007-04-04 12:20 ` Olivier Galibert
2007-04-04 1:48 ` David Miller
2007-04-04 1:48 ` David Miller
2007-04-04 3:07 ` Gerhard Mack
2007-04-04 3:07 ` Gerhard Mack
2007-04-11 16:30 ` Benny Amorsen
2007-04-11 16:30 ` Benny Amorsen
2007-04-12 15:34 ` Roland Dreier
2007-04-13 2:45 ` Gerhard Mack
2007-04-13 2:45 ` Gerhard Mack
2007-04-13 2:24 ` David Lang
2007-04-13 2:24 ` David Lang
2007-04-13 8:09 ` Geert Uytterhoeven
2007-04-13 8:09 ` Geert Uytterhoeven
2007-04-04 0:02 ` David Miller
2007-04-04 0:02 ` David Miller
2007-04-04 0:12 ` David Woodhouse
2007-04-04 0:12 ` David Woodhouse
2007-04-03 22:14 ` Brad Boyer
2007-04-03 22:14 ` Brad Boyer
2007-04-04 1:13 ` Benjamin Herrenschmidt
2007-04-04 1:13 ` Benjamin Herrenschmidt
2007-04-04 1:17 ` David Miller
2007-04-04 1:17 ` David Miller
2007-04-04 1:32 ` Benjamin Herrenschmidt
2007-04-04 1:32 ` Benjamin Herrenschmidt
2007-04-04 0:01 ` [PATCH v2] " David Woodhouse
2007-04-04 0:01 ` David Woodhouse
2007-04-04 1:25 ` [PATCH] " Alan Cox
2007-04-04 1:25 ` Alan Cox
2007-04-04 4:20 ` Paul Mackerras
2007-04-04 4:20 ` Paul Mackerras
2007-04-04 5:19 ` David Woodhouse
2007-04-04 5:19 ` David Woodhouse
2007-04-04 5:50 ` David Miller
2007-04-04 5:50 ` David Miller
2007-04-04 7:04 ` Geert Uytterhoeven
2007-04-04 7:04 ` Geert Uytterhoeven
2007-04-04 13:43 ` Maciej W. Rozycki
2007-04-04 13:43 ` Maciej W. Rozycki
2007-04-04 7:52 ` Russell King
2007-04-04 7:52 ` Russell King
2007-04-04 8:41 ` David Miller
2007-04-04 8:41 ` David Miller
2007-04-04 5:53 ` Paul Mackerras
2007-04-04 5:53 ` Paul Mackerras
2007-04-04 6:03 ` David Woodhouse
2007-04-04 6:03 ` David Woodhouse
2007-04-04 6:31 ` Paul Mackerras
2007-04-04 6:31 ` Paul Mackerras
2007-04-04 14:19 ` [PATCH v3] Stop pmac_zilog from abusing 8250's device numbers; optionally David Woodhouse
2007-04-04 14:19 ` David Woodhouse
2007-04-04 23:48 ` Paul Mackerras
2007-04-04 23:48 ` Paul Mackerras
2007-04-05 12:45 ` David Woodhouse
2007-04-05 12:45 ` David Woodhouse
2007-04-05 22:53 ` Paul Mackerras
2007-04-05 22:53 ` Paul Mackerras
2007-04-05 22:59 ` David Woodhouse
2007-04-05 22:59 ` David Woodhouse
2007-04-05 14:31 ` Atsushi Nemoto
2007-04-05 14:31 ` Atsushi Nemoto
2007-04-05 14:47 ` David Woodhouse
2007-04-05 14:47 ` David Woodhouse
2007-04-05 15:09 ` Atsushi Nemoto
2007-04-05 15:09 ` Atsushi Nemoto
2007-04-05 15:18 ` David Woodhouse
2007-04-05 15:18 ` David Woodhouse
2007-04-05 15:49 ` Atsushi Nemoto
2007-04-05 15:49 ` Atsushi Nemoto
2007-04-05 15:56 ` Geert Uytterhoeven
2007-04-05 15:56 ` Geert Uytterhoeven
2007-04-04 8:12 ` [PATCH] Stop pmac_zilog from abusing 8250's device numbers David Miller
2007-04-04 8:12 ` David Miller
2007-04-04 8:38 ` Russell King
2007-04-04 8:38 ` Russell King
2007-04-04 8:43 ` David Miller
2007-04-04 8:43 ` David Miller
2007-04-04 9:00 ` Russell King
2007-04-04 9:00 ` Russell King
2007-04-04 19:58 ` David Miller
2007-04-04 19:58 ` David Miller
2007-04-04 12:21 ` Theodore Tso
2007-04-04 16:10 ` Russell King
2007-04-04 16:16 ` H. Peter Anvin
2007-04-04 16:25 ` Alan Cox
2007-04-04 16:25 ` Alan Cox
2007-04-04 17:41 ` Theodore Tso [this message]
2007-04-04 17:41 ` Theodore Tso
2007-04-04 18:15 ` Russell King
2007-04-04 19:50 ` David Woodhouse
2007-04-04 19:50 ` David Woodhouse
2007-04-05 6:05 ` Paul Mackerras
2007-04-05 6:05 ` Paul Mackerras
2007-04-05 8:50 ` Russell King
2007-04-05 8:50 ` Russell King
2007-04-05 16:15 ` Olivier Galibert
2007-04-05 21:41 ` Pavel Machek
2007-04-05 21:41 ` Pavel Machek
2007-04-03 23:56 ` David Miller
2007-04-03 23:56 ` David Miller
2007-04-04 1:13 ` Benjamin Herrenschmidt
2007-04-04 1:13 ` Benjamin Herrenschmidt
2007-04-04 6:58 ` Paul Mackerras
2007-04-04 6:58 ` Paul Mackerras
2007-04-04 14:16 ` David Woodhouse
2007-04-04 14:16 ` David Woodhouse
2007-04-03 23:55 ` David Miller
2007-04-03 23:55 ` David Miller
2007-04-04 1:19 ` Alan Cox
2007-04-04 1:19 ` Alan Cox
2007-04-04 1:21 ` David Miller
2007-04-04 1:21 ` David Miller
2007-04-04 1:36 ` Alan Cox
2007-04-04 1:36 ` Alan Cox
2007-04-04 1:47 ` David Miller
2007-04-04 1:47 ` David Miller
2007-04-04 7:47 ` Russell King
2007-04-04 7:47 ` Russell King
2007-04-04 9:55 ` Paul Mackerras
2007-04-04 9:55 ` Paul Mackerras
2007-04-04 16:06 ` Russell King
2007-04-04 16:06 ` Russell King
2007-04-04 6:58 ` Geert Uytterhoeven
2007-04-04 6:58 ` Geert Uytterhoeven
2007-08-14 11:49 ` Olaf Hering
2007-08-14 11:49 ` Olaf Hering
2007-08-14 11:53 ` David Woodhouse
2007-08-14 11:53 ` David Woodhouse
2007-08-14 16:24 ` Olaf Hering
2007-08-14 16:24 ` Olaf Hering
2007-04-04 7:55 ` Olaf Hering
[not found] <fa.RNOVtHsCnerNJiCxv9p57P7pZcA@ifi.uio.no>
[not found] ` <fa.dSkcKtgkzrihvFnFz6eHJ4FfEqo@ifi.uio.no>
[not found] ` <fa.QUe06itDHMey7lWZGdbZCBEo+KI@ifi.uio.no>
[not found] ` <fa.Hc/xBcsQlAMlaXgROFi/tmfDmUc@ifi.uio.no>
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20070404174153.GI31973@thunk.org \
--to=tytso@mit.edu \
--cc=alan@lxorguk.ukuu.org.uk \
--cc=davem@davemloft.net \
--cc=dwmw2@infradead.org \
--cc=hpa@zytor.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linuxppc-dev@ozlabs.org \
--cc=paulus@samba.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.