From: Andrew Morton <akpm@osdl.org>
To: Tilman Schmidt <tilman@imap.cc>
Cc: hjlipp@web.de, kkeil@suse.de,
i4ldeveloper@listserv.isdn4linux.de,
linux-usb-devel@lists.sourceforge.net,
linux-kernel@vger.kernel.org, gregkh@suse.de
Subject: Re: [PATCH 6/9] isdn4linux: Siemens Gigaset drivers - procfs interface
Date: Tue, 14 Feb 2006 19:22:32 -0800 [thread overview]
Message-ID: <20060214192232.126e6ab2.akpm@osdl.org> (raw)
In-Reply-To: <43F289F5.2080102@imap.cc>
Tilman Schmidt <tilman@imap.cc> wrote:
>
> > - You did the ringbuffer the wrong way. Don't constrain the head and
> > tail to be within 0..MAX_EVENTS. Instead, just let them wrap right up to
> > 0xffffffff. Apply the masking when you actually _use_ them.
> >
> > That way, empty is (head == tail) and full is (tail - head == MAX_EVENTS).
>
> Interesting idea. I have to admit it's rather new to me. I have always
> done ringbuffers the way they are done in the Gigaset driver now. Can
> you point me to some example code done the way you propose, so I can
> familiarize myself with its advantages?
Pretty much all the Becker-derived net drivers do this - Say,
vortex_private.cur_tx, .cur_tx. Also include/linux/circ_buf.h and its
various users.
next prev parent reply other threads:[~2006-02-15 3:23 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-02-11 14:52 [PATCH 0/9] isdn4linux: add drivers for Siemens Gigaset ISDN DECT PABX Hansjoerg Lipp
2006-02-11 14:52 ` [PATCH 1/9] isdn4linux: Siemens Gigaset drivers - Kconfigs and Makefiles Hansjoerg Lipp
2006-02-11 14:52 ` [PATCH 2/9] isdn4linux: Siemens Gigaset drivers - common module Hansjoerg Lipp
2006-02-11 14:52 ` [PATCH 3/9] isdn4linux: Siemens Gigaset drivers - event layer Hansjoerg Lipp
2006-02-11 14:52 ` [PATCH 4/9] isdn4linux: Siemens Gigaset drivers - isdn4linux interface Hansjoerg Lipp
2006-02-11 14:52 ` [PATCH 5/9] isdn4linux: Siemens Gigaset drivers - tty interface Hansjoerg Lipp
2006-02-11 14:52 ` [PATCH 6/9] isdn4linux: Siemens Gigaset drivers - procfs interface Hansjoerg Lipp
2006-02-11 14:52 ` [PATCH 7/9] isdn4linux: Siemens Gigaset drivers - direct USB connection Hansjoerg Lipp
2006-02-11 14:52 ` [PATCH 8/9] isdn4linux: Siemens Gigaset drivers - isochronous data handler Hansjoerg Lipp
2006-02-11 14:52 ` [PATCH 9/9] isdn4linux: Siemens Gigaset drivers - M105 USB DECT adapter Hansjoerg Lipp
2006-02-15 3:35 ` Greg KH
2006-02-15 3:33 ` [PATCH 7/9] isdn4linux: Siemens Gigaset drivers - direct USB connection Greg KH
2006-02-12 10:27 ` [PATCH 6/9] isdn4linux: Siemens Gigaset drivers - procfs interface Andrew Morton
2006-02-15 1:55 ` Tilman Schmidt
2006-02-15 3:22 ` Andrew Morton [this message]
2006-02-15 3:30 ` Greg KH
2006-02-15 3:27 ` [PATCH 2/9] isdn4linux: Siemens Gigaset drivers - common module Greg KH
2006-02-21 17:01 ` advice on using dev_info(), dev_err() and friends (was: [PATCH 2/9] isdn4linux: Siemens Gigaset drivers - common module) Tilman Schmidt
2006-02-21 23:00 ` Greg KH
2006-02-15 4:13 ` [PATCH 2/9] isdn4linux: Siemens Gigaset drivers - common module Nishanth Aravamudan
2006-02-15 3:19 ` [PATCH 1/9] isdn4linux: Siemens Gigaset drivers - Kconfigs and Makefiles Greg KH
2006-02-16 21:30 ` Tilman Schmidt
2006-02-21 17:16 ` how to handle multi-part patch dependencies (was: [PATCH 1/9] isdn4linux: Siemens Gigaset drivers - Kconfigs and Makefiles) Tilman Schmidt
2006-02-21 23:01 ` Greg KH
2006-02-12 10:29 ` [PATCH 0/9] isdn4linux: add drivers for Siemens Gigaset ISDN DECT PABX Andrew Morton
-- strict thread matches above, loose matches on Subject: below --
2005-12-11 18:20 Hansjoerg Lipp
2005-12-11 18:20 ` [PATCH 1/9] isdn4linux: Siemens Gigaset drivers - Kconfigs and Makefiles Hansjoerg Lipp
2005-12-11 18:20 ` [PATCH 2/9] isdn4linux: Siemens Gigaset drivers - common module Hansjoerg Lipp
2005-12-11 18:20 ` [PATCH 3/9] isdn4linux: Siemens Gigaset drivers - event layer Hansjoerg Lipp
2005-12-11 18:20 ` [PATCH 4/9] isdn4linux: Siemens Gigaset drivers - isdn4linux interface Hansjoerg Lipp
2005-12-11 18:20 ` [PATCH 5/9] isdn4linux: Siemens Gigaset drivers - tty interface Hansjoerg Lipp
2005-12-11 18:20 ` [PATCH 6/9] isdn4linux: Siemens Gigaset drivers - procfs interface Hansjoerg Lipp
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