Re: [PATCH 6/9] isdn4linux: Siemens Gigaset drivers - procfs interface

[Andrew Morton <akpm@osdl.org>]

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.

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