linux-kernel - Re: [PATCH] [0/6] kfifo fixes/improvements

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Date:	Wed, 30 Dec 2009 12:32:24 +0100
From:	Stefani Seibold <stefani@...bold.net>
To:	Dmitry Torokhov <dmitry.torokhov@...il.com>
Cc:	Vikram Dhillon <dhillonv10@...il.com>,
	Andi Kleen <andi@...stfloor.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"akpm@...l.org" <akpm@...l.org>
Subject: Re: [PATCH] [0/6] kfifo fixes/improvements

Am Mittwoch, den 30.12.2009, 03:07 -0800 schrieb Dmitry Torokhov:
> On Wed, Dec 30, 2009 at 11:52:15AM +0100, Stefani Seibold wrote:
> > Am Mittwoch, den 30.12.2009, 02:43 -0800 schrieb Dmitry Torokhov:
> > > On Wed, Dec 30, 2009 at 10:29:50AM +0100, Stefani Seibold wrote:
> > > >
> > > I do not need to try the new behavior - you explained it quite well.
> > > You changed the old API to allow processing multiple records at a time
> > > and it does not quite work the way you want with Andi's patch. Now the
> > 
> > Wrong, i did not change the behavior of the old API. It is exactly the
> > same at is was!!!!
> 
> You said:
> 
> "The kfifo_in() and kfifo_out() len parameter is than in the meaning
> of elements not bytes."
> 
> This is the change from the existing API which works with _bytes_:
> 
> /**
>  * kfifo_in - puts some data into the FIFO
>  * @fifo: the fifo to be used.
>  * @from: the data to be added.
>  * @len: the length of the data to be added.
>  *
>  * This function copies at most @len bytes from the @from buffer into
>                                 ^^^^^^^^^^
>  * the FIFO depending on the free space, and returns the number of
>  * bytes copied.
> 
> 

There is no change!!!!!! For a byte type fifo, which is the old orig
type, the number of elements is exactly the number of bytes. 



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