linux-kernel - Re: [PATCH 0/4] enhanced reimplemention of the kfifo API

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Date:	Tue, 20 Apr 2010 15:13:18 -0700
From:	Greg KH <gregkh@...e.de>
To:	Stefani Seibold <stefani@...bold.net>
Cc:	linux-kernel@...r.kernel.org, akpm@...ux-foundation.org,
	andi@...stfloor.org, alan@...rguk.ukuu.org.uk, tytso@....edu,
	iws@...o.caltech.edu
Subject: Re: [PATCH 0/4] enhanced reimplemention of the kfifo API

On Tue, Apr 20, 2010 at 10:35:47PM +0200, Stefani Seibold wrote:
> >  
> > > This are the features which are currently not used in the kernel:
> > > 
> > > kfifo_to_user()
> > > kfifo_from_user()
> > > kfifo_dma_....() macros
> > > kfifo_esize()
> > > kfifo_recsize()
> > > kfifo_put()
> > > kfifo_get()
> > > the fixed size record elements, exclude "unsigned char" fifo's and
> > > the variable size records fifo's
> > 
> > If you have features that have no users, why add them?  Do you think
> > that some drivers need/want these features?
> > 
> 
> Some developers ask me for this features, so i am a nice girl and
> implemented it. Especially the kfifo_to_user() and kfifo_from_user() was
> desired and is IMHO very useful. 
> 
> kfifo_put(), kfifo_get(), kfifo_esize() and kfifo_recsize() didn't coast
> anything, because there are only macros.
> 
> Andrew agreed that we add this for a given time period, and have a look
> what happens. The code overhead is not to much.
> 
> It is a chicken and egg problem: If we do not provide this features,
> nobody can use it and everyone will write it's own implementation.

Ok, fair enough.

thanks,

greg k-h
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