linux-kernel - Re: [PATCH v5 1/3] mtd: nand: gpmi: add gpmi_move

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Message-ID: <20141130153918.GA14834@localhost.localdomain>
Date:	Sun, 30 Nov 2014 23:39:26 +0800
From:	Huang Shijie <shijie8@...il.com>
To:	Boris Brezillon <boris.brezillon@...e-electrons.com>
Cc:	Brian Norris <computersforpeace@...il.com>,
	David Woodhouse <dwmw2@...radead.org>,
	linux-mtd@...ts.infradead.org, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	Mike Voytovich <mvoytovich@...pal.com>,
	Roy Lee <roylee@...pal.com>
Subject: Re: [PATCH v5 1/3] mtd: nand: gpmi: add gpmi_move_bits function

On Sun, Nov 30, 2014 at 09:55:00AM +0100, Boris Brezillon wrote:
> Hi Brian,
> 
> On Sun, 30 Nov 2014 00:11:10 -0800
> Brian Norris <computersforpeace@...il.com> wrote:
> 
> > On Wed, Nov 26, 2014 at 05:57:08PM +0100, Boris Brezillon wrote:
> > > On Wed, 26 Nov 2014 17:53:11 +0100 Boris Brezillon <boris.brezillon@...e-electrons.com> wrote:
> > > > +/**
> > > > + * gpmi_move_bits - move bits from one memory region to another
> > > > + * @dst: destination buffer
> > > > + * @dst_bit_off: bit offset we're starting to write at
> > > > + * @src: source buffer
> > > > + * @src_bit_off: bit offset we're starting to read from
> > > > + * @nbits: number of bits to copy
> > > > + *
> > > > + * This functions copies bits from one memory region to another, and is used by
> > > > + * the GPMI driver to copy ECC sections which are not guaranteed to be byte
> > > > + * aligned.
> > > 
> > > I forgot to add that src and dst should not overlap, otherwise it won't
> > > work...
> > 
> > Hmm, normally that's implied for copy-like operations. But since you
> > named this function "move" (rather than "copy" or "cpy"), that's a
> > little less clear.
> 
> Indeed, that's a good point.
> 
> > 
> > Did you have a good reason for the "move" name? If not, maybe it's worth
> > changing.
> 
> No, I don't, and I'd prefer changing the name than implementing a non
> destructive move function.
> 
> I'll send a new version with this change.
Please add my tested-by.

Tested-by: Huang Shijie <shijie8@...il.com>
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