Re: [PATCH] block: support embedded device command line partition

[Andrew Morton <akpm@linux-foundation.org>]

On Tue, 6 Aug 2013 10:53:01 +0000 Caizhiyong <caizhiyong@huawei.com> wrote:

> > -----Original Message-----
> > From: Andrew Morton [mailto:akpm@linux-foundation.org]
> > Sent: Tuesday, August 06, 2013 6:22 AM
> > To: Caizhiyong
> > Cc: Karel Zak; linux-kernel@vger.kernel.org; Wanglin (Albert); Quyaxin; Jens Axboe;
> > David Woodhouse; Marius Groeger
> > Subject: Re: [PATCH] block: support embedded device command line partition
> > 
> > On Sat, 3 Aug 2013 09:57:04 +0000 Caizhiyong <caizhiyong@huawei.com> wrote:
> > 
> > > From: Cai Zhiyong <caizhiyong@huawei.com>
> > >
> > > Read block device partition table from command line.
> > > The partition used for fixed block device (eMMC) embedded device.
> > > It is no MBR, save storage space. Bootloader can be easily accessed by
> > > absolute address of data on the block device.
> > > Users can easily change the partition.
> > >
> > > This code reference MTD partition, source "drivers/mtd/cmdlinepart.c"
> > > About the partition verbose reference
> > "Documentation/block/cmdline-partition.txt"
> > >
> > 
> > Seems OK to me.
> > 
> > The obvious question is: can we consolidate this with
> > drivers/mtd/cmdlinepart.c in some fashion so the kernel doesn't have
> > two parsers which do the same thing?
> 
> I will move the parser to "lib/cmdline.c".
> 

block/cmdline.c is an appropriate place for block-subsystem library
code.

But simply moving the file doesn't achieve anything.  To prove that the
code is indeed library-style code, we should actually *use* it in some
client code.  Such as MTD!