linux-kernel - Re: linux-next: build failure after merge of the driver-core tree

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Date:	Tue, 18 Mar 2014 11:16:48 +1100
From:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
To:	Greg KH <greg@...ah.com>
Cc:	Stephen Rothwell <sfr@...b.auug.org.au>,
	Mark Brown <broonie@...nel.org>,
	Stewart Smith <stewart@...ux.vnet.ibm.com>,
	Tejun Heo <tj@...nel.org>, linux-next@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: linux-next: build failure after merge of the driver-core tree

On Mon, 2014-03-17 at 14:56 -0700, Greg KH wrote:

> No you can't, sorry.
> 
> And this seems like a huge abuse of sysfs, you better be using binary
> sysfs files for your log data...
> 
> Do you have a pointer to where you document this sysfs api in
> Documentation/ABI/ ?

Yes, the patch adds the documentation along with the facility, I've
attached the doc file to this email.

This is a wrapper on top of firmware interfaces, in a way we are
following ACPI precedent of exposing a bunch of things via sysfs, which
also happen to be a simple and very convenient way of doing it.

The log itself is a binary attribute in PEL format (or SEL when we
support that), we have a userspace parser.

> > Now regarding the practicals of sorting out our trees, Stephen suggested
> > that rather than doing anything on my side (heh, I like that !), you
> > should revert the last patch of the series, the one removing the old
> > API, in your tree.
> > 
> > It can then be re-applied later around rc1.
> 
> I'll look to see if we can do that, let me dig it up out of my tree...

Thanks. That's how Stephen is fixing it up in -next at the moment.

Cheers,
Ben.

> thanks,
> 
> greg k-h
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