Thread (47 messages) 47 messages, 9 authors, 2014-12-04
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[PATCH] ARM: OMAP2+: Warn about deprecated legacy booting mode

From: Pali Rohár <hidden>
Date: 2014-11-26 18:57:08
Also in: linux-omap

On Wednesday 26 November 2014 19:19:35 Tony Lindgren wrote:
* Pavel Machek [off-list ref] [141126 09:31]:
quoted
On Tue 2014-10-28 01:01:38, Aaro Koskinen wrote:
quoted
Hi,

On Mon, Oct 27, 2014 at 01:00:09PM -0700, Tony Lindgren 
wrote:
quoted
quoted
quoted
+
+	if (!of_have_populated_dt())
+		pr_warn("WARNING: legacy booting deprecated, please
update to boot with .dts\n"); +
Maybe use WARN so that the warning is more verbose and
kernel gets tainted?
Well.. Pali still has regression where /proc/cpuinfo changes
in a way that breaks existing userspace, when dt is used on
N900.

And rmk was less then helpfull...
Maybe Pali can try to restart that discussion? To me it seems
the /proc/cpuinfo should be the same as it's a user
interface. Sorry forgot the details of the previous
discussion..
Yes, two days ago I again wrote emails about this problem...

E.g. one of them, see: https://lkml.org/lkml/2014/11/24/774
And with which app was that? Sorry I forgot..
More applications/libraries for N900 which running on Maemo 5 
system. Some of them are Nokia proprietary, some of them are open 
source and some are mine.

Basically problem is that non DT boot provides this info in 
/proc/cpuinfo:

Hardware        : Nokia RX-51 board
Revision        : 0012

New DT boot provides this:

Hardware        : Generic OMAP3 (Flattened Device Tree)
Revision        : 0000
It's weird that it's not been an issue for other though?
quoted
Should we maybe solve that before adding backtraces to our
boot messages?
With this warning we want to notify the people actually using
mainline kernel on omap3 that they should update their
systems. And also let us know on this list about the
regressions, so I think that's quite valuable.

Regards,

Tony
-- 
Pali Roh?r
pali.rohar at gmail.com
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