On Mon, Jun 11, 2018 at 06:35:48PM +0000, Alexander Kurz wrote: > Hi Sascha, > On Mon, 11 Jun 2018, Sascha Hauer wrote: > > > Being able to free the live device tree seemed like a good idea in the > > early days of device tree support when the first boards were brought up. > > It turned out to be illusory that noone stores pointers to the live tree > > which become invalid when oftree -f is executed. Enough people stumbled > > upon crashed boards with this option, so remove it finally. > > oftree -f is still in use in boot scripts, e.g. for the kindle-mx50, > and at least one other board. > The usecase for the kindle-mx50 is > * DT based barebox > * ATAGs dependent antiquated, non upgradeable kernel > > start_linux() (arch/arm/lib32/armlinux.c) wont do setup_tags() if there > still exists an oftree. > If there is an alternative way to make boot issue > ATAGs, removing the -f option would be fine. > > May I mention an old (rejected) proposal about this issue > http://lists.infradead.org/pipermail/barebox/2016-December/028633.html > > Also note: it's still in Documentation/user/devicetree.rst Thanks for noting. I was a bit enthusiastic that I finally found the energy to kill this option and forgot why I haven't done it earlier ;) I just sent an updated series which should solve the issue of being able to do a ATAG boot. Sascha -- Pengutronix e.K. | | Industrial Linux Solutions | http://www.pengutronix.de/ | Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 | _______________________________________________ barebox mailing list barebox@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/barebox
