Hi Geert, > On Mar 24, 2015, at 07:50 , Geert Uytterhoeven <geert@xxxxxxxxxxxxxx> wrote: > > Hi Pantelis, Grant, > > On Fri, Mar 20, 2015 at 12:39 PM, Pantelis Antoniou > <pantelis.antoniou@xxxxxxxxxxxx> wrote: >>> On Mar 19, 2015, at 21:18 , Grant Likely <grant.likely@xxxxxxxxxxxx> wrote: >>> >>> On Tue, 16 Dec 2014 14:11:31 +0200 >>> , Pantelis Antoniou <pantelis.antoniou@xxxxxxxxxxxx> >>> wrote: >>>> A nice side-effect of the changes in DTC for supporting overlays >>>> is that it is now possible to do dependency tracking of platform >>>> devices automatically. >>>> >>>> This patch implements dependency aware probe order for users >>>> of of_platform_populate. >>>> >>>> There are no changes in the syntax of the DTS bindings, the >>>> dependency is generated automatically by the use of phandle >>>> references. >>> >>> Do you have measurements showing improvement? Conceptually, I don't have >>> a problem with having a small scale solution like this, but I want proof >>> that it actively makes things better, and is worth the extra complexity. >>> It's not an easy block of code to understand. >>> >> >> I will be the first to admit that the code it’s a bit hard to follow, but >> that’s the nature of trees and recursion. >> >> FWIW I’ve been booting with this applied for a month with no adverse effects, >> besides the fact that there dependency cycles which I would file as a bug. > > IIUC, this would fix the issue I worked around in "ARM: shmobile: r8a73a4: > Move pfc node to work around probe ordering bug"? > https://git.kernel.org/cgit/linux/kernel/git/horms/renesas.git/commit/?h=r8a73a4-ccf-and-multiplatform-for-v4.1&id=e4ba0a9bddff3ba52cec100414d2f178440efc91 > A victim^Wtester! Yeah, it’s supposed to do that, but no guarantees, this is an RFC. I would be happy to know if it solves your problem or not, please keep me in the loop. > I'll give it a try when I'm back from ELC... > > Gr{oetje,eeting}s, > > Geert > Regards — Pantelis > -- > Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx > > In personal conversations with technical people, I call myself a hacker. But > when I'm talking to journalists I just say "programmer" or something like that. > -- Linus Torvalds > -- > To unsubscribe from this list: send the line "unsubscribe devicetree" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
