On Mon, Dec 14, 2020 at 10:21 AM David Hildenbrand <david@xxxxxxxxxx> wrote: > > ARM SoC folks: please apply this directly for fixes. > > Can we come up with a Fixes: tag or has this been broken forever? > (assuming modern boot loaders) It's been broken forever :/ > > David: just FYI if you run into more of these type of > > regressions. Actually the patch is unintentionally good > > at smoking out other bugs :D > > Thanks for CCing - I'm adding some people that ran into similar issues, > but not sure if the other bugreports are related (or have similar root > causes). Yeah we first were convinced there was something wrong with the patch you made but I read it over and over again and there is nothing wrong with it at all. It just alters the behaviour pattern of memory management in some apparently drastic ways. After a lot of silent crashes I finally got an external abort with a reasonable backtrace showing the PTE pointing to this modem memory and then we figured it out. Yours, Linus Walleij
