On Fri, 3 Jun 2022 at 22:47, Arnd Bergmann <arnd@xxxxxxxx> wrote: > > On Fri, Jun 3, 2022 at 9:11 PM Yegor Yefremov > <yegorslists@xxxxxxxxxxxxxx> wrote: > > > > With compiled-in drivers the system doesn't stall. All other tests and > > related outputs will come next week. > > Ah, nice! > > It's probably a reasonable assumption that the smp-patched get_current() > is (at least sometimes) broken in modules but working in the kernel itself. > I suppose that means in the worst case we can hot-fix the issue by > having an 'extern' version of get_current() for the case of > armv6+smp+module ;-) > I've coded something up along those lines, and pushed it to my am335x-stall-test branch. > Maybe start with the ".long 0xe7f001f2" hack I suggested in my last > mail. If that gives you an oops for the module case, then we know > that the patching doesn't work at all and you don't have to try anything > else, otherwise it's more likely that an incorrect instruction sequence > is patched in. > Yeah, I'd be really surprised if the patching misses some occurrences, so I have no clue what is going on here. Yegor, can you please try my branch with the original config (i.e., slcan and ftdio as modules) https://git.kernel.org/pub/scm/linux/kernel/git/ardb/linux.git/log/?h=am335x-stall-test
