On Tue, Jan 07, 2020 at 09:52:20AM -0500, Mikulas Patocka wrote: > > On Mon, 9 Dec 2019, Jeroen Roovers wrote: > > > On Mon, 9 Dec 2019 20:22:17 +0200 > > Meelis Roos <mroos@xxxxxxxx> wrote: > > > > > I tried 5.5-rc1 on RP3440 and got a surprise panic on boot (5.4 > > > worked): > > > > Ah, I was going to reported this, too. > > > > > mem auto-init: stack:off, heap alloc:off, heap free:off > > > Memory: 12348004K/12580864K available (6438K kernel code, 2148K > > > rwdata, 954K rodata, 1193K init, 500K bss, 232860K reserved, 0K > > > cma-reserved) > > > > I see an additional message after this: > > > > random: get_random_u64 called from __kmem_cache_create+0x70/0x660 with > > crng_init=0 > > > > And then the same or similar enough backtrace. > > > > > > Regards, > > jer > > Hi > > I also have this panic. I bisected it and it is caused by the patch > d96885e277b5edcd1e474e8b1579005163f23dbe. My guess would be that pgd is not populated after the change. Can you please check if the below hack fixes the crash? diff --git a/arch/parisc/mm/init.c b/arch/parisc/mm/init.c index ddca8287d43b..354cf060b67f 100644 --- a/arch/parisc/mm/init.c +++ b/arch/parisc/mm/init.c @@ -401,7 +401,7 @@ static void __init map_pages(unsigned long start_vaddr, pmd = (pmd_t *) __pa(pmd); } - pgd_populate(NULL, pg_dir, __va(pmd)); + pud_populate(NULL, (pud_t *)pg_dir, __va(pmd)); #endif pg_dir++; > Unfortunatelly, the patch can't be reverted because pre-patch code depends > on the file asm-generic/4level-fixup.h that is missing in the 5.5-rc > branch. > > Mikulas -- Sincerely yours, Mike.
