On Fri, 5 Jun 2020 12:46:55 +0100 Catalin Marinas <catalin.marinas@xxxxxxx> wrote: > On Fri, Jun 05, 2020 at 11:08:13AM +0100, Catalin Marinas wrote: > > This patch causes a kernel panic on arm64 (and possibly powerpc, I > > haven't tried). arm64 still uses the 5level-fixup.h and pud_alloc() > > checks for the empty p4d with pgd_none() instead of p4d_none(). > > Ah, should have checked the list first > (https://lore.kernel.org/linux-mm/20200604074446.23944-1-joro@xxxxxxxxxx/). > Sorry about that. Can you confirm that the merge of Mike's 5level_hack zappage has fixed the arm64 wontboot?