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/). Please ignore my patch then. -- Catalin