On Wed, Nov 14, 2018 at 01:39:19PM +0000, Steve Capper wrote:
> diff --git a/arch/arm64/include/asm/pgalloc.h b/arch/arm64/include/asm/pgalloc.h
> index 2e05bcd944c8..56c3ccabeffe 100644
> --- a/arch/arm64/include/asm/pgalloc.h
> +++ b/arch/arm64/include/asm/pgalloc.h
> @@ -27,7 +27,11 @@
> #define check_pgt_cache() do { } while (0)
>
> #define PGALLOC_GFP (GFP_KERNEL | __GFP_ZERO)
> +#ifdef CONFIG_ARM64_52BIT_VA
> +#define PGD_SIZE ((1 << (52 - PGDIR_SHIFT)) * sizeof(pgd_t))
> +#else
> #define PGD_SIZE (PTRS_PER_PGD * sizeof(pgd_t))
> +#endif
This introduces a mismatch between PTRS_PER_PGD and PGD_SIZE. While it
happens not to corrupt any memory (we allocate a full page for pgdirs),
the compiler complains about the memset() in map_entry_trampoline()
since tramp_pg_dir[] is smaller.
--
Catalin
