* Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx> wrote:
> +#ifdef CONFIG_X86_5LEVEL
> +
> +/*
> + * PGDIR_SHIFT determines what a top-level page table entry can map
> + */
> +#define PGDIR_SHIFT 48
> +#define PTRS_PER_PGD 512
> +
> +/*
> + * 4rd level page in 5-level paging case
4th.
> + */
> +#define P4D_SHIFT 39
> +#define PTRS_PER_P4D 512
> +#define P4D_SIZE (_AC(1, UL) << P4D_SHIFT)
> +#define P4D_MASK (~(P4D_SIZE - 1))
> +
> +#else /* CONFIG_X86_5LEVEL */
Single space suffices before teh comment.
> +
> /*
> * PGDIR_SHIFT determines what a top-level page table entry can map
> */
> #define PGDIR_SHIFT 39
> #define PTRS_PER_PGD 512
>
> +#endif /* CONFIG_X86_5LEVEL */
Ditto.
> +#ifdef CONFIG_X86_5LEVEL
> +/**
> + * p4d_set_huge - setup kernel P4D mapping
> + *
> + * No 512GB pages yet -- always return 0
> + *
> + * Returns 1 on success and 0 on failure.
> + */
> +int p4d_set_huge(p4d_t *p4d, phys_addr_t addr, pgprot_t prot)
> +{
> + return 0;
> +}
The last comment line can be deleted I suppose.
Thanks,
Ingo
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