On Sat, Jul 02, 2022 at 04:00:20PM +0800, Huacai Chen wrote:
> From: Feiyang Chen <chenfeiyang@xxxxxxxxxxx>
>
> Generalise vmemmap_populate_hugepages() so ARM64 & X86 & LoongArch can
> share its implementation.
>
> Signed-off-by: Feiyang Chen <chenfeiyang@xxxxxxxxxxx>
> Signed-off-by: Huacai Chen <chenhuacai@xxxxxxxxxxx>
> ---
> arch/arm64/mm/mmu.c | 53 ++++++-----------------
> arch/loongarch/mm/init.c | 63 ++++++++-------------------
> arch/x86/mm/init_64.c | 92 ++++++++++++++--------------------------
> include/linux/mm.h | 6 +++
> mm/sparse-vmemmap.c | 54 +++++++++++++++++++++++
> 5 files changed, 124 insertions(+), 144 deletions(-)
>
> diff --git a/arch/arm64/mm/mmu.c b/arch/arm64/mm/mmu.c
> index 626ec32873c6..b080a65c719d 100644
> --- a/arch/arm64/mm/mmu.c
> +++ b/arch/arm64/mm/mmu.c
> @@ -1158,49 +1158,24 @@ int __meminit vmemmap_populate(unsigned long start, unsigned long end, int node,
> return vmemmap_populate_basepages(start, end, node, altmap);
> }
> #else /* !ARM64_KERNEL_USES_PMD_MAPS */
> +void __meminit vmemmap_set_pmd(pmd_t *pmd, void *p, int node,
> + unsigned long addr, unsigned long next)
> +{
> + pmd_set_huge(pmd, __pa(p), __pgprot(PROT_SECT_NORMAL));
> +}
> +
> +int __meminit vmemmap_check_pmd(pmd_t *pmd, int node, unsigned long addr,
> + unsigned long next)
> +{
> + vmemmap_verify((pte_t *)pmd, node, addr, next);
> + return 1;
> +}
nit, but please can you use 'pmdp' instead of 'pmd' for the pointers? We're
pretty consistent elsewhere for arch/arm64 and it makes the READ_ONCE()
usage easier to follow once functions end up loading the entry.
Thanks,
Will
