Re: [PATCH v6 2/2] mm: Convert vmemmap_p?d_populate() to static functions

[Chengkaitao <pilgrimtao@gmail.com>]

Hi Andrew Morton，

I noticed this patch was dropped; the failure report is here:
https://lore.kernel.org/all/202603251338.grra8xt7-lkp@intel.com/#R

Could this be a false positive? The series has two patches: the first
one already removed references to vmemmap_p?d_populate() on sparc; see:
https://lore.kernel.org/all/20260201063532.44807-3-pilgrimtao@gmail.com/T/#mefaa36aeff173d08f0508cd44be46e830c067fe9

Might the build error be because only the second patch was applied,
without the first?

On Sun, Feb 1, 2026 at 2:35 PM chengkaitao <pilgrimtao@gmail.com> wrote:
>
> From: Chengkaitao <chengkaitao@kylinos.cn>
>
> Since the vmemmap_p?d_populate functions are unused outside the mm
> subsystem, we can remove their external declarations and convert
> them to static functions.
>
> Signed-off-by: Chengkaitao <chengkaitao@kylinos.cn>
> ---
>  include/linux/mm.h  |  7 -------
>  mm/sparse-vmemmap.c | 10 +++++-----
>  2 files changed, 5 insertions(+), 12 deletions(-)
>
> diff --git a/include/linux/mm.h b/include/linux/mm.h
> index f0d5be9dc736..10a0664b4ce2 100644
> --- a/include/linux/mm.h
> +++ b/include/linux/mm.h
> @@ -4238,13 +4238,6 @@ unsigned long section_map_size(void);
>  struct page * __populate_section_memmap(unsigned long pfn,
>                 unsigned long nr_pages, int nid, struct vmem_altmap *altmap,
>                 struct dev_pagemap *pgmap);
> -pgd_t *vmemmap_pgd_populate(unsigned long addr, int node);
> -p4d_t *vmemmap_p4d_populate(pgd_t *pgd, unsigned long addr, int node);
> -pud_t *vmemmap_pud_populate(p4d_t *p4d, unsigned long addr, int node);
> -pmd_t *vmemmap_pmd_populate(pud_t *pud, unsigned long addr, int node);
> -pte_t *vmemmap_pte_populate(pmd_t *pmd, unsigned long addr, int node,
> -                           struct vmem_altmap *altmap, unsigned long ptpfn,
> -                           unsigned long flags);
>  void *vmemmap_alloc_block(unsigned long size, int node);
>  struct vmem_altmap;
>  void *vmemmap_alloc_block_buf(unsigned long size, int node,
> diff --git a/mm/sparse-vmemmap.c b/mm/sparse-vmemmap.c
> index 37522d6cb398..67f9a08c2376 100644
> --- a/mm/sparse-vmemmap.c
> +++ b/mm/sparse-vmemmap.c
> @@ -151,7 +151,7 @@ void __meminit vmemmap_verify(pte_t *pte, int node,
>                         start, end - 1);
>  }
>
> -pte_t * __meminit vmemmap_pte_populate(pmd_t *pmd, unsigned long addr, int node,
> +static pte_t * __meminit vmemmap_pte_populate(pmd_t *pmd, unsigned long addr, int node,
>                                        struct vmem_altmap *altmap,
>                                        unsigned long ptpfn, unsigned long flags)
>  {
> @@ -195,7 +195,7 @@ static void * __meminit vmemmap_alloc_block_zero(unsigned long size, int node)
>         return p;
>  }
>
> -pmd_t * __meminit vmemmap_pmd_populate(pud_t *pud, unsigned long addr, int node)
> +static pmd_t * __meminit vmemmap_pmd_populate(pud_t *pud, unsigned long addr, int node)
>  {
>         pmd_t *pmd = pmd_offset(pud, addr);
>         if (pmd_none(*pmd)) {
> @@ -208,7 +208,7 @@ pmd_t * __meminit vmemmap_pmd_populate(pud_t *pud, unsigned long addr, int node)
>         return pmd;
>  }
>
> -pud_t * __meminit vmemmap_pud_populate(p4d_t *p4d, unsigned long addr, int node)
> +static pud_t * __meminit vmemmap_pud_populate(p4d_t *p4d, unsigned long addr, int node)
>  {
>         pud_t *pud = pud_offset(p4d, addr);
>         if (pud_none(*pud)) {
> @@ -221,7 +221,7 @@ pud_t * __meminit vmemmap_pud_populate(p4d_t *p4d, unsigned long addr, int node)
>         return pud;
>  }
>
> -p4d_t * __meminit vmemmap_p4d_populate(pgd_t *pgd, unsigned long addr, int node)
> +static p4d_t * __meminit vmemmap_p4d_populate(pgd_t *pgd, unsigned long addr, int node)
>  {
>         p4d_t *p4d = p4d_offset(pgd, addr);
>         if (p4d_none(*p4d)) {
> @@ -234,7 +234,7 @@ p4d_t * __meminit vmemmap_p4d_populate(pgd_t *pgd, unsigned long addr, int node)
>         return p4d;
>  }
>
> -pgd_t * __meminit vmemmap_pgd_populate(unsigned long addr, int node)
> +static pgd_t * __meminit vmemmap_pgd_populate(unsigned long addr, int node)
>  {
>         pgd_t *pgd = pgd_offset_k(addr);
>         if (pgd_none(*pgd)) {
> --
> 2.50.1 (Apple Git-155)
>

-- 
Yours,
Chengkaitao