Re: [PATCH] mm: add some missing includes to mm-local headers

[Baoquan He <baoquan.he@linux.dev>]

On 08/04/26 at 11:08am, Lorenzo Stoakes (ARM) wrote:
> There are a number of internal headers local to mm/ which reference
> functions and data types without including the relevant headers.
> 
> mm/vma.h is a special case that intentionally does not include additional
> headers, but the others are not.
> 
> This breaks tooling like clangd (which is where I noticed this), though the
> build is OK due to the C files including the headers happening to include
> required dependencies.
> 
> It's better to be explicit about dependencies anyway, so add the missing
> includes and fix clangd as a bonus.
> 
> Signed-off-by: Lorenzo Stoakes (ARM) <ljs@kernel.org>
> ---
>  mm/cma.h           | 1 +
>  mm/hugetlb_cma.h   | 2 ++
>  mm/memcontrol-v1.h | 1 +
>  mm/pgalloc-track.h | 3 +++
>  mm/shuffle.h       | 2 ++
>  mm/swap.h          | 1 +
>  mm/vmalloc.h       | 2 ++
>  7 files changed, 12 insertions(+)

Reviewed-by: Baoquan He <baoquan.he@linux.dev>

> 
> diff --git a/mm/cma.h b/mm/cma.h
> index c70180c36559..ab6d39898ea5 100644
> --- a/mm/cma.h
> +++ b/mm/cma.h
> @@ -2,6 +2,7 @@
>  #ifndef __MM_CMA_H__
>  #define __MM_CMA_H__
>  
> +#include <linux/cma.h>
>  #include <linux/debugfs.h>
>  #include <linux/kobject.h>
>  
> diff --git a/mm/hugetlb_cma.h b/mm/hugetlb_cma.h
> index 3aa483573d17..730b2b4965b6 100644
> --- a/mm/hugetlb_cma.h
> +++ b/mm/hugetlb_cma.h
> @@ -2,6 +2,8 @@
>  #ifndef _LINUX_HUGETLB_CMA_H
>  #define _LINUX_HUGETLB_CMA_H
>  
> +#include <linux/hugetlb.h>
> +
>  #ifdef CONFIG_CMA
>  void hugetlb_cma_free_frozen_folio(struct folio *folio);
>  struct folio *hugetlb_cma_alloc_frozen_folio(int order, gfp_t gfp_mask,
> diff --git a/mm/memcontrol-v1.h b/mm/memcontrol-v1.h
> index 0f703f239c80..1e394269c613 100644
> --- a/mm/memcontrol-v1.h
> +++ b/mm/memcontrol-v1.h
> @@ -4,6 +4,7 @@
>  #define __MM_MEMCONTROL_V1_H
>  
>  #include <linux/cgroup-defs.h>
> +#include <linux/memcontrol.h>
>  
>  /* Cgroup v1 and v2 common declarations */
>  
> diff --git a/mm/pgalloc-track.h b/mm/pgalloc-track.h
> index e9e879de8649..1a6de1358a21 100644
> --- a/mm/pgalloc-track.h
> +++ b/mm/pgalloc-track.h
> @@ -2,6 +2,9 @@
>  #ifndef _LINUX_PGALLOC_TRACK_H
>  #define _LINUX_PGALLOC_TRACK_H
>  
> +#include <linux/mm.h>
> +#include <linux/pgtable.h>
> +
>  #if defined(CONFIG_MMU)
>  static inline p4d_t *p4d_alloc_track(struct mm_struct *mm, pgd_t *pgd,
>  				     unsigned long address,
> diff --git a/mm/shuffle.h b/mm/shuffle.h
> index 61bbcddeeee6..11bec7521ab8 100644
> --- a/mm/shuffle.h
> +++ b/mm/shuffle.h
> @@ -2,7 +2,9 @@
>  // Copyright(c) 2018 Intel Corporation. All rights reserved.
>  #ifndef _MM_SHUFFLE_H
>  #define _MM_SHUFFLE_H
> +
>  #include <linux/jump_label.h>
> +#include <linux/mmzone.h>
>  
>  #define SHUFFLE_ORDER MAX_PAGE_ORDER
>  
> diff --git a/mm/swap.h b/mm/swap.h
> index d077e5893a42..ec580c713204 100644
> --- a/mm/swap.h
> +++ b/mm/swap.h
> @@ -5,6 +5,7 @@
>  #include <linux/atomic.h> /* for atomic_long_t */
>  #include <linux/mm.h> /* for PAGE_SHIFT */
>  #include <linux/memcontrol.h> /* for mem_cgroup_swappiness() */
> +#include <linux/swap.h> /* for MAX_SWAPFILES_SHIFT, struct swap_info_struct */
>  
>  struct mempolicy;
>  struct swap_iocb;
> diff --git a/mm/vmalloc.h b/mm/vmalloc.h
> index dcfe30eaa80c..8866ddcff668 100644
> --- a/mm/vmalloc.h
> +++ b/mm/vmalloc.h
> @@ -5,6 +5,8 @@
>  #ifndef __MM_VMALLOC_H
>  #define __MM_VMALLOC_H
>  
> +#include <linux/vmalloc.h>
> +
>  #ifdef CONFIG_MMU
>  void __init vmalloc_init(void);
>  int __must_check vmap_pages_range_noflush(unsigned long addr, unsigned long end,
> 
> ---
> base-commit: e47602c51d20a93fa1711ed896dc9480de4374d9
> change-id: 20260804-fix-some-local-headers-0ebc15f34c72
> 
> Cheers,
> -- 
> Lorenzo Stoakes (ARM) <ljs@kernel.org>
>