Make set_recommended_min_free_kbytes() callable from outside
khugepaged.c by removing the static qualifier and adding a
declaration in mm/internal.h.

This allows callers that change THP settings to recalculate
watermarks without going through start_stop_khugepaged().

Suggested-by: Lorenzo Stoakes (Oracle) <ljs@kernel.org>
Signed-off-by: Breno Leitao <leitao@debian.org>
Reviewed-by: Lorenzo Stoakes (Oracle) <ljs@kernel.org>
---
 mm/internal.h   | 5 +++++
 mm/khugepaged.c | 2 +-
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/mm/internal.h b/mm/internal.h
index cb0af847d7d99..7bd768e367793 100644
--- a/mm/internal.h
+++ b/mm/internal.h
@@ -623,6 +623,11 @@ int user_proactive_reclaim(char *buf,
  */
 pmd_t *mm_find_pmd(struct mm_struct *mm, unsigned long address);
 
+/*
+ * in mm/khugepaged.c
+ */
+void set_recommended_min_free_kbytes(void);
+
 /*
  * in mm/page_alloc.c
  */
diff --git a/mm/khugepaged.c b/mm/khugepaged.c
index 1dd3cfca610db..56a41c21b44c9 100644
--- a/mm/khugepaged.c
+++ b/mm/khugepaged.c
@@ -2630,7 +2630,7 @@ static int khugepaged(void *none)
 	return 0;
 }
 
-static void set_recommended_min_free_kbytes(void)
+void set_recommended_min_free_kbytes(void)
 {
 	struct zone *zone;
 	int nr_zones = 0;

-- 
2.47.3

On 3/9/26 12:07, Breno Leitao wrote:
> Make set_recommended_min_free_kbytes() callable from outside
> khugepaged.c by removing the static qualifier and adding a
> declaration in mm/internal.h.
> 
> This allows callers that change THP settings to recalculate
> watermarks without going through start_stop_khugepaged().
> 
> Suggested-by: Lorenzo Stoakes (Oracle) <ljs@kernel.org>
> Signed-off-by: Breno Leitao <leitao@debian.org>
> Reviewed-by: Lorenzo Stoakes (Oracle) <ljs@kernel.org>
> ---
>  mm/internal.h   | 5 +++++
>  mm/khugepaged.c | 2 +-
>  2 files changed, 6 insertions(+), 1 deletion(-)
> 
> diff --git a/mm/internal.h b/mm/internal.h
> index cb0af847d7d99..7bd768e367793 100644
> --- a/mm/internal.h
> +++ b/mm/internal.h
> @@ -623,6 +623,11 @@ int user_proactive_reclaim(char *buf,
>   */
>  pmd_t *mm_find_pmd(struct mm_struct *mm, unsigned long address);
>  
> +/*
> + * in mm/khugepaged.c
> + */
> +void set_recommended_min_free_kbytes(void);
> +
>  /*
>   * in mm/page_alloc.c
>   */
> diff --git a/mm/khugepaged.c b/mm/khugepaged.c
> index 1dd3cfca610db..56a41c21b44c9 100644
> --- a/mm/khugepaged.c
> +++ b/mm/khugepaged.c
> @@ -2630,7 +2630,7 @@ static int khugepaged(void *none)
>  	return 0;
>  }
>  
> -static void set_recommended_min_free_kbytes(void)
> +void set_recommended_min_free_kbytes(void)
>  {
>  	struct zone *zone;
>  	int nr_zones = 0;
> 

Acked-by: David Hildenbrand (Arm) <david@kernel.org>

-- 
Cheers,

David