Re: [PATCH v2 1/2] mm/mm_slot.h: add a helper function mm_slot_remove

[SJ Park <sj@kernel.org>]

On Mon, 13 Jul 2026 14:37:07 +0800 (CST) <xu.xin16@zte.com.cn> wrote:

> From: xu xin <xu.xin16@zte.com.cn>
> 
> Both THP and KSM manage per-mm scanning slots using the mm_slot
> structure. The slot is kept in a hash table and a list, and removal from
> both containers requires the same two operations: hash_del() and
> list_del().
> 
> Introduce mm_slot_remove() to abstract the common hash_del() + list_del()
> sequence used in both khugepaged and KSM.
> 
> No functional change is intended.

Looks good and clean to me!

> 
> Signed-off-by: xu xin <xu.xin16@zte.com.cn>

Reviewed-by: SJ Park <sj@kernel.org>

[...]
> --- a/mm/mm_slot.h
> +++ b/mm/mm_slot.h
> @@ -52,4 +52,9 @@ static inline void mm_slot_free(struct kmem_cache *cache, void *objp)
>  	hash_add(_hashtable, &_mm_slot->hash, (unsigned long)_mm);	       \
>  })
> 
> +static inline void mm_slot_remove(struct mm_slot *slot)
> +{
> +	hash_del(&slot->hash);
> +	list_del(&slot->mm_node);
> +}
>  #endif /* _LINUX_MM_SLOT_H */

I'd prefer keep having the one blank line bfore the #endif.  Definitely not a
blocker but just thinking loud.


Thanks,
SJ

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