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mm/mm_slot.h: add a helper function mm_slot_remove

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Patch series "Two small patches to clean up mm/mm_slot.h", v3.

mm_slot.h is mainly used by THP and KSM.

Patch 1 introduces mm_slot_remove() to abstract the common
hash_del() + list_del() sequence used in both khugepaged and KSM.

Patch 2 adds a comment explaining why mm_slot_lookup/insert cannot
be converted to static inline functions.


This patch (of 2):

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.

Link: https://lore.kernel.org/202607140924549782dUh3YBPmy8g1NDMK2zIW@zte.com.cn
Link: https://lore.kernel.org/20260714092622583ayzGzGYSjAareKKHt_T91@zte.com.cn
Signed-off-by: xu xin <xu.xin16@zte.com.cn>
Reviewed-by: Nico Pache <npache@redhat.com>
Reviewed-by: Zi Yan <ziy@nvidia.com>
Reviewed-by: Barry Song <baohua@kernel.org>
Acked-by: David Hildenbrand (Arm) <david@kernel.org>
Reviewed-by: Lorenzo Stoakes (ARM) <ljs@kernel.org>
Reviewed-by: SJ Park <sj@kernel.org>
Cc: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: Chengming Zhou <chengming.zhou@linux.dev>
Cc: Dev Jain <dev.jain@arm.com>
Cc: Lance Yang <lance.yang@linux.dev>
Cc: Ryan Roberts <ryan.roberts@arm.com>
Cc: Wang Yaxin <wang.yaxin@zte.com.cn>
Cc: Qi Zheng <qi.zheng@linux.dev>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
xu xin 2026-07-14 09:26:22 +08:00 • committed by Andrew Morton
commit eed8da1ff6
3 changed files with 10 additions and 10 deletions
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