[PATCH] mm/damon/api: remove unused NR_DAMOS_* enumerators

[PATCH] mm/damon/api: remove unused NR_DAMOS_* enumerators

[Zenghui Yu]

From: "Zenghui Yu (Huawei)" <zenghui.yu@linux.dev>

NR_DAMOS_ACTIONS, NR_DAMOS_QUOTA_GOAL_METRICS, and NR_DAMOS_WMARK_METRICS
are not referenced by any code.  Remove them.

They can be reintroduced if a real user comes up.

Signed-off-by: Zenghui Yu (Huawei) <zenghui.yu@linux.dev>
---
 include/linux/damon.h | 8 --------
 1 file changed, 8 deletions(-)

diff --git a/include/linux/damon.h b/include/linux/damon.h
index 836353c4ab9a..6258ef8be764 100644
--- a/include/linux/damon.h
+++ b/include/linux/damon.h
@@ -117,7 +117,6 @@ struct damon_target {
  * @DAMOS_MIGRATE_HOT:  Migrate the regions prioritizing warmer regions.
  * @DAMOS_MIGRATE_COLD:	Migrate the regions prioritizing colder regions.
  * @DAMOS_STAT:		Do nothing but count the stat.
- * @NR_DAMOS_ACTIONS:	Total number of DAMOS actions
  *
  * The support of each action is up to running &struct damon_operations.
  * Refer to 'Operation Action' section of Documentation/mm/damon/design.rst for
@@ -137,7 +136,6 @@ enum damos_action {
 	DAMOS_MIGRATE_HOT,
 	DAMOS_MIGRATE_COLD,
 	DAMOS_STAT,		/* Do nothing but only record the stat */
-	NR_DAMOS_ACTIONS,
 };
 
 /**
@@ -154,9 +152,6 @@ enum damos_action {
  * @DAMOS_QUOTA_NODE_ELIGIBLE_MEM_BP:	Scheme-eligible memory ratio of a
  *					node in basis points (0-10000).
  * @DAMOS_QUOTA_HUGEPAGE_MEM_BP:	Huge page to total used memory ratio.
- * @NR_DAMOS_QUOTA_GOAL_METRICS:	Number of DAMOS quota goal metrics.
- *
- * Metrics equal to larger than @NR_DAMOS_QUOTA_GOAL_METRICS are unsupported.
  */
 enum damos_quota_goal_metric {
 	DAMOS_QUOTA_USER_INPUT,
@@ -169,7 +164,6 @@ enum damos_quota_goal_metric {
 	DAMOS_QUOTA_INACTIVE_MEM_BP,
 	DAMOS_QUOTA_NODE_ELIGIBLE_MEM_BP,
 	DAMOS_QUOTA_HUGEPAGE_MEM_BP,
-	NR_DAMOS_QUOTA_GOAL_METRICS,
 };
 
 /**
@@ -313,12 +307,10 @@ struct damos_quota {
  *
  * @DAMOS_WMARK_NONE:		Ignore the watermarks of the given scheme.
  * @DAMOS_WMARK_FREE_MEM_RATE:	Free memory rate of the system in [0,1000].
- * @NR_DAMOS_WMARK_METRICS:	Total number of DAMOS watermark metrics
  */
 enum damos_wmark_metric {
 	DAMOS_WMARK_NONE,
 	DAMOS_WMARK_FREE_MEM_RATE,
-	NR_DAMOS_WMARK_METRICS,
 };
 
 /**
-- 
2.53.0

Re: [PATCH] mm/damon/api: remove unused NR_DAMOS_* enumerators

[SJ Park]

On Sun, 20 Sep 2026 09:20:28 +0800 Zenghui Yu <zenghui.yu@linux.dev> wrote:

> From: "Zenghui Yu (Huawei)" <zenghui.yu@linux.dev>
> 
> NR_DAMOS_ACTIONS, NR_DAMOS_QUOTA_GOAL_METRICS, and NR_DAMOS_WMARK_METRICS

More than 72 columns.

> are not referenced by any code.  Remove them.
> 
> They can be reintroduced if a real user comes up.
> 
> Signed-off-by: Zenghui Yu (Huawei) <zenghui.yu@linux.dev>

Other than the above too trivial thing,

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

This patch is applied to damon/next [1] tree with the fix of the trivial commit
message length issue.  If this patch is not added to mm.git in short term
(~1 week?) with the fix, I will ask mm.git maintainer (Andrew Morton) to pick
this.  So, no action from your side is needed for now.  If it seems I also
forgot doing that or you cannot wait for my action, please feel free to ping me
or Andrew.

[1] https://origin.kernel.org/doc/html/latest/mm/damon/maintainer-profile.html#scm-trees


Thanks,
SJ

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