+ mm-damon-core-remove-unused-damon_nr_running_ctxs.patch added to mm-new branch

+ mm-damon-core-remove-unused-damon_nr_running_ctxs.patch added to mm-new branch

[Andrew Morton]

The patch titled
     Subject: mm/damon/core: remove unused damon_nr_running_ctxs()
has been added to the -mm mm-new branch.  Its filename is
     mm-damon-core-remove-unused-damon_nr_running_ctxs.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-damon-core-remove-unused-damon_nr_running_ctxs.patch

This patch will later appear in the mm-new branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Note, mm-new is a provisional staging ground for work-in-progress
patches, and acceptance into mm-new is a notification for others take
notice and to finish up reviews.  Please do not hesitate to respond to
review feedback and post updated versions to replace or incrementally
fixup patches in mm-new.

The mm-new branch of mm.git is not included in linux-next

If a few days of testing in mm-new is successful, the patch will me moved
into mm.git's mm-unstable branch, which is included in linux-next

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*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***

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------------------------------------------------------
From: Cheng-Han Wu <hank20010209@gmail.com>
Subject: mm/damon/core: remove unused damon_nr_running_ctxs()
Date: Mon, 31 Aug 2026 07:57:22 -0700

damon_nr_running_ctxs() has had no in-tree users since commit 5ec4333b1967
("mm/damon: remove DAMON debugfs interface") removed all of its callers.

Remove the unused declaration and definition.

Link: https://lore.kernel.org/20260831145724.82387-3-sj@kernel.org
Signed-off-by: Cheng-Han Wu <hank20010209@gmail.com>
Signed-off-by: SJ Park <sj@kernel.org>
Reviewed-by: SJ Park <sj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 include/linux/damon.h |    1 -
 mm/damon/core.c       |   14 --------------
 2 files changed, 15 deletions(-)

--- a/include/linux/damon.h~mm-damon-core-remove-unused-damon_nr_running_ctxs
+++ a/include/linux/damon.h
@@ -1065,7 +1065,6 @@ int damon_set_attrs(struct damon_ctx *ct
 void damon_set_schemes(struct damon_ctx *ctx,
 			struct damos **schemes, ssize_t nr_schemes);
 int damon_commit_ctx(struct damon_ctx *old_ctx, struct damon_ctx *new_ctx);
-int damon_nr_running_ctxs(void);
 bool damon_is_registered_ops(enum damon_ops_id id);
 int damon_register_ops(struct damon_operations *ops);
 int damon_select_ops(struct damon_ctx *ctx, enum damon_ops_id id);
--- a/mm/damon/core.c~mm-damon-core-remove-unused-damon_nr_running_ctxs
+++ a/mm/damon/core.c
@@ -1847,20 +1847,6 @@ out:
 	return err;
 }
 
-/**
- * damon_nr_running_ctxs() - Return number of currently running contexts.
- */
-int damon_nr_running_ctxs(void)
-{
-	int nr_ctxs;
-
-	mutex_lock(&damon_lock);
-	nr_ctxs = nr_running_ctxs;
-	mutex_unlock(&damon_lock);
-
-	return nr_ctxs;
-}
-
 /* Returns the size upper limit for each monitoring region */
 static unsigned long damon_region_sz_limit(struct damon_ctx *ctx)
 {
_

Patches currently in -mm which might be from hank20010209@gmail.com are

mm-damon-core-remove-unused-damon_targets_empty.patch
mm-damon-core-remove-unused-damon_nr_running_ctxs.patch