mm-damon-sysfs-use-damon_kdamond_pid.patch removed from -mm tree

The quilt patch titled
Subject: mm/damon/sysfs: use damon_kdamond_pid()
has been removed from the -mm tree. Its filename was
mm-damon-sysfs-use-damon_kdamond_pid.patch

This patch was dropped because it was merged into the mm-stable branch of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

------------------------------------------------------
From: SeongJae Park <[email protected]>
Subject: mm/damon/sysfs: use damon_kdamond_pid()
Date: Thu, 15 Jan 2026 07:20:42 -0800

DAMON sysfs interface directly uses damon_ctx->kdamond field with manual synchronization using damon_ctx->kdamond_lock, to get the pid of the kdamond. Use a new dedicated function for the purpose, namely damon_kdamond_pid(), since that doesn't require manual and error-prone synchronization.

Avoid use of kdamond_lock outside of the core.

---

 mm/damon/sysfs.c |    7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

@@ -1819,10 +1819,9 @@ static ssize_t pid_show(struct kobject *
 	if (!ctx)
 		goto out;
 
-	mutex_lock(&ctx->kdamond_lock);
-	if (ctx->kdamond)
-		pid = ctx->kdamond->pid;
-	mutex_unlock(&ctx->kdamond_lock);
+	pid = damon_kdamond_pid(ctx);
+	if (pid < 0)
+		pid = -1;
 out:
 	mutex_unlock(&damon_sysfs_lock);
 	return sysfs_emit(buf, "%d\n", pid);

_

Patches currently in -mm which might be from [email protected] are

selftests-damon-sysfs_memcg_path_leaksh-use-kmemleak.patch selftests-damon-wss_estimation-test-for-up-to-160-mib-working-set-size.patch selftests-damon-access_memory-add-repeat-mode.patch selftests-damon-wss_estimation-ensure-number-of-collected-wss.patch selftests-damon-wss_estimation-deduplicate-failed-samples-output.patch mm-damon-remove-damon_operations-cleanup.patch mm-damon-core-cleanup-targets-and-regions-at-once-on-kdamond-termination.patch mm-damon-core-cancel-damos_walk-before-damon_ctx-kdamond-reset.patch mm-damon-core-process-damon_call_control-requests-on-a-local-list.patch mm-damon-document-damon_call_control-dealloc_on_cancel-repeat-behavior.patch mm-damon-core-rename-damos_filter_out-to-damos_core_filter_out.patch mm-damon-rename-damon_min_region-to-damon_min_region_sz.patch mm-damon-rename-min_sz_region-of-damon_ctx-to-min_region_sz.patch docs-mm-damon-index-simplify-the-intro.patch docs-mm-damon-design-link-repology-instead-of-fedora-package.patch docs-mm-damon-design-document-damon-sample-modules.patch docs-mm-damon-design-add-reference-to-damon_stat-usage.patch docs-admin-guide-mm-damon-usage-introduce-damon-modules-at-the-beginning.patch docs-admin-guide-mm-damon-usage-update-stats-update-process-for-refresh_ms.patch docs-mm-damon-maintainer-profile-fix-wrong-maitnainers-section-name.patch docs-mm-damon-maintainer-profile-remove-damon-tests-perf-suggestion.patch maple_tree-start-using-maple-copy-node-for-destination-fix.patch