From: SeongJae Park <sj@kernel.org>
Date: Thu, 15 Jan 2026 15:20:43 +0000 (-0800)
Subject: mm/damon/lru_sort: use damon_kdamond_pid()
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=306550f0a5817d271361aa010fd245a4b43af725;p=thirdparty%2Fkernel%2Flinux.git

mm/damon/lru_sort: use damon_kdamond_pid()

DAMON_LRU_SORT 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.

Link: https://lkml.kernel.org/r/20260115152047.68415-4-sj@kernel.org
Signed-off-by: SeongJae Park <sj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

diff --git a/mm/damon/lru_sort.c b/mm/damon/lru_sort.c
index 8296f984b4280..bedb9134d2861 100644
--- a/mm/damon/lru_sort.c
+++ b/mm/damon/lru_sort.c
@@ -405,7 +405,9 @@ static int damon_lru_sort_turn(bool on)
 	err = damon_start(&ctx, 1, true);
 	if (err)
 		return err;
-	kdamond_pid = ctx->kdamond->pid;
+	kdamond_pid = damon_kdamond_pid(ctx);
+	if (kdamond_pid < 0)
+		return kdamond_pid;
 	return damon_call(ctx, &call_control);
 }