FAILED: patch "[PATCH] samples/damon/prcl: avoid starting DAMON before" failed to apply to 6.16-stable tree

FAILED: patch "[PATCH] samples/damon/prcl: avoid starting DAMON before" failed to apply to 6.16-stable tree

[gregkh]

The patch below does not apply to the 6.16-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable@vger.kernel.org>.

To reproduce the conflict and resubmit, you may use the following commands:

git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.16.y
git checkout FETCH_HEAD
git cherry-pick -x e6b733ca2f99e968d696c2e812c8eb8e090bf37b
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<stable@vger.kernel.org>' --in-reply-to '2025092121-boned-marbles-55ea@gregkh' --subject-prefix 'PATCH 6.16.y' HEAD^..

Possible dependencies:



thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From e6b733ca2f99e968d696c2e812c8eb8e090bf37b Mon Sep 17 00:00:00 2001
From: SeongJae Park <sj@kernel.org>
Date: Mon, 8 Sep 2025 19:22:37 -0700
Subject: [PATCH] samples/damon/prcl: avoid starting DAMON before
 initialization

Commit 2780505ec2b4 ("samples/damon/prcl: fix boot time enable crash") is
somehow incompletely applying the origin patch [1].  It is missing the
part that avoids starting DAMON before module initialization.  Probably a
mistake during a merge has happened.  Fix it by applying the missed part
again.

Link: https://lkml.kernel.org/r/20250909022238.2989-3-sj@kernel.org
Link: https://lore.kernel.org/20250706193207.39810-3-sj@kernel.org [1]
Fixes: 2780505ec2b4 ("samples/damon/prcl: fix boot time enable crash")
Signed-off-by: SeongJae Park <sj@kernel.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/samples/damon/prcl.c b/samples/damon/prcl.c
index 1b839c06a612..0226652f94d5 100644
--- a/samples/damon/prcl.c
+++ b/samples/damon/prcl.c
@@ -137,6 +137,9 @@ static int damon_sample_prcl_enable_store(
 	if (enabled == is_enabled)
 		return 0;
 
+	if (!init_called)
+		return 0;
+
 	if (enabled) {
 		err = damon_sample_prcl_start();
 		if (err)