linux-kernel - [PATCH 07/14] samples/damon/wsse: use damon_call() repeat mode instead of damon

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Message-Id: <20250712195016.151108-8-sj@kernel.org>
Date: Sat, 12 Jul 2025 12:50:09 -0700
From: SeongJae Park <sj@...nel.org>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: SeongJae Park <sj@...nel.org>,
	damon@...ts.linux.dev,
	kernel-team@...a.com,
	linux-kernel@...r.kernel.org,
	linux-mm@...ck.org
Subject: [PATCH 07/14] samples/damon/wsse: use damon_call() repeat mode instead of damon_callback

wsse uses damon_callback for periodically reading DAMON internal data.
Use its alternative, damon_call() repeat mode.

Signed-off-by: SeongJae Park <sj@...nel.org>
---
 samples/damon/wsse.c | 16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)

diff --git a/samples/damon/wsse.c b/samples/damon/wsse.c
index d87b3b0801d2..a250e86b24a5 100644
--- a/samples/damon/wsse.c
+++ b/samples/damon/wsse.c
@@ -35,8 +35,9 @@ MODULE_PARM_DESC(enabled, "Enable or disable DAMON_SAMPLE_WSSE");
 static struct damon_ctx *ctx;
 static struct pid *target_pidp;
 
-static int damon_sample_wsse_after_aggregate(struct damon_ctx *c)
+static int damon_sample_wsse_repeat_call_fn(void *data)
 {
+	struct damon_ctx *c = data;
 	struct damon_target *t;
 
 	damon_for_each_target(t, c) {
@@ -52,9 +53,15 @@ static int damon_sample_wsse_after_aggregate(struct damon_ctx *c)
 	return 0;
 }
 
+static struct damon_call_control repeat_call_control = {
+	.fn = damon_sample_wsse_repeat_call_fn,
+	.repeat = true,
+};
+
 static int damon_sample_wsse_start(void)
 {
 	struct damon_target *target;
+	int err;
 
 	pr_info("start\n");
 
@@ -79,8 +86,11 @@ static int damon_sample_wsse_start(void)
 	}
 	target->pid = target_pidp;
 
-	ctx->callback.after_aggregation = damon_sample_wsse_after_aggregate;
-	return damon_start(&ctx, 1, true);
+	err = damon_start(&ctx, 1, true);
+	if (err)
+		return err;
+	repeat_call_control.data = ctx;
+	return damon_call(ctx, &repeat_call_control);
 }
 
 static void damon_sample_wsse_stop(void)
-- 
2.39.5