DAMON sysfs interface does parameters validation-purpose
damon_commit_ctx() calls for parameters update.  Now the same logic is
embedded inside damon_commit_ctx() itself.  Hence, the validation in
DAMON sysfs interface is just an unnecessary duplicate.  Remove it.

Signed-off-by: SJ Park <sj@kernel.org>
---
 mm/damon/sysfs.c | 32 +-------------------------------
 1 file changed, 1 insertion(+), 31 deletions(-)

diff --git a/mm/damon/sysfs.c b/mm/damon/sysfs.c
index 6710b6d019bf5..e666dddf1feba 100644
--- a/mm/damon/sysfs.c
+++ b/mm/damon/sysfs.c
@@ -2098,26 +2098,6 @@ static int damon_sysfs_apply_inputs(struct damon_ctx *ctx,
 static struct damon_ctx *damon_sysfs_build_ctx(
 		struct damon_sysfs_context *sys_ctx);
 
-/*
- * Return a new damon_ctx for testing new parameters to commit.
- */
-static struct damon_ctx *damon_sysfs_new_test_ctx(
-		struct damon_ctx *running_ctx)
-{
-	struct damon_ctx *test_ctx;
-	int err;
-
-	test_ctx = damon_new_ctx();
-	if (!test_ctx)
-		return NULL;
-	err = damon_commit_ctx(test_ctx, running_ctx);
-	if (err) {
-		damon_destroy_ctx(test_ctx);
-		return NULL;
-	}
-	return test_ctx;
-}
-
 /*
  * damon_sysfs_commit_input() - Commit user inputs to a running kdamond.
  * @kdamond:	The kobject wrapper for the associated kdamond.
@@ -2127,7 +2107,7 @@ static struct damon_ctx *damon_sysfs_new_test_ctx(
 static int damon_sysfs_commit_input(void *data)
 {
 	struct damon_sysfs_kdamond *kdamond = data;
-	struct damon_ctx *param_ctx, *test_ctx;
+	struct damon_ctx *param_ctx;
 	int err;
 
 	if (!damon_sysfs_kdamond_running(kdamond))
@@ -2139,17 +2119,7 @@ static int damon_sysfs_commit_input(void *data)
 	param_ctx = damon_sysfs_build_ctx(kdamond->contexts->contexts_arr[0]);
 	if (IS_ERR(param_ctx))
 		return PTR_ERR(param_ctx);
-	test_ctx = damon_sysfs_new_test_ctx(kdamond->damon_ctx);
-	if (!test_ctx) {
-		damon_destroy_ctx(param_ctx);
-		return -ENOMEM;
-	}
-	err = damon_commit_ctx(test_ctx, param_ctx);
-	if (err)
-		goto out;
 	err = damon_commit_ctx(kdamond->damon_ctx, param_ctx);
-out:
-	damon_destroy_ctx(test_ctx);
 	damon_destroy_ctx(param_ctx);
 	return err;
 }
-- 
2.47.3