diff --git a/mm/damon/core.c b/mm/damon/core.c
index 153425e416f5..fb52d99661bb 100644
--- a/mm/damon/core.c
+++ b/mm/damon/core.c
@@ -1935,8 +1935,6 @@ static int __damon_start(struct damon_ctx *ctx)
 	return err;
 }
 
-static int __damon_commit_ctx(struct damon_ctx *dst, struct damon_ctx *src);
-
 /**
  * damon_start() - Starts the monitorings for a given group of contexts.
  * @ctxs:	an array of the pointers for contexts to start monitoring