The function pointer field was added to be used as a place to do some
initialization works just before DAMON starts working. However, nobody
is using it now. Remove it.
Signed-off-by: SeongJae Park <sj@xxxxxxxxxx>
---
include/linux/damon.h | 7 ++-----
mm/damon/core.c | 2 --
2 files changed, 2 insertions(+), 7 deletions(-)
diff --git a/include/linux/damon.h b/include/linux/damon.h
index dab4bb0fe39d..043de2408c65 100644
--- a/include/linux/damon.h
+++ b/include/linux/damon.h
@@ -603,16 +603,14 @@ struct damon_operations {
/**
* struct damon_callback - Monitoring events notification callbacks.
*
- * @before_start: Called before starting the monitoring.
* @after_wmarks_check: Called after each schemes' watermarks check.
* @after_sampling: Called after each sampling.
* @after_aggregation: Called after each aggregation.
* @before_damos_apply: Called before applying DAMOS action.
* @before_terminate: Called before terminating the monitoring.
*
- * The monitoring thread (&damon_ctx.kdamond) calls @before_start and
- * @before_terminate just before starting and finishing the monitoring,
- * respectively.
+ * The monitoring thread (&damon_ctx.kdamond) calls @before_terminate just
+ * before finishing the monitoring.
*
* The monitoring thread calls @after_wmarks_check after each DAMON-based
* operation schemes' watermarks check. If users need to make changes to the
@@ -628,7 +626,6 @@ struct damon_operations {
* If any callback returns non-zero, monitoring stops.
*/
struct damon_callback {
- int (*before_start)(struct damon_ctx *context);
int (*after_wmarks_check)(struct damon_ctx *context);
int (*after_sampling)(struct damon_ctx *context);
int (*after_aggregation)(struct damon_ctx *context);
diff --git a/mm/damon/core.c b/mm/damon/core.c
index de30b788e13a..8904b3c079e6 100644
--- a/mm/damon/core.c
+++ b/mm/damon/core.c
@@ -2407,8 +2407,6 @@ static int kdamond_fn(void *data)
if (ctx->ops.init)
ctx->ops.init(ctx);
- if (ctx->callback.before_start && ctx->callback.before_start(ctx))
- goto done;
ctx->regions_score_histogram = kmalloc_array(DAMOS_MAX_SCORE + 1,
sizeof(*ctx->regions_score_histogram), GFP_KERNEL);
if (!ctx->regions_score_histogram)
--
2.39.5
