[RFC PATCH v2 06/28] mm/damon/core: introduce damon_ops->apply_probes

[SeongJae Park <sj@kernel.org>]

Extend damon_operations struct with a new callback, namely apply_probe.
The callback will be invoked for data attributes monitoring.  More
specifically, the callback will apply damon_probe objects to each region
and update the per-region per-probe counters for the number of
encountered probe-positive samples.

Signed-off-by: SeongJae Park <sj@kernel.org>
---
 include/linux/damon.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/include/linux/damon.h b/include/linux/damon.h
index 19b780bfab051..e9ca40cdd9102 100644
--- a/include/linux/damon.h
+++ b/include/linux/damon.h
@@ -630,6 +630,7 @@ enum damon_ops_id {
  * @update:			Update operations-related data structures.
  * @prepare_access_checks:	Prepare next access check of target regions.
  * @check_accesses:		Check the accesses to target regions.
+ * @apply_probes:		Apply probes for each region.
  * @get_scheme_score:		Get the score of a region for a scheme.
  * @apply_scheme:		Apply a DAMON-based operation scheme.
  * @target_valid:		Determine if the target is valid.
@@ -673,6 +674,7 @@ struct damon_operations {
 	void (*update)(struct damon_ctx *context);
 	void (*prepare_access_checks)(struct damon_ctx *context);
 	unsigned int (*check_accesses)(struct damon_ctx *context);
+	void (*apply_probes)(struct damon_ctx *context);
 	int (*get_scheme_score)(struct damon_ctx *context,
 			struct damon_region *r, struct damos *scheme);
 	unsigned long (*apply_scheme)(struct damon_ctx *context,
-- 
2.47.3