[PATCH 4/4] Docs/ABI/damon: document tried_regions probe hits

[Song Hu <husong@kylinos.cn>]

The 'tried_regions/<R>/probes/<P>/hits' file, added in commit
5b0de1bc3325 ("mm/damon/sysfs-schemes: implement probe/hits file"),
is described in usage.rst but missing from the canonical ABI document.

Document the 'probes/' directory and the 'probes/<P>/hits' file.

Signed-off-by: Song Hu <husong@kylinos.cn>
---
 Documentation/ABI/testing/sysfs-kernel-mm-damon | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/Documentation/ABI/testing/sysfs-kernel-mm-damon b/Documentation/ABI/testing/sysfs-kernel-mm-damon
index 7e8192527191..e8645f987fc3 100644
--- a/Documentation/ABI/testing/sysfs-kernel-mm-damon
+++ b/Documentation/ABI/testing/sysfs-kernel-mm-damon
@@ -644,3 +644,15 @@ Contact:	SJ Park <sj@kernel.org>
 Description:	Reading this file returns the size of the memory in the region
 		that passed DAMON operations layer-handled filters of the
 		scheme in bytes.
+
+What:		/sys/kernel/mm/damon/admin/kdamonds/<K>/contexts/<C>/schemes/<S>/tried_regions/<R>/probes/
+Date:		May 2026
+Contact:	SJ Park <sj@kernel.org>
+Description:	Directory for DAMON data-attribute monitoring probes of the
+		region.
+
+What:		/sys/kernel/mm/damon/admin/kdamonds/<K>/contexts/<C>/schemes/<S>/tried_regions/<R>/probes/<P>/hits
+Date:		May 2026
+Contact:	SJ Park <sj@kernel.org>
+Description:	Reading this file returns the number of data-attribute
+		monitoring probe-hit positive samples of the region.
-- 
2.43.0