[RFC PATCH 8/8] mm/damon/sysfs: remove region size validation

[SJ Park <sj@kernel.org>]

DAMON_SYSFS validates user inputs for monitoring target regions to
disallow negative size regions.  DAMON core assumes only positive size
regions, though.  The validation is incomplete.  Fortunately
damon_set_regions(), which is eventually used by DAMON_SYSFS, does the
complete validation.  Remove the incomplete and unnecessary validation.

Signed-off-by: SJ Park <sj@kernel.org>
---
 mm/damon/sysfs.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/mm/damon/sysfs.c b/mm/damon/sysfs.c
index e666dddf1feba..b65651498e0d1 100644
--- a/mm/damon/sysfs.c
+++ b/mm/damon/sysfs.c
@@ -1987,9 +1987,6 @@ static int damon_sysfs_set_regions(struct damon_target *t,
 		struct damon_sysfs_region *sys_region =
 			sysfs_regions->regions_arr[i];
 
-		if (sys_region->ar.start > sys_region->ar.end)
-			goto out;
-
 		ranges[i].start = sys_region->ar.start;
 		ranges[i].end = sys_region->ar.end;
 		if (i == 0)
-- 
2.47.3