From c31ad3c6dad30d932cd906e384efd000db06233a Mon Sep 17 00:00:00 2001 From: SJ Park Date: Sun, 5 Jul 2026 08:55:58 -0700 Subject: [PATCH] mm/damon/core: remove start, end check in damon_set_region_system_rams() damon_set_region_system_rams() validates user inputs to avoid creating a negative size region. But DAMON core avoids zero size, too. The check is incomplete. The complete check is done inside damon_set_regions(), which is eventually called from damon_set_region_system_rams_default(). Drop the incomplete and unnecessary check. Link: https://lore.kernel.org/20260705155600.96555-8-sj@kernel.org Signed-off-by: SJ Park Signed-off-by: Andrew Morton --- mm/damon/core.c | 3 --- 1 file changed, 3 deletions(-) diff --git a/mm/damon/core.c b/mm/damon/core.c index ca301abcb9ec..3c5a46e1c079 100644 --- a/mm/damon/core.c +++ b/mm/damon/core.c @@ -3846,9 +3846,6 @@ int damon_set_region_system_rams_default(struct damon_target *t, { struct damon_addr_range addr_range; - if (*start > *end) - return -EINVAL; - if (!*start && !*end && !damon_find_system_rams_range(start, end, addr_unit)) return -EINVAL;