From: SeongJae Park Date: Sat, 7 Mar 2026 19:49:13 +0000 (-0800) Subject: mm/damon/core: use time_before() for next_apply_sis X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=f05e253637837b603682173ed6bd0bc873dc0496;p=thirdparty%2Fkernel%2Flinux.git mm/damon/core: use time_before() for next_apply_sis damon_ctx->passed_sample_intervals and damos->next_apply_sis are unsigned long, and compared via normal comparison operators. It is unsafe from overflow. Use time_before(), which is safe from overflow when correctly used, instead. Link: https://lkml.kernel.org/r/20260307194915.203169-3-sj@kernel.org Signed-off-by: SeongJae Park Signed-off-by: Andrew Morton --- diff --git a/mm/damon/core.c b/mm/damon/core.c index c8c2e4660b986..ac06465cd9eb4 100644 --- a/mm/damon/core.c +++ b/mm/damon/core.c @@ -2097,7 +2097,7 @@ static void damon_do_apply_schemes(struct damon_ctx *c, damon_for_each_scheme(s, c) { struct damos_quota *quota = &s->quota; - if (c->passed_sample_intervals < s->next_apply_sis) + if (time_before(c->passed_sample_intervals, s->next_apply_sis)) continue; if (!s->wmarks.activated) @@ -2455,7 +2455,7 @@ static void kdamond_apply_schemes(struct damon_ctx *c) bool has_schemes_to_apply = false; damon_for_each_scheme(s, c) { - if (c->passed_sample_intervals < s->next_apply_sis) + if (time_before(c->passed_sample_intervals, s->next_apply_sis)) continue; if (!s->wmarks.activated) @@ -2479,7 +2479,7 @@ static void kdamond_apply_schemes(struct damon_ctx *c) } damon_for_each_scheme(s, c) { - if (c->passed_sample_intervals < s->next_apply_sis) + if (time_before(c->passed_sample_intervals, s->next_apply_sis)) continue; damos_walk_complete(c, s); damos_set_next_apply_sis(s, c);