In kernel, we can use abs(a - b) to get the absolute value,
So there is no need to redefine a new one.
Signed-off-by: Xin Hao <xhao@xxxxxxxxxxxxxxxxx>
Reviewed-by: Muchun Song <songmuchun@xxxxxxxxxxxxx>
Reviewed-by: SeongJae Park <sj@xxxxxxxxxx>
---
mm/damon/core.c | 6 ++----
1 file changed, 2 insertions(+), 4 deletions(-)
diff --git a/mm/damon/core.c b/mm/damon/core.c
index f37c17b53814..4d2c3a0c7c8a 100644
--- a/mm/damon/core.c
+++ b/mm/damon/core.c
@@ -757,8 +757,6 @@ static void damon_merge_two_regions(struct damon_target *t,
damon_destroy_region(r, t);
}
-#define diff_of(a, b) (a > b ? a - b : b - a)
-
/*
* Merge adjacent regions having similar access frequencies
*
@@ -772,13 +770,13 @@ static void damon_merge_regions_of(struct damon_target *t, unsigned int thres,
struct damon_region *r, *prev = NULL, *next;
damon_for_each_region_safe(r, next, t) {
- if (diff_of(r->nr_accesses, r->last_nr_accesses) > thres)
+ if (abs(r->nr_accesses - r->last_nr_accesses) > thres)
r->age = 0;
else
r->age++;
if (prev && prev->ar.end == r->ar.start &&
- diff_of(prev->nr_accesses, r->nr_accesses) <= thres &&
+ abs(prev->nr_accesses - r->nr_accesses) <= thres &&
sz_damon_region(prev) + sz_damon_region(r) <= sz_limit)
damon_merge_two_regions(t, prev, r);
else
--
2.31.0
