mirrors
/
linux-stable
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
1
0
Fork 0
Code Issues Releases Wiki Activity

mm/damon/core: use abs() instead of diff_of() 

In kernel, we can use abs(a - b) to get the absolute value, So there is no
need to redefine a new one.

Link: https://lkml.kernel.org/r/b24e7b82d9efa90daf150d62dea171e19390ad0b.1636989871.git.xhao@linux.alibaba.com
Signed-off-by: Xin Hao <xhao@linux.alibaba.com>
Reviewed-by: Muchun Song <songmuchun@bytedance.com>
Reviewed-by: SeongJae Park <sj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Xin Hao 2022-01-14 14:09:40 -08:00 committed by Linus Torvalds
parent c46b0bb6a7
commit d720bbbd70
1 changed files with 2 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
mm/damon/core.c
View File

@ -750,8 +750,6 @@ 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
*
@ -765,13 +763,13 @@ 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