linux-kernel - [PATCH v3] mm/damon/vaddr: remove swap_ranges() and replace it with swap()

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Date:   Thu, 11 Nov 2021 03:53:54 -0800
From:   Yihao Han <hanyihao@...o.com>
To:     SeongJae Park <sj@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Cc:     kernel@...o.com, Yihao Han <hanyihao@...o.com>
Subject: [PATCH v3] mm/damon/vaddr: remove swap_ranges() and replace it with swap()

Remove 'swap_ranges()' and replace it with the macro 'swap()'
defined in 'include/linux/minmax.h' to simplify code and improve efficiency

Reviewed-by: SeongJae Park <sj@...nel.org>
Reviewed-by: Muchun Song <songmuchun@...edance.com>
Signed-off-by: Yihao Han <hanyihao@...o.com>
---
Change log:
v3:
- Fix the commit log.
v2:
- Remove the 'swap_ranges()' function and replace it with 'swap()'
rather than changing the 'swap_ranges()' itself.
---
 mm/damon/vaddr.c | 16 +++-------------
 1 file changed, 3 insertions(+), 13 deletions(-)

diff --git a/mm/damon/vaddr.c b/mm/damon/vaddr.c
index 35fe49080ee9..814dc811d7c4 100644
--- a/mm/damon/vaddr.c
+++ b/mm/damon/vaddr.c
@@ -97,16 +97,6 @@ static unsigned long sz_range(struct damon_addr_range *r)
 	return r->end - r->start;
 }
 
-static void swap_ranges(struct damon_addr_range *r1,
-			struct damon_addr_range *r2)
-{
-	struct damon_addr_range tmp;
-
-	tmp = *r1;
-	*r1 = *r2;
-	*r2 = tmp;
-}
-
 /*
  * Find three regions separated by two biggest unmapped regions
  *
@@ -145,9 +135,9 @@ static int __damon_va_three_regions(struct vm_area_struct *vma,
 		gap.start = last_vma->vm_end;
 		gap.end = vma->vm_start;
 		if (sz_range(&gap) > sz_range(&second_gap)) {
-			swap_ranges(&gap, &second_gap);
+			swap(gap, second_gap);
 			if (sz_range(&second_gap) > sz_range(&first_gap))
-				swap_ranges(&second_gap, &first_gap);
+				swap(second_gap, first_gap);
 		}
 next:
 		last_vma = vma;
@@ -158,7 +148,7 @@ static int __damon_va_three_regions(struct vm_area_struct *vma,
 
 	/* Sort the two biggest gaps by address */
 	if (first_gap.start > second_gap.start)
-		swap_ranges(&first_gap, &second_gap);
+		swap(first_gap, second_gap);
 
 	/* Store the result */
 	regions[0].start = ALIGN(start, DAMON_MIN_REGION);
-- 
2.17.1