linux-kernel - [PATCH v13 67/70] mm/vmscan: Use vma iterator instead of vm

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Date:   Mon, 22 Aug 2022 15:06:33 +0000
From:   Liam Howlett <liam.howlett@...cle.com>
To:     "maple-tree@...ts.infradead.org" <maple-tree@...ts.infradead.org>,
        "linux-mm@...ck.org" <linux-mm@...ck.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Andrew Morton <akpm@...ux-foundation.org>
CC:     Liam Howlett <liam.howlett@...cle.com>, Yu Zhao <yuzhao@...gle.com>
Subject: [PATCH v13 67/70] mm/vmscan: Use vma iterator instead of vm_next

Use the vma iterator in in get_next_vma() instead of the linked list.

Suggested-by: Yu Zhao <yuzhao@...gle.com>
Signed-off-by: Liam R. Howlett <Liam.Howlett@...cle.com>
---
 mm/vmscan.c | 15 +++------------
 1 file changed, 3 insertions(+), 12 deletions(-)

diff --git a/mm/vmscan.c b/mm/vmscan.c
index f693720047db..9b292f07621e 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -3747,23 +3747,14 @@ static bool get_next_vma(unsigned long mask, unsigned long size, struct mm_walk
 {
 	unsigned long start = round_up(*vm_end, size);
 	unsigned long end = (start | ~mask) + 1;
+	VMA_ITERATOR(vmi, args->mm, start);
 
 	VM_WARN_ON_ONCE(mask & size);
 	VM_WARN_ON_ONCE((start & mask) != (*vm_start & mask));
 
-	while (args->vma) {
-		if (start >= args->vma->vm_end) {
-			args->vma = args->vma->vm_next;
+	for_each_vma_range(vmi, args->vma, end) {
+		if (should_skip_vma(args->vma->vm_start, args->vma->vm_end, args))
 			continue;
-		}
-
-		if (end && end <= args->vma->vm_start)
-			return false;
-
-		if (should_skip_vma(args->vma->vm_start, args->vma->vm_end, args)) {
-			args->vma = args->vma->vm_next;
-			continue;
-		}
 
 		*vm_start = max(start, args->vma->vm_start);
 		*vm_end = min(end - 1, args->vma->vm_end - 1) + 1;
-- 
2.35.1