linux-kernel - [PATCH v14 63/70] mm/swapfile: use vma iterator instead of vma linked list

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Message-ID: <20220906194824.2110408-64-Liam.Howlett@oracle.com>
Date:   Tue, 6 Sep 2022 19:49:04 +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>,
        Vlastimil Babka <vbabka@...e.cz>,
        Davidlohr Bueso <dave@...olabs.net>
Subject: [PATCH v14 63/70] mm/swapfile: use vma iterator instead of vma linked
 list

From: "Liam R. Howlett" <Liam.Howlett@...cle.com>

unuse_mm() no longer needs to reference the linked list.

Signed-off-by: Liam R. Howlett <Liam.Howlett@...cle.com>
Acked-by: Vlastimil Babka <vbabka@...e.cz>
Reviewed-by: Davidlohr Bueso <dave@...olabs.net>
---
 mm/swapfile.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/mm/swapfile.c b/mm/swapfile.c
index 263b19e693cf..469d9af86be2 100644
--- a/mm/swapfile.c
+++ b/mm/swapfile.c
@@ -1994,14 +1994,16 @@ static int unuse_mm(struct mm_struct *mm, unsigned int type)
 {
 	struct vm_area_struct *vma;
 	int ret = 0;
+	VMA_ITERATOR(vmi, mm, 0);
 
 	mmap_read_lock(mm);
-	for (vma = mm->mmap; vma; vma = vma->vm_next) {
+	for_each_vma(vmi, vma) {
 		if (vma->anon_vma) {
 			ret = unuse_vma(vma, type);
 			if (ret)
 				break;
 		}
+
 		cond_resched();
 	}
 	mmap_read_unlock(mm);
-- 
2.35.1