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From:   Peng Zhang <zhangpeng362@huawei.com>
To:     <linux-mm@kvack.org>, <linux-kernel@vger.kernel.org>,
        <willy@infradead.org>
CC:     <hch@infradead.org>, <sidhartha.kumar@oracle.com>,
        <akpm@linux-foundation.org>, <wangkefeng.wang@huawei.com>,
        <sunnanyong@huawei.com>, ZhangPeng <zhangpeng362@huawei.com>
Subject: [PATCH v3 02/10] mm/page_io: remove unneeded SetPageError()
Date:   Thu, 20 Jul 2023 21:01:39 +0800
Message-ID: <20230720130147.4071649-3-zhangpeng362@huawei.com>
In-Reply-To: <20230720130147.4071649-1-zhangpeng362@huawei.com>
References: <20230720130147.4071649-1-zhangpeng362@huawei.com>
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From: ZhangPeng <zhangpeng362@huawei.com>

Nobody checks the PageError()/folio_test_error() for the page/folio in
__end_swap_bio_read/write() and sio_write_complete(). Therefore, we
don't need to set the error flag. Just drop it.

Suggested-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: ZhangPeng <zhangpeng362@huawei.com>
---
 mm/page_io.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/mm/page_io.c b/mm/page_io.c
index 3087a69a014b..5ddb5d9c5013 100644
--- a/mm/page_io.c
+++ b/mm/page_io.c
@@ -32,7 +32,6 @@ static void __end_swap_bio_write(struct bio *bio)
 	struct page *page = bio_first_page_all(bio);
 
 	if (bio->bi_status) {
-		SetPageError(page);
 		/*
 		 * We failed to write the page out to swap-space.
 		 * Re-dirty the page in order to avoid it being reclaimed.
@@ -61,7 +60,6 @@ static void __end_swap_bio_read(struct bio *bio)
 	struct page *page = bio_first_page_all(bio);
 
 	if (bio->bi_status) {
-		SetPageError(page);
 		pr_alert_ratelimited("Read-error on swap-device (%u:%u:%llu)\n",
 				     MAJOR(bio_dev(bio)), MINOR(bio_dev(bio)),
 				     (unsigned long long)bio->bi_iter.bi_sector);
@@ -415,7 +413,6 @@ static void sio_read_complete(struct kiocb *iocb, long ret)
 		for (p = 0; p < sio->pages; p++) {
 			struct page *page = sio->bvec[p].bv_page;
 
-			SetPageError(page);
 			unlock_page(page);
 		}
 		pr_alert_ratelimited("Read-error on swap-device\n");
-- 
2.25.1