linux-kernel - [PATCH 05/15] md/raid10: use folio for tmppage

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Message-Id: <20251217120013.2616531-6-linan666@huaweicloud.com>
Date: Wed, 17 Dec 2025 20:00:03 +0800
From: linan666@...weicloud.com
To: song@...nel.org,
	yukuai@...as.com
Cc: linux-raid@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	xni@...hat.com,
	linan666@...weicloud.com,
	yangerkun@...wei.com,
	yi.zhang@...wei.com
Subject: [PATCH 05/15] md/raid10: use folio for tmppage

From: Li Nan <linan122@...wei.com>

Convert tmppage to tmpfolio and use it throughout in raid10.

Signed-off-by: Li Nan <linan122@...wei.com>
---
 drivers/md/raid10.h |  2 +-
 drivers/md/raid10.c | 37 +++++++++++++++++++------------------
 2 files changed, 20 insertions(+), 19 deletions(-)

diff --git a/drivers/md/raid10.h b/drivers/md/raid10.h
index ec79d87fb92f..19f37439a4e2 100644
--- a/drivers/md/raid10.h
+++ b/drivers/md/raid10.h
@@ -89,7 +89,7 @@ struct r10conf {
 
 	mempool_t		r10bio_pool;
 	mempool_t		r10buf_pool;
-	struct page		*tmppage;
+	struct folio		*tmpfolio;
 	struct bio_set		bio_split;
 
 	/* When taking over an array from a different personality, we store
diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c
index 1e57d9ce98e7..09238dc9cde6 100644
--- a/drivers/md/raid10.c
+++ b/drivers/md/raid10.c
@@ -2581,13 +2581,13 @@ static void recovery_request_write(struct mddev *mddev, struct r10bio *r10_bio)
 	}
 }
 
-static int r10_sync_page_io(struct md_rdev *rdev, sector_t sector,
-			    int sectors, struct page *page, enum req_op op)
+static int r10_sync_folio_io(struct md_rdev *rdev, sector_t sector,
+			    int sectors, struct folio *folio, enum req_op op)
 {
 	if (rdev_has_badblock(rdev, sector, sectors) &&
 	    (op == REQ_OP_READ || test_bit(WriteErrorSeen, &rdev->flags)))
 		return -1;
-	if (sync_page_io(rdev, sector, sectors << 9, page, op, false))
+	if (sync_folio_io(rdev, sector, sectors << 9, 0, folio, op, false))
 		/* success */
 		return 1;
 	if (op == REQ_OP_WRITE) {
@@ -2650,12 +2650,13 @@ static void fix_read_error(struct r10conf *conf, struct mddev *mddev, struct r10
 					      r10_bio->devs[sl].addr + sect,
 					      s) == 0) {
 				atomic_inc(&rdev->nr_pending);
-				success = sync_page_io(rdev,
-						       r10_bio->devs[sl].addr +
-						       sect,
-						       s<<9,
-						       conf->tmppage,
-						       REQ_OP_READ, false);
+				success = sync_folio_io(rdev,
+							r10_bio->devs[sl].addr +
+							sect,
+							s<<9,
+							0,
+							conf->tmpfolio,
+							REQ_OP_READ, false);
 				rdev_dec_pending(rdev, mddev);
 				if (success)
 					break;
@@ -2698,10 +2699,10 @@ static void fix_read_error(struct r10conf *conf, struct mddev *mddev, struct r10
 				continue;
 
 			atomic_inc(&rdev->nr_pending);
-			if (r10_sync_page_io(rdev,
-					     r10_bio->devs[sl].addr +
-					     sect,
-					     s, conf->tmppage, REQ_OP_WRITE)
+			if (r10_sync_folio_io(rdev,
+					      r10_bio->devs[sl].addr +
+					      sect,
+					      s, conf->tmpfolio, REQ_OP_WRITE)
 			    == 0) {
 				/* Well, this device is dead */
 				pr_notice("md/raid10:%s: read correction write failed (%d sectors at %llu on %pg)\n",
@@ -2730,10 +2731,10 @@ static void fix_read_error(struct r10conf *conf, struct mddev *mddev, struct r10
 				continue;
 
 			atomic_inc(&rdev->nr_pending);
-			switch (r10_sync_page_io(rdev,
+			switch (r10_sync_folio_io(rdev,
 					     r10_bio->devs[sl].addr +
 					     sect,
-					     s, conf->tmppage, REQ_OP_READ)) {
+					     s, conf->tmpfolio, REQ_OP_READ)) {
 			case 0:
 				/* Well, this device is dead */
 				pr_notice("md/raid10:%s: unable to read back corrected sectors (%d sectors at %llu on %pg)\n",
@@ -3841,7 +3842,7 @@ static void raid10_free_conf(struct r10conf *conf)
 	kfree(conf->mirrors);
 	kfree(conf->mirrors_old);
 	kfree(conf->mirrors_new);
-	safe_put_page(conf->tmppage);
+	folio_put(conf->tmpfolio);
 	bioset_exit(&conf->bio_split);
 	kfree(conf);
 }
@@ -3879,8 +3880,8 @@ static struct r10conf *setup_conf(struct mddev *mddev)
 	if (!conf->mirrors)
 		goto out;
 
-	conf->tmppage = alloc_page(GFP_KERNEL);
-	if (!conf->tmppage)
+	conf->tmpfolio = folio_alloc(GFP_KERNEL, 0);
+	if (!conf->tmpfolio)
 		goto out;
 
 	conf->geo = geo;
-- 
2.39.2