linux-ext4 - [PATCH RFC 2/8] btrfs: use super write guard in btrfs_reclaim_bgs

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Message-Id: <20251104-work-guards-v1-2-5108ac78a171@kernel.org>
Date: Tue, 04 Nov 2025 13:12:31 +0100
From: Christian Brauner <brauner@...nel.org>
To: linux-fsdevel@...r.kernel.org
Cc: Alexander Viro <viro@...iv.linux.org.uk>, Jan Kara <jack@...e.cz>, 
 linux-btrfs@...r.kernel.org, linux-ext4@...r.kernel.org, 
 linux-xfs@...r.kernel.org, Christian Brauner <brauner@...nel.org>
Subject: [PATCH RFC 2/8] btrfs: use super write guard in
 btrfs_reclaim_bgs_work()

Signed-off-by: Christian Brauner <brauner@...nel.org>
---
 fs/btrfs/block-group.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/fs/btrfs/block-group.c b/fs/btrfs/block-group.c
index 5322ef2ae015..8284b9435758 100644
--- a/fs/btrfs/block-group.c
+++ b/fs/btrfs/block-group.c
@@ -1850,7 +1850,7 @@ void btrfs_reclaim_bgs_work(struct work_struct *work)
 	if (!btrfs_should_reclaim(fs_info))
 		return;
 
-	sb_start_write(fs_info->sb);
+	guard(super_write)(fs_info->sb);
 
 	if (!btrfs_exclop_start(fs_info, BTRFS_EXCLOP_BALANCE)) {
 		sb_end_write(fs_info->sb);
@@ -2030,7 +2030,6 @@ void btrfs_reclaim_bgs_work(struct work_struct *work)
 	list_splice_tail(&retry_list, &fs_info->reclaim_bgs);
 	spin_unlock(&fs_info->unused_bgs_lock);
 	btrfs_exclop_finish(fs_info);
-	sb_end_write(fs_info->sb);
 }
 
 void btrfs_reclaim_bgs(struct btrfs_fs_info *fs_info)

-- 
2.47.3