Received-SPF: pass (google.com: domain of linux-ext4-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
From:   Christoph Hellwig <hch@lst.de>
To:     Al Viro <viro@zeniv.linux.org.uk>,
        Christian Brauner <brauner@kernel.org>
Cc:     "Theodore Ts'o" <tytso@mit.edu>,
        Andreas Dilger <adilger.kernel@dilger.ca>,
        Mark Fasheh <mark@fasheh.com>,
        Joel Becker <jlbec@evilplan.org>,
        Joseph Qi <joseph.qi@linux.alibaba.com>,
        Jens Axboe <axboe@kernel.dk>, linux-fsdevel@vger.kernel.org,
        linux-ext4@vger.kernel.org, ocfs2-devel@lists.linux.dev,
        linux-block@vger.kernel.org
Subject: [PATCH 4/4] fs, block: remove bdev->bd_super
Date:   Mon,  7 Aug 2023 12:26:25 +0100
Message-Id: <20230807112625.652089-5-hch@lst.de>
In-Reply-To: <20230807112625.652089-1-hch@lst.de>
References: <20230807112625.652089-1-hch@lst.de>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Precedence: bulk

bdev->bd_super is unused now, remove it.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 fs/cramfs/inode.c         | 1 -
 fs/ext4/super.c           | 1 -
 fs/romfs/super.c          | 1 -
 fs/super.c                | 3 ---
 include/linux/blk_types.h | 1 -
 5 files changed, 7 deletions(-)

diff --git a/fs/cramfs/inode.c b/fs/cramfs/inode.c
index d2eea2e4807c4f..569f88dcb2f12c 100644
--- a/fs/cramfs/inode.c
+++ b/fs/cramfs/inode.c
@@ -493,7 +493,6 @@ static void cramfs_kill_sb(struct super_block *sb)
 		put_mtd_device(sb->s_mtd);
 		sb->s_mtd = NULL;
 	} else if (IS_ENABLED(CONFIG_CRAMFS_BLOCKDEV) && sb->s_bdev) {
-		sb->s_bdev->bd_super = NULL;
 		sync_blockdev(sb->s_bdev);
 		blkdev_put(sb->s_bdev, sb);
 	}
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 063832e2d12a8e..e6384782b4d036 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -5563,7 +5563,6 @@ static int __ext4_fill_super(struct fs_context *fc, struct super_block *sb)
 	spin_lock_init(&sbi->s_bdev_wb_lock);
 	errseq_check_and_advance(&sb->s_bdev->bd_inode->i_mapping->wb_err,
 				 &sbi->s_bdev_wb_err);
-	sb->s_bdev->bd_super = sb;
 	EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS;
 	ext4_orphan_cleanup(sb, es);
 	EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS;
diff --git a/fs/romfs/super.c b/fs/romfs/super.c
index b9eded546259bc..22cdb9a86a5748 100644
--- a/fs/romfs/super.c
+++ b/fs/romfs/super.c
@@ -593,7 +593,6 @@ static void romfs_kill_sb(struct super_block *sb)
 #endif
 #ifdef CONFIG_ROMFS_ON_BLOCK
 	if (sb->s_bdev) {
-		sb->s_bdev->bd_super = NULL;
 		sync_blockdev(sb->s_bdev);
 		blkdev_put(sb->s_bdev, sb);
 	}
diff --git a/fs/super.c b/fs/super.c
index efa28679e3e5b3..0023685815fda0 100644
--- a/fs/super.c
+++ b/fs/super.c
@@ -1369,7 +1369,6 @@ int get_tree_bdev(struct fs_context *fc,
 			return error;
 		}
 		s->s_flags |= SB_ACTIVE;
-		s->s_bdev->bd_super = s;
 	}
 
 	BUG_ON(fc->root);
@@ -1423,7 +1422,6 @@ struct dentry *mount_bdev(struct file_system_type *fs_type,
 		}
 
 		s->s_flags |= SB_ACTIVE;
-		s->s_bdev->bd_super = s;
 	}
 
 	return dget(s->s_root);
@@ -1436,7 +1434,6 @@ void kill_block_super(struct super_block *sb)
 
 	generic_shutdown_super(sb);
 	if (bdev) {
-		bdev->bd_super = NULL;
 		sync_blockdev(bdev);
 		blkdev_put(bdev, sb);
 	}
diff --git a/include/linux/blk_types.h b/include/linux/blk_types.h
index 0bad62cca3d025..d5c5e59ddbd25a 100644
--- a/include/linux/blk_types.h
+++ b/include/linux/blk_types.h
@@ -52,7 +52,6 @@ struct block_device {
 	atomic_t		bd_openers;
 	spinlock_t		bd_size_lock; /* for bd_inode->i_size updates */
 	struct inode *		bd_inode;	/* will die */
-	struct super_block *	bd_super;
 	void *			bd_claiming;
 	void *			bd_holder;
 	const struct blk_holder_ops *bd_holder_ops;
-- 
2.39.2