linux-kernel - [PATCH 2/3] fs: Remove mount

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Message-ID: <20250723132156.225410-3-pfalcato@suse.de>
Date: Wed, 23 Jul 2025 14:21:55 +0100
From: Pedro Falcato <pfalcato@...e.de>
To: Alexander Viro <viro@...iv.linux.org.uk>,
	Christian Brauner <brauner@...nel.org>,
	Jonathan Corbet <corbet@....net>
Cc: Jan Kara <jack@...e.cz>,
	linux-fsdevel@...r.kernel.org,
	linux-doc@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	"Matthew Wilcox (Oracle)" <willy@...radead.org>,
	Pedro Falcato <pfalcato@...e.de>
Subject: [PATCH 2/3] fs: Remove mount_bdev

mount_bdev has no in-tree users ever since f2fs adopted the new mount
API. Remove it.

Signed-off-by: Pedro Falcato <pfalcato@...e.de>
---
 fs/super.c         | 43 -------------------------------------------
 include/linux/fs.h |  3 ---
 2 files changed, 46 deletions(-)

diff --git a/fs/super.c b/fs/super.c
index 7daa20737f2e..a038848e8d1f 100644
--- a/fs/super.c
+++ b/fs/super.c
@@ -1716,49 +1716,6 @@ int get_tree_bdev(struct fs_context *fc,
 }
 EXPORT_SYMBOL(get_tree_bdev);
 
-static int test_bdev_super(struct super_block *s, void *data)
-{
-	return !(s->s_iflags & SB_I_RETIRED) && s->s_dev == *(dev_t *)data;
-}
-
-struct dentry *mount_bdev(struct file_system_type *fs_type,
-	int flags, const char *dev_name, void *data,
-	int (*fill_super)(struct super_block *, void *, int))
-{
-	struct super_block *s;
-	int error;
-	dev_t dev;
-
-	error = lookup_bdev(dev_name, &dev);
-	if (error)
-		return ERR_PTR(error);
-
-	flags |= SB_NOSEC;
-	s = sget(fs_type, test_bdev_super, set_bdev_super, flags, &dev);
-	if (IS_ERR(s))
-		return ERR_CAST(s);
-
-	if (s->s_root) {
-		if ((flags ^ s->s_flags) & SB_RDONLY) {
-			deactivate_locked_super(s);
-			return ERR_PTR(-EBUSY);
-		}
-	} else {
-		error = setup_bdev_super(s, flags, NULL);
-		if (!error)
-			error = fill_super(s, data, flags & SB_SILENT ? 1 : 0);
-		if (error) {
-			deactivate_locked_super(s);
-			return ERR_PTR(error);
-		}
-
-		s->s_flags |= SB_ACTIVE;
-	}
-
-	return dget(s->s_root);
-}
-EXPORT_SYMBOL(mount_bdev);
-
 void kill_block_super(struct super_block *sb)
 {
 	struct block_device *bdev = sb->s_bdev;
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 65bb19e457d8..a09e25841026 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -2713,9 +2713,6 @@ static inline bool is_mgtime(const struct inode *inode)
 	return inode->i_opflags & IOP_MGTIME;
 }
 
-extern struct dentry *mount_bdev(struct file_system_type *fs_type,
-	int flags, const char *dev_name, void *data,
-	int (*fill_super)(struct super_block *, void *, int));
 extern struct dentry *mount_subtree(struct vfsmount *mnt, const char *path);
 void retire_super(struct super_block *sb);
 void generic_shutdown_super(struct super_block *sb);
-- 
2.50.1