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Commit 6d7fbce7 authored by Al Viro's avatar Al Viro
Browse files

kill kernfs_pin_sb() 



unused now and impossible to use safely anyway.

Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
parent 35ac1184

fs/kernfs/mount.c

+0 −30
Original line number Original line Diff line number Diff line
@@ -377,36 +377,6 @@ void kernfs_kill_sb(struct super_block *sb) 
	kfree(info);

	kfree(info);

}

}





/**

 * kernfs_pin_sb: try to pin the superblock associated with a kernfs_root

 * @kernfs_root: the kernfs_root in question

 * @ns: the namespace tag

 *

 * Pin the superblock so the superblock won't be destroyed in subsequent

 * operations.  This can be used to block ->kill_sb() which may be useful

 * for kernfs users which dynamically manage superblocks.

 *

 * Returns NULL if there's no superblock associated to this kernfs_root, or

 * -EINVAL if the superblock is being freed.

 */

struct super_block *kernfs_pin_sb(struct kernfs_root *root, const void *ns)

{

	struct kernfs_super_info *info;

	struct super_block *sb = NULL;



	mutex_lock(&kernfs_mutex);

	list_for_each_entry(info, &root->supers, node) {

		if (info->ns == ns) {

			sb = info->sb;

			if (!atomic_inc_not_zero(&info->sb->s_active))

				sb = ERR_PTR(-EINVAL);

			break;

		}

	}

	mutex_unlock(&kernfs_mutex);

	return sb;

}



void __init kernfs_init(void)

void __init kernfs_init(void)

{

{

include/linux/kernfs.h

+0 −1
Original line number Original line Diff line number Diff line
@@ -357,7 +357,6 @@ struct dentry *kernfs_mount_ns(struct file_system_type *fs_type, int flags, 
			       struct kernfs_root *root, unsigned long magic,

			       struct kernfs_root *root, unsigned long magic,

			       bool *new_sb_created, const void *ns);

			       bool *new_sb_created, const void *ns);

void kernfs_kill_sb(struct super_block *sb);

void kernfs_kill_sb(struct super_block *sb);

struct super_block *kernfs_pin_sb(struct kernfs_root *root, const void *ns);





void kernfs_init(void);

void kernfs_init(void);