diff options
| -rw-r--r-- | drivers/mtd/mtdchar.c | 2 | ||||
| -rw-r--r-- | fs/anon_inodes.c | 2 | ||||
| -rw-r--r-- | fs/hugetlbfs/inode.c | 1 | ||||
| -rw-r--r-- | fs/namespace.c | 21 | ||||
| -rw-r--r-- | fs/pipe.c | 2 | ||||
| -rw-r--r-- | include/linux/fs.h | 1 | ||||
| -rw-r--r-- | security/selinux/selinuxfs.c | 1 |
7 files changed, 26 insertions, 4 deletions
diff --git a/drivers/mtd/mtdchar.c b/drivers/mtd/mtdchar.c index 3f92731a5b9..f1af2228a1b 100644 --- a/drivers/mtd/mtdchar.c +++ b/drivers/mtd/mtdchar.c @@ -1192,7 +1192,7 @@ err_unregister_chdev: static void __exit cleanup_mtdchar(void) { unregister_mtd_user(&mtdchar_notifier); - mntput(mtd_inode_mnt); + kern_unmount(mtd_inode_mnt); unregister_filesystem(&mtd_inodefs_type); __unregister_chrdev(MTD_CHAR_MAJOR, 0, 1 << MINORBITS, "mtd"); } diff --git a/fs/anon_inodes.c b/fs/anon_inodes.c index c5567cb7843..4d433d34736 100644 --- a/fs/anon_inodes.c +++ b/fs/anon_inodes.c @@ -233,7 +233,7 @@ static int __init anon_inode_init(void) return 0; err_mntput: - mntput(anon_inode_mnt); + kern_unmount(anon_inode_mnt); err_unregister_filesystem: unregister_filesystem(&anon_inode_fs_type); err_exit: diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c index 7aafeb8fa30..0b686cec997 100644 --- a/fs/hugetlbfs/inode.c +++ b/fs/hugetlbfs/inode.c @@ -1030,6 +1030,7 @@ static int __init init_hugetlbfs_fs(void) static void __exit exit_hugetlbfs_fs(void) { kmem_cache_destroy(hugetlbfs_inode_cachep); + kern_unmount(hugetlbfs_vfsmount); unregister_filesystem(&hugetlbfs_fs_type); bdi_destroy(&hugetlbfs_backing_dev_info); } diff --git a/fs/namespace.c b/fs/namespace.c index cda50fe9250..22bfe8273c6 100644 --- a/fs/namespace.c +++ b/fs/namespace.c @@ -2721,6 +2721,25 @@ EXPORT_SYMBOL(put_mnt_ns); struct vfsmount *kern_mount_data(struct file_system_type *type, void *data) { - return vfs_kern_mount(type, MS_KERNMOUNT, type->name, data); + struct vfsmount *mnt; + mnt = vfs_kern_mount(type, MS_KERNMOUNT, type->name, data); + if (!IS_ERR(mnt)) { + /* + * it is a longterm mount, don't release mnt until + * we unmount before file sys is unregistered + */ + mnt_make_longterm(mnt); + } + return mnt; } EXPORT_SYMBOL_GPL(kern_mount_data); + +void kern_unmount(struct vfsmount *mnt) +{ + /* release long term mount so mount point can be released */ + if (!IS_ERR_OR_NULL(mnt)) { + mnt_make_shortterm(mnt); + mntput(mnt); + } +} +EXPORT_SYMBOL(kern_unmount); diff --git a/fs/pipe.c b/fs/pipe.c index da42f7db50d..1b7f9af67cc 100644 --- a/fs/pipe.c +++ b/fs/pipe.c @@ -1291,8 +1291,8 @@ static int __init init_pipe_fs(void) static void __exit exit_pipe_fs(void) { + kern_unmount(pipe_mnt); unregister_filesystem(&pipe_fs_type); - mntput(pipe_mnt); } fs_initcall(init_pipe_fs); diff --git a/include/linux/fs.h b/include/linux/fs.h index b224dc468a2..7a757a48a5c 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -1885,6 +1885,7 @@ extern int register_filesystem(struct file_system_type *); extern int unregister_filesystem(struct file_system_type *); extern struct vfsmount *kern_mount_data(struct file_system_type *, void *data); #define kern_mount(type) kern_mount_data(type, NULL) +extern void kern_unmount(struct vfsmount *mnt); extern int may_umount_tree(struct vfsmount *); extern int may_umount(struct vfsmount *); extern long do_mount(char *, char *, char *, unsigned long, void *); diff --git a/security/selinux/selinuxfs.c b/security/selinux/selinuxfs.c index 35459340019..de7900ef53d 100644 --- a/security/selinux/selinuxfs.c +++ b/security/selinux/selinuxfs.c @@ -1984,6 +1984,7 @@ __initcall(init_sel_fs); void exit_sel_fs(void) { kobject_put(selinuxfs_kobj); + kern_unmount(selinuxfs_mount); unregister_filesystem(&sel_fs_type); } #endif |