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    Subject[RFC 08/26] VFS: Export lives_below_in_same_fs()
    Export lives_below_in_same_fs() for use in union mount code.

    Signed-off-by: Jan Blunck <jblunck@suse.de>
    ---
    fs/namespace.c | 3 ++-
    include/linux/mount.h | 1 +
    2 files changed, 3 insertions(+), 1 deletion(-)

    --- a/fs/namespace.c
    +++ b/fs/namespace.c
    @@ -793,7 +793,7 @@ static bool permit_mount(struct nameidat
    return true;
    }

    -static int lives_below_in_same_fs(struct dentry *d, struct dentry *dentry)
    +int lives_below_in_same_fs(struct dentry *d, struct dentry *dentry)
    {
    while (1) {
    if (d == dentry)
    @@ -803,6 +803,7 @@ static int lives_below_in_same_fs(struct
    d = d->d_parent;
    }
    }
    +EXPORT_SYMBOL_GPL(lives_below_in_same_fs);

    struct vfsmount *copy_tree(struct vfsmount *mnt, struct dentry *dentry,
    int flag, uid_t owner)
    --- a/include/linux/mount.h
    +++ b/include/linux/mount.h
    @@ -106,6 +106,7 @@ extern void shrink_submounts(struct vfsm

    extern spinlock_t vfsmount_lock;
    extern dev_t name_to_dev_t(char *name);
    +extern int lives_below_in_same_fs(struct dentry *, struct dentry *);

    #endif
    #endif /* _LINUX_MOUNT_H */
    --

    -
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