Pull mount updates from Christian Brauner:
- Make the legacy mount API notify pollers of propagation changes.
Changing propagation via change_mnt_propagation() or with
MOVE_MOUNT_SET_GROUP update the propagation relationship of the
target mount. But unlike mount_setattr() neither path touched the
affected mount namespace. So pollers of /proc/<pid>/mountinfo were
never woken.
- Also remove a redundant panic() in mnt_init()
* tag 'vfs-7.3-rc1.mount' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs:
mount: remove redundant panic() in mnt_init()
fs/namespace: notify pollers of legacy propagation changes