stable inclusion
from stable-v5.10.134
commit bf2f3d1970c03f14c84515738de5c0cb28c8ebce
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I5ZVR7

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=bf2f3d1970c03f14c84515738de5c0cb28c8ebce

--------------------------------

commit bcfe2f1a upstream.

Move rollback_registered_many() and add a temporary
forward declaration to make merging the code into
unregister_netdevice_many() easier to review.

No functional changes.
Reviewed-by: NEdwin Peer <edwin.peer@broadcom.com>
Signed-off-by: NJakub Kicinski <kuba@kernel.org>
Signed-off-by: NFedor Pchelkin <pchelkin@ispras.ru>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>

 Conflicts:
	net/core/dev.c
[zzk: commit ("net/ns: put workqueue of cleanup_net sleep for a while when notify")
adds cond_resched() into function which is being moved]
Reviewed-by: NWei Li <liwei391@huawei.com>