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At present kernfs_notify_list is implemented as a singly linked list of kernfs_node(s), where last element points to itself and value of ->attr.next tells if node is present on the list or not. Both addition and deletion to list happen under kernfs_notify_lock. Change kernfs_notify_list to llist so that addition to list can heppen locklessly. Suggested by: Al Viro <viro@zeniv.linux.org.uk> Acked-by: Tejun Heo <tj@kernel.org> Signed-off-by: Imran Khan <imran.f.khan@oracle.com> Link: https://lore.kernel.org/r/20220615021059.862643-3-imran.f.khan@oracle.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>