This build error is because the macro list_tail_rcu() is not yet present in the mainline kernel. This patch is dependent on the patch : https://lore.kernel.org/linux-kernel-mentees/CAF65HP2SC89k9HJZfcLgeOMRPBKRyasCMiLo2gZgBKycjHuU6A@xxxxxxxxxxxxxx/T/#t Thank you, Madhuparna
