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Since commitaefbab8e77("arm64: fpsimd: Preserve/restore kernel mode NEON at context switch"), kernel-mode NEON sections have been preemptible on arm64. And since commit7dadeaa6e8("sched: Further restrict the preemption modes"), voluntary preemption is no longer supported on arm64 either. Therefore, there's no longer any need to limit the length of kernel-mode NEON sections on arm64. Simplify the AES-CBC-MAC code accordingly. Reviewed-by: Ard Biesheuvel <ardb@kernel.org> Link: https://lore.kernel.org/r/20260401000548.133151-2-ebiggers@kernel.org Signed-off-by: Eric Biggers <ebiggers@kernel.org>