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As Nish suggested, it makes more sense to init the numa node informatiion for present cpus at boottime, which could also avoid WARN_ON(1) in numa_setup_cpu(). With this change, we also need to change the smp_prepare_cpus() to set up numa information only on present cpus. For those possible, but not present cpus, their numa information will be set up after they are started, as the original code did before commit 2fabf084b6ad. Cc: Nishanth Aravamudan <nacc@linux.vnet.ibm.com> Cc: Nathan Fontenot <nfont@linux.vnet.ibm.com> Signed-off-by: Li Zhong <zhong@linux.vnet.ibm.com> Acked-by: Nishanth Aravamudan <nacc@linux.vnet.ibm.com> Tested-by: Cyril Bur <cyril.bur@au1.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>