I get the following section mismatch when building linux-next: WARNING: vmlinux.o(.text+0xc93f32): Section mismatch in reference from the function vcpu_hotplug() to the function .cpuinit.text:cpu_up() The function vcpu_hotplug() references the function __cpuinit cpu_up(). This is often because vcpu_hotplug lacks a __cpuinit annotation or the annotation of cpu_up is wrong. Is this a benign warning?