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The cpu_info member of cpupower_topology was being declared as an unnamed structure. This member was then being malloced using the size of the parent cpupower_topology * the number of cpus. This works because cpu_info is smaller than cpupower_topology. However, there is no guarantee that will always be the case. Making cpu_info its own top level structure (named cpuid_core_info) allows for mallocing the actual size of this structure. This also lets us get rid of a redefinition of the structure in topology.c with slightly different field names. Signed-off-by: Palmer Cox <p@lmercox.com> Signed-off-by: Thomas Renninger <trenn@suse.de> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>