I was looking to see why the arm kernel builds for fedora 17 were failing with: arch/arm/oprofile/../../../drivers/oprofile/oprofile_perf.c:28:28: error: variably modified 'perf_events' at file scope The error points to the following line in oprofile_perf.c: static struct perf_event **perf_events[nr_cpumask_bits]; The nr_cpumask_bits is defined in linux/include/linux/cpumask.h with the following snippet of code: #if NR_CPUS == 1 #define nr_cpu_ids 1 #else extern int nr_cpu_ids; #endif #ifdef CONFIG_CPUMASK_OFFSTACK /* Assuming NR_CPUS is huge, a runtime limit is more efficient. Also, * not all bits may be allocated. */ #define nr_cpumask_bits nr_cpu_ids #else #define nr_cpumask_bits NR_CPUS #endif The problem is that several arm machines have more than one processor (CONFIG_NR_CPUS>1), making nr_cpumask_bits be a variable rather than a compile time constant. Seems like the kernel should dynamically allocate space for perf_events[nr_cpumask_bits] because of the variable nature of nr_cpu_mask_bits. An example of a problem arm kernel build can be found at: http://arm.koji.fedoraproject.org/koji/buildinfo?buildID=56273 The log file with the error message can be found at: http://arm.koji.fedoraproject.org/koji/getfile?taskID=458300&name=build.log -Will _______________________________________________ arm mailing list arm@xxxxxxxxxxxxxxxxxxxxxxx https://admin.fedoraproject.org/mailman/listinfo/arm
