Commit c25323c0 authored by Thomas Gleixner's avatar Thomas Gleixner
Browse files

x86/tsc: Use topology functions

It's simpler to look at the topology mask than iterating over all online cpus
to find a cpu on the same package.
Signed-off-by: default avatarThomas Gleixner <>
Cc: Peter Zijlstra <>
parent 81f70ba2
......@@ -1246,14 +1246,14 @@ void __init tsc_init(void)
unsigned long calibrate_delay_is_known(void)
int i, cpu = smp_processor_id();
int sibling, cpu = smp_processor_id();
if (!tsc_disabled && !cpu_has(&cpu_data(cpu), X86_FEATURE_CONSTANT_TSC))
return 0;
if (cpu_data(i).phys_proc_id == cpu_data(cpu).phys_proc_id)
return cpu_data(i).loops_per_jiffy;
sibling = cpumask_any_but(topology_core_cpumask(cpu), cpu);
if (sibling < nr_cpu_ids)
return cpu_data(sibling).loops_per_jiffy;
return 0;
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