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x86/tsc: Use topology functions

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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: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
This commit is contained in:
Thomas Gleixner 2016-02-18 20:53:43 +01:00
parent 81f70ba233
commit c25323c073
1 changed files with 4 additions and 4 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

8
arch/x86/kernel/tsc.c
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@ -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;
for_each_online_cpu(i)
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;
}
#endif