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 <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
parent 81f70ba2

arch/x86/kernel/tsc.c

+4 −4
Original line number Diff line number Diff line
@@ -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