How to read hw.clockrate from a kernel module?

[Maurizio Lombardi <m.lombardi85@xxxxxxxxx>]

Hi all,

I've a little question:
In platform/pc32/i386/identcpu.c there is the following variable defined:

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static int hw_clockrate;
SYSCTL_INT(_hw, OID_AUTO, clockrate, CTLFLAG_RD,
 &hw_clockrate, 0, "CPU instruction clock rate");
------------------

I suppose it contains the current cpu speed in Mhz.
How can I properly read it's content from a kernel module?
Is it correct to do that?

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const size_t var_size = sizeof(int);
int cpu_mhz;

kernel_sysctlbyname("hw.clockrate", &cpu_mhz, &var_size, NULL, 0, NULL);
--------------

Thanks for the help,

-- 
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Maurizio Lombardi