Commit 86e9466a authored by Rafael J. Wysocki's avatar Rafael J. Wysocki
Browse files

intel_idle: Clean up irtl_2_usec() 



Move the irtl_ns_units[] definition into irtl_2_usec() which is the
only user of it, use div_u64() for the division in there (as the
divisor is small enough) and use the NSEC_PER_USEC symbol for the
divisor.  Also convert the irtl_2_usec() comment to a proper
kerneldo one.

No intentional functional impact.

Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent 1aefbd7a

drivers/idle/intel_idle.c

+10 −8
Original line number Diff line number Diff line
@@ -1292,16 +1292,17 @@ static void __init ivt_idle_state_table_update(void) 
	/* else, 1 and 2 socket systems use default ivt_cstates */

}



/*

 * Translate IRTL (Interrupt Response Time Limit) MSR to usec

/**

 * irtl_2_usec - IRTL to microseconds conversion.

 * @irtl: IRTL MSR value.

 *

 * Translate the IRTL (Interrupt Response Time Limit) MSR value to microseconds.

 */



static unsigned long long __init irtl_2_usec(unsigned long long irtl)

{

	static const unsigned int irtl_ns_units[] __initconst = {

		1, 32, 1024, 32768, 1048576, 33554432, 0, 0

	};



static unsigned long long __init irtl_2_usec(unsigned long long irtl)

{

	unsigned long long ns;



	if (!irtl)
@@ -1309,8 +1310,9 @@ static unsigned long long __init irtl_2_usec(unsigned long long irtl) 


	ns = irtl_ns_units[(irtl >> 10) & 0x7];



	return div64_u64((irtl & 0x3FF) * ns, 1000);

	return div_u64((irtl & 0x3FF) * ns, NSEC_PER_USEC);

}



/*

 * bxt_idle_state_table_update(void)

 *