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Commit 9ce616aa authored by Ingo Molnar's avatar Ingo Molnar
Browse files

time: ntp: clean up ntp_update_frequency() 



Impact: cleanup, no functionality changed

Prepare a refactoring of ntp_update_frequency().

kernel/time/ntp.o:

   text	   data	    bss	    dec	    hex	filename
   2504	    114	    136	   2754	    ac2	ntp.o.before
   2504	    114	    136	   2754	    ac2	ntp.o.after

md5:
   41f3009debc9b397d7394dd77d912f0a  ntp.o.before.asm
   41f3009debc9b397d7394dd77d912f0a  ntp.o.after.asm

Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent bbd12676

kernel/time/ntp.c

+18 −9
Original line number Diff line number Diff line
@@ -77,11 +77,20 @@ static long ntp_tick_adj; 
 * NTP methods:

 */



/*

 * Update (tick_length, tick_length_base, tick_nsec), based

 * on (tick_usec, ntp_tick_adj, time_freq):

 */

static void ntp_update_frequency(void)

{

	u64 old_tick_length_base = tick_length_base;

	u64 second_length = (u64)(tick_usec * NSEC_PER_USEC * USER_HZ)

	u64 prev_base;

	u64 second_length;



	prev_base = tick_length_base;



	second_length		 = (u64)(tick_usec * NSEC_PER_USEC * USER_HZ)

						<< NTP_SCALE_SHIFT;



	second_length		+= (s64)ntp_tick_adj << NTP_SCALE_SHIFT;

	second_length		+= time_freq;
@@ -94,7 +103,7 @@ static void ntp_update_frequency(void) 
	 * Don't wait for the next second_overflow, apply

	 * the change to the tick length immediately

	 */

	tick_length += tick_length_base - old_tick_length_base;

	tick_length		+= tick_length_base - prev_base;

}



static void ntp_update_offset(long offset)