From c7986acba211e8285e14c9603fb89e6f4ea0b9f8 Mon Sep 17 00:00:00 2001 From: Ingo Molnar Date: Sun, 22 Feb 2009 13:29:09 +0100 Subject: [PATCH] time: ntp: micro-optimize ntp_update_offset() Impact: cleanup, no functionality changed The time_reftime update in ntp_update_offset() to xtime.tv_sec is a convoluted way of saying that we want to freeze the frequency and want the 'secs' delta to be 0. Also make this branch unlikely. This shaves off 8 bytes from the code size: text data bss dec hex filename 2504 114 136 2754 ac2 ntp.o.before 2496 114 136 2746 aba ntp.o.after Signed-off-by: Ingo Molnar --- kernel/time/ntp.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/kernel/time/ntp.c b/kernel/time/ntp.c index 5202dde2f0af..580a35028693 100644 --- a/kernel/time/ntp.c +++ b/kernel/time/ntp.c @@ -141,10 +141,10 @@ static void ntp_update_offset(long offset) * Select how the frequency is to be controlled * and in which mode (PLL or FLL). */ - if (time_status & STA_FREQHOLD || time_reftime == 0) - time_reftime = xtime.tv_sec; - secs = xtime.tv_sec - time_reftime; + if (unlikely(time_status & STA_FREQHOLD || time_reftime == 0)) + secs = 0; + time_reftime = xtime.tv_sec; offset64 = offset; -- 2.20.1