korg/linux
0
0
Fork 0
mirror of https://mirrors.bfsu.edu.cn/git/linux.git synced 2024-12-11 13:04:03 +08:00
Code Issues Packages Projects Releases Wiki Activity

time: Explicitly use u32 instead of int for shift values

Browse Source 
Ingo noted that using a u32 instead of int for shift values
would be better to make sure the compiler doesn't unnecessarily
use complex signed arithmetic.

Signed-off-by: John Stultz <john.stultz@linaro.org>
Reviewed-by: Ingo Molnar <mingo@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Richard Cochran <richardcochran@gmail.com>
Cc: Prarit Bhargava <prarit@redhat.com>
Link: http://lkml.kernel.org/r/1342156917-25092-4-git-send-email-john.stultz@linaro.org
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
John Stultz 2012-07-13 01:21:52 -04:00 committed by Thomas Gleixner
parent 42e71e81f5
commit fee84c43e6
1 changed files with 3 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
kernel/time/timekeeping.c
View File

@ -28,7 +28,7 @@ struct timekeeper {
/* NTP adjusted clock multiplier */
u32 mult;
/* The shift value of the current clocksource. */
int shift;
u32 shift;
/* Number of clock cycles in one NTP interval. */
cycle_t cycle_interval;
/* Number of clock shifted nano seconds in one NTP interval. */
@ -45,7 +45,7 @@ struct timekeeper {
s64 ntp_error;
/* Shift conversion between clock shifted nano seconds and
* ntp shifted nano seconds. */
int ntp_error_shift;
u32 ntp_error_shift;
/* The current time */
struct timespec xtime;
@ -960,7 +960,7 @@ static void timekeeping_adjust(s64 offset)
*
* Returns the unconsumed cycles.
*/
static cycle_t logarithmic_accumulation(cycle_t offset, int shift)
static cycle_t logarithmic_accumulation(cycle_t offset, u32 shift)
{
u64 nsecps = (u64)NSEC_PER_SEC << timekeeper.shift;
u64 raw_nsecs;