[tip:timers/core] time: Explicitly use u32 instead of int for shift values
Commit-ID: fee84c43e6afc42295ae8058cbbef9ea5633926c
Gitweb: http://git.kernel.org/tip/fee84c43e6afc42295ae8058cbbef9ea5633926c
Author: John Stultz
AuthorDate: Fri, 13 Jul 2012 01:21:52 -0400
Committer: Thomas Gleixner
CommitDate: Sun, 15 Jul 2012 10:39:05 +0200
time: Explicitly use u32 instead of int for shift values
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
Reviewed-by: Ingo Molnar
Cc: Peter Zijlstra
Cc: Richard Cochran
Cc: Prarit Bhargava
Link:
http://lkml.kernel.org/r/1342156917-25092-4-git-send-email-john.stu...@linaro.org
Signed-off-by: Thomas Gleixner
---
kernel/time/timekeeping.c |6 +++---
1 files changed, 3 insertions(+), 3 deletions(-)
diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c
index c2f12aa..4fd83df 100644
--- a/kernel/time/timekeeping.c
+++ b/kernel/time/timekeeping.c
@@ -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;
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[tip:timers/core] time: Explicitly use u32 instead of int for shift values
Commit-ID: fee84c43e6afc42295ae8058cbbef9ea5633926c
Gitweb: http://git.kernel.org/tip/fee84c43e6afc42295ae8058cbbef9ea5633926c
Author: John Stultz john.stu...@linaro.org
AuthorDate: Fri, 13 Jul 2012 01:21:52 -0400
Committer: Thomas Gleixner t...@linutronix.de
CommitDate: Sun, 15 Jul 2012 10:39:05 +0200
time: Explicitly use u32 instead of int for shift values
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.stu...@linaro.org
Reviewed-by: Ingo Molnar mi...@kernel.org
Cc: Peter Zijlstra a.p.zijls...@chello.nl
Cc: Richard Cochran richardcoch...@gmail.com
Cc: Prarit Bhargava pra...@redhat.com
Link:
http://lkml.kernel.org/r/1342156917-25092-4-git-send-email-john.stu...@linaro.org
Signed-off-by: Thomas Gleixner t...@linutronix.de
---
kernel/time/timekeeping.c |6 +++---
1 files changed, 3 insertions(+), 3 deletions(-)
diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c
index c2f12aa..4fd83df 100644
--- a/kernel/time/timekeeping.c
+++ b/kernel/time/timekeeping.c
@@ -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;
--
To unsubscribe from this list: send the line unsubscribe linux-kernel in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
