[PATCH 08/11] Cleanup hrtimer.c's direct access to wall_to_monotonic

From: John Stultz
Date: Tue Jul 13 2010 - 20:58:21 EST


Provides an accessor function to replace hrtimer.c's
direct access of wall_to_monotonic.

This will allow wall_to_monotonic to be made static as
planned in Documentation/feature-removal-schedule.txt

Signed-off-by: John Stultz <johnstul@xxxxxxxxxx>
CC: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
---
include/linux/time.h | 3 ++-
kernel/hrtimer.c | 9 ++++-----
kernel/time/timekeeping.c | 5 +++++
3 files changed, 11 insertions(+), 6 deletions(-)

diff --git a/include/linux/time.h b/include/linux/time.h
index 36b42f5..3a9c0bf 100644
--- a/include/linux/time.h
+++ b/include/linux/time.h
@@ -126,7 +126,8 @@ extern int timekeeping_suspended;

unsigned long get_seconds(void);
struct timespec current_kernel_time(void);
-struct timespec __current_kernel_time(void); /* does not hold xtime_lock */
+struct timespec __current_kernel_time(void); /* does not take xtime_lock */
+struct timespec __get_wall_to_monotonic(void); /* does not take xtime_lock */
struct timespec get_monotonic_coarse(void);

#define CURRENT_TIME (current_kernel_time())
diff --git a/kernel/hrtimer.c b/kernel/hrtimer.c
index 5c69e99..809f48c 100644
--- a/kernel/hrtimer.c
+++ b/kernel/hrtimer.c
@@ -90,7 +90,7 @@ static void hrtimer_get_softirq_time(struct hrtimer_cpu_base *base)
do {
seq = read_seqbegin(&xtime_lock);
xts = __current_kernel_time();
- tom = wall_to_monotonic;
+ tom = __get_wall_to_monotonic();
} while (read_seqretry(&xtime_lock, seq));

xtim = timespec_to_ktime(xts);
@@ -612,7 +612,7 @@ static int hrtimer_reprogram(struct hrtimer *timer,
static void retrigger_next_event(void *arg)
{
struct hrtimer_cpu_base *base;
- struct timespec realtime_offset;
+ struct timespec realtime_offset, wtm;
unsigned long seq;

if (!hrtimer_hres_active())
@@ -620,10 +620,9 @@ static void retrigger_next_event(void *arg)

do {
seq = read_seqbegin(&xtime_lock);
- set_normalized_timespec(&realtime_offset,
- -wall_to_monotonic.tv_sec,
- -wall_to_monotonic.tv_nsec);
+ wtm = __get_wall_to_monotonic();
} while (read_seqretry(&xtime_lock, seq));
+ set_normalized_timespec(&realtime_offset, -wtm.tv_sec, -wtm.tv_nsec);

base = &__get_cpu_var(hrtimer_bases);

diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c
index b15c3ac..fb61c2e 100644
--- a/kernel/time/timekeeping.c
+++ b/kernel/time/timekeeping.c
@@ -858,6 +858,11 @@ struct timespec __current_kernel_time(void)
return xtime;
}

+struct timespec __get_wall_to_monotonic(void)
+{
+ return wall_to_monotonic;
+}
+
struct timespec current_kernel_time(void)
{
struct timespec now;
--
1.6.0.4

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