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| author | Thomas Gleixner <tglx@linutronix.de> | 2015-04-14 21:08:35 +0000 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2015-04-22 17:06:49 +0200 |
| commit | 21d6d52a1b7028e6a6840bd82e354aefa9a5e203 (patch) | |
| tree | 4eb0e548a84402f27655f0ae78d79eeff37cb26b /kernel/time/timekeeping.h | |
| parent | a6ffebce7f89f6f97cc22838a5d4383b15d6774f (diff) | |
| download | linux-21d6d52a1b7028e6a6840bd82e354aefa9a5e203.tar.gz | |
hrtimer: Get rid of softirq time
The softirq time field in the clock bases is an optimization from the
early days of hrtimers. It provides a coarse "jiffies" like time
mostly for self rearming timers.
But that comes with a price:
- Larger code size
- Extra storage space
- Duplicated functions with really small differences
The benefit of this is optimization is marginal for contemporary
systems.
Consolidate everything on the high resolution timer
implementation. This makes further optimizations possible.
Text size reduction:
x8664 -95, i386 -356, ARM -148, ARM64 -40, power64 -16
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Cc: Preeti U Murthy <preeti@linux.vnet.ibm.com>
Cc: Viresh Kumar <viresh.kumar@linaro.org>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Link: http://lkml.kernel.org/r/20150414203501.039977424@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'kernel/time/timekeeping.h')
| -rw-r--r-- | kernel/time/timekeeping.h | 3 |
1 files changed, 0 insertions, 3 deletions
diff --git a/kernel/time/timekeeping.h b/kernel/time/timekeeping.h index 5b57f6c9ae34d8..4d177fce37d52f 100644 --- a/kernel/time/timekeeping.h +++ b/kernel/time/timekeeping.h @@ -3,9 +3,6 @@ /* * Internal interfaces for kernel/time/ */ -extern ktime_t ktime_get_update_offsets_tick(ktime_t *offs_real, - ktime_t *offs_boot, - ktime_t *offs_tai); extern ktime_t ktime_get_update_offsets_now(ktime_t *offs_real, ktime_t *offs_boot, ktime_t *offs_tai); |