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| author | Russell King <rmk+kernel@arm.linux.org.uk> | 2009-09-21 19:03:13 +0400 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2009-09-21 19:03:13 +0400 |
| commit | 59b69e27ca9f6c6347b1ec07066a9250140cb9e8 (patch) | |
| tree | d8ea8948c92bdfc7f3bdfc03a7b789243ffbaaa8 /arch/arm/mach-u300/timer.c | |
| parent | 9c5e8fecc4a86adbf363f5cf344c0ccccdbb8982 (diff) | |
| parent | ee2b805c8eb6459cf541ef141ff70dae17af59ca (diff) | |
| download | linux-59b69e27ca9f6c6347b1ec07066a9250140cb9e8.tar.xz | |
Merge branch 'u300' into devel
Diffstat (limited to 'arch/arm/mach-u300/timer.c')
| -rw-r--r-- | arch/arm/mach-u300/timer.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/arch/arm/mach-u300/timer.c b/arch/arm/mach-u300/timer.c index cce53204880e..26d26f5100fe 100644 --- a/arch/arm/mach-u300/timer.c +++ b/arch/arm/mach-u300/timer.c @@ -346,6 +346,21 @@ static struct clocksource clocksource_u300_1mhz = { .flags = CLOCK_SOURCE_IS_CONTINUOUS, }; +/* + * Override the global weak sched_clock symbol with this + * local implementation which uses the clocksource to get some + * better resolution when scheduling the kernel. We accept that + * this wraps around for now, since it is just a relative time + * stamp. (Inspired by OMAP implementation.) + */ +unsigned long long notrace sched_clock(void) +{ + return clocksource_cyc2ns(clocksource_u300_1mhz.read( + &clocksource_u300_1mhz), + clocksource_u300_1mhz.mult, + clocksource_u300_1mhz.shift); +} + /* * This sets up the system timers, clock source and clock event. |