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| author | Thomas Gleixner <tglx@linutronix.de> | 2014-07-16 21:05:10 +0000 |
|---|---|---|
| committer | John Stultz <john.stultz@linaro.org> | 2014-07-23 15:01:51 -0700 |
| commit | 3a97837784acbf9fed699fc04d1799b0eb742fdf (patch) | |
| tree | 12297634077b24bcc6a01b779205043fc2a2a1f1 /kernel/time/timekeeping_internal.h | |
| parent | 6438e0ddc870f282f7ad46c050c211063a574687 (diff) | |
| download | linux-3a97837784acbf9fed699fc04d1799b0eb742fdf.tar.bz2 | |
clocksource: Make delta calculation a function
We want to move the TSC sanity check into core code to make NMI safe
accessors to clock monotonic[_raw] possible. For this we need to
sanity check the delta calculation. Create a helper function and
convert all sites to use it.
[ Build fix from jstultz ]
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: John Stultz <john.stultz@linaro.org>
Diffstat (limited to 'kernel/time/timekeeping_internal.h')
| -rw-r--r-- | kernel/time/timekeeping_internal.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/kernel/time/timekeeping_internal.h b/kernel/time/timekeeping_internal.h index e3d28ad236f9..05dfa6b25dc4 100644 --- a/kernel/time/timekeeping_internal.h +++ b/kernel/time/timekeeping_internal.h @@ -3,6 +3,7 @@ /* * timekeeping debug functions */ +#include <linux/clocksource.h> #include <linux/time.h> #ifdef CONFIG_DEBUG_FS @@ -11,4 +12,9 @@ extern void tk_debug_account_sleep_time(struct timespec64 *t); #define tk_debug_account_sleep_time(x) #endif +static inline cycle_t clocksource_delta(cycle_t now, cycle_t last, cycle_t mask) +{ + return (now - last) & mask; +} + #endif /* _TIMEKEEPING_INTERNAL_H */ |