diff options
| -rw-r--r-- | include/linux/timekeeper_internal.h | 68 | ||||
| -rw-r--r-- | kernel/time/timekeeping.c | 56 |
2 files changed, 69 insertions, 55 deletions
diff --git a/include/linux/timekeeper_internal.h b/include/linux/timekeeper_internal.h new file mode 100644 index 000000000000..8ba43fa8c7e6 --- /dev/null +++ b/include/linux/timekeeper_internal.h | |||
| @@ -0,0 +1,68 @@ | |||
| 1 | /* | ||
| 2 | * You SHOULD NOT be including this unless you're vsyscall | ||
| 3 | * handling code or timekeeping internal code! | ||
| 4 | */ | ||
| 5 | |||
| 6 | #ifndef _LINUX_TIMEKEEPER_INTERNAL_H | ||
| 7 | #define _LINUX_TIMEKEEPER_INTERNAL_H | ||
| 8 | |||
| 9 | #include <linux/clocksource.h> | ||
| 10 | #include <linux/jiffies.h> | ||
| 11 | #include <linux/time.h> | ||
| 12 | |||
| 13 | /* Structure holding internal timekeeping values. */ | ||
| 14 | struct timekeeper { | ||
| 15 | /* Current clocksource used for timekeeping. */ | ||
| 16 | struct clocksource *clock; | ||
| 17 | /* NTP adjusted clock multiplier */ | ||
| 18 | u32 mult; | ||
| 19 | /* The shift value of the current clocksource. */ | ||
| 20 | u32 shift; | ||
| 21 | /* Number of clock cycles in one NTP interval. */ | ||
| 22 | cycle_t cycle_interval; | ||
| 23 | /* Number of clock shifted nano seconds in one NTP interval. */ | ||
| 24 | u64 xtime_interval; | ||
| 25 | /* shifted nano seconds left over when rounding cycle_interval */ | ||
| 26 | s64 xtime_remainder; | ||
| 27 | /* Raw nano seconds accumulated per NTP interval. */ | ||
| 28 | u32 raw_interval; | ||
| 29 | |||
| 30 | /* Current CLOCK_REALTIME time in seconds */ | ||
| 31 | u64 xtime_sec; | ||
| 32 | /* Clock shifted nano seconds */ | ||
| 33 | u64 xtime_nsec; | ||
| 34 | |||
| 35 | /* Difference between accumulated time and NTP time in ntp | ||
| 36 | * shifted nano seconds. */ | ||
| 37 | s64 ntp_error; | ||
| 38 | /* Shift conversion between clock shifted nano seconds and | ||
| 39 | * ntp shifted nano seconds. */ | ||
| 40 | u32 ntp_error_shift; | ||
| 41 | |||
| 42 | /* | ||
| 43 | * wall_to_monotonic is what we need to add to xtime (or xtime corrected | ||
| 44 | * for sub jiffie times) to get to monotonic time. Monotonic is pegged | ||
| 45 | * at zero at system boot time, so wall_to_monotonic will be negative, | ||
| 46 | * however, we will ALWAYS keep the tv_nsec part positive so we can use | ||
| 47 | * the usual normalization. | ||
| 48 | * | ||
| 49 | * wall_to_monotonic is moved after resume from suspend for the | ||
| 50 | * monotonic time not to jump. We need to add total_sleep_time to | ||
| 51 | * wall_to_monotonic to get the real boot based time offset. | ||
| 52 | * | ||
| 53 | * - wall_to_monotonic is no longer the boot time, getboottime must be | ||
| 54 | * used instead. | ||
| 55 | */ | ||
| 56 | struct timespec wall_to_monotonic; | ||
| 57 | /* Offset clock monotonic -> clock realtime */ | ||
| 58 | ktime_t offs_real; | ||
| 59 | /* time spent in suspend */ | ||
| 60 | struct timespec total_sleep_time; | ||
| 61 | /* Offset clock monotonic -> clock boottime */ | ||
| 62 | ktime_t offs_boot; | ||
| 63 | /* The raw monotonic time for the CLOCK_MONOTONIC_RAW posix clock. */ | ||
| 64 | struct timespec raw_time; | ||
| 65 | /* Seqlock for all timekeeper values */ | ||
| 66 | seqlock_t lock; | ||
| 67 | }; | ||
| 68 | #endif /* _LINUX_TIMEKEEPER_INTERNAL_H */ | ||
diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c index d3b91e75cecd..02c19d3d8e0d 100644 --- a/kernel/time/timekeeping.c +++ b/kernel/time/timekeeping.c | |||
| @@ -8,6 +8,7 @@ | |||
| 8 | * | 8 | * |
| 9 | */ | 9 | */ |
| 10 | 10 | ||
| 11 | #include <linux/timekeeper_internal.h> | ||
| 11 | #include <linux/module.h> | 12 | #include <linux/module.h> |
| 12 | #include <linux/interrupt.h> | 13 | #include <linux/interrupt.h> |
| 13 | #include <linux/percpu.h> | 14 | #include <linux/percpu.h> |
| @@ -21,61 +22,6 @@ | |||
| 21 | #include <linux/tick.h> | 22 | #include <linux/tick.h> |
| 22 | #include <linux/stop_machine.h> | 23 | #include <linux/stop_machine.h> |
| 23 | 24 | ||
| 24 | /* Structure holding internal timekeeping values. */ | ||
| 25 | struct timekeeper { | ||
| 26 | /* Current clocksource used for timekeeping. */ | ||
| 27 | struct clocksource *clock; | ||
| 28 | /* NTP adjusted clock multiplier */ | ||
| 29 | u32 mult; | ||
| 30 | /* The shift value of the current clocksource. */ | ||
| 31 | u32 shift; | ||
| 32 | /* Number of clock cycles in one NTP interval. */ | ||
| 33 | cycle_t cycle_interval; | ||
| 34 | /* Number of clock shifted nano seconds in one NTP interval. */ | ||
| 35 | u64 xtime_interval; | ||
| 36 | /* shifted nano seconds left over when rounding cycle_interval */ | ||
| 37 | s64 xtime_remainder; | ||
| 38 | /* Raw nano seconds accumulated per NTP interval. */ | ||
| 39 | u32 raw_interval; | ||
| 40 | |||
| 41 | /* Current CLOCK_REALTIME time in seconds */ | ||
| 42 | u64 xtime_sec; | ||
| 43 | /* Clock shifted nano seconds */ | ||
| 44 | u64 xtime_nsec; | ||
| 45 | |||
| 46 | /* Difference between accumulated time and NTP time in ntp | ||
| 47 | * shifted nano seconds. */ | ||
| 48 | s64 ntp_error; | ||
| 49 | /* Shift conversion between clock shifted nano seconds and | ||
| 50 | * ntp shifted nano seconds. */ | ||
| 51 | u32 ntp_error_shift; | ||
| 52 | |||
| 53 | /* | ||
| 54 | * wall_to_monotonic is what we need to add to xtime (or xtime corrected | ||
| 55 | * for sub jiffie times) to get to monotonic time. Monotonic is pegged | ||
| 56 | * at zero at system boot time, so wall_to_monotonic will be negative, | ||
| 57 | * however, we will ALWAYS keep the tv_nsec part positive so we can use | ||
| 58 | * the usual normalization. | ||
| 59 | * | ||
| 60 | * wall_to_monotonic is moved after resume from suspend for the | ||
| 61 | * monotonic time not to jump. We need to add total_sleep_time to | ||
| 62 | * wall_to_monotonic to get the real boot based time offset. | ||
| 63 | * | ||
| 64 | * - wall_to_monotonic is no longer the boot time, getboottime must be | ||
| 65 | * used instead. | ||
| 66 | */ | ||
| 67 | struct timespec wall_to_monotonic; | ||
| 68 | /* Offset clock monotonic -> clock realtime */ | ||
| 69 | ktime_t offs_real; | ||
| 70 | /* time spent in suspend */ | ||
| 71 | struct timespec total_sleep_time; | ||
| 72 | /* Offset clock monotonic -> clock boottime */ | ||
| 73 | ktime_t offs_boot; | ||
| 74 | /* The raw monotonic time for the CLOCK_MONOTONIC_RAW posix clock. */ | ||
| 75 | struct timespec raw_time; | ||
| 76 | /* Seqlock for all timekeeper values */ | ||
| 77 | seqlock_t lock; | ||
| 78 | }; | ||
| 79 | 25 | ||
| 80 | static struct timekeeper timekeeper; | 26 | static struct timekeeper timekeeper; |
| 81 | 27 | ||
