user/sven/linux.git/include/linux/timekeeping.h, branch v4.0

time: Expose get_monotonic_boottime64 for in-kernel use

2015-01-24T01:21:55Z

As part of the 2038 conversion process, add a get_monotonic_boottime64 accessor so we can depracate get_monotonic_boottime. Cc: pang.xunlei Cc: Arnd Bergmann Cc: Thomas Gleixner Cc: Ingo Molnar Signed-off-by: John Stultz

time: Expose getboottime64 for in-kernel uses

2015-01-24T01:21:54Z

Adds a timespec64 based getboottime64() implementation that can be used as we convert internal users of getboottime away from using timespecs. Cc: pang.xunlei Cc: Arnd Bergmann Cc: Thomas Gleixner Cc: Ingo Molnar Signed-off-by: John Stultz

Merge branch 'timers-2038-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2014-12-10T18:13:28Z

Pull more 2038 timer work from Thomas Gleixner: "Two more patches for the ongoing 2038 work: - New accessors to clock MONOTONIC and REALTIME seconds This is a seperate branch as Arnd has follow up work depending on this" * 'timers-2038-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: timekeeping: Provide y2038 safe accessor to the seconds portion of CLOCK_REALTIME timekeeping: Provide fast accessor to the seconds part of CLOCK_MONOTONIC

time: Remove timekeeping_inject_sleeptime()

2014-11-21T20:00:01Z

Since all users have been converted to using the 64bit timekeeping_inject_sleeptime64(), remove the old y2038 problematic timekeeping_inject_sleeptime(). Signed-off-by: John Stultz

time: Expose get_monotonic_coarse64() for in-kernel uses

2014-11-21T19:59:59Z

Adds a timespec64 based get_monotonic_coarse64() implementation that can be used as we convert internal users of get_monotonic_coarse away from using timespecs. Signed-off-by: John Stultz

time: Expose getrawmonotonic64 for in-kernel uses

2014-11-21T19:59:58Z

Adds a timespec64 based getrawmonotonic64() implementation that can be used as we convert internal users of getrawmonotonic away from using timespecs. Signed-off-by: John Stultz

time: Provide y2038 safe timekeeping_inject_sleeptime() replacement

2014-11-21T19:59:57Z

As part of addressing "y2038 problem" for in-kernel uses, this patch adds timekeeping_inject_sleeptime64() using timespec64. After this patch, timekeeping_inject_sleeptime() is deprecated and all its call sites will be fixed using the new interface, after that it can be removed. NOTE: timekeeping_inject_sleeptime() is safe actually, but we want to eliminate timespec eventually, so comes this patch. Signed-off-by: pang.xunlei Signed-off-by: John Stultz

time: Provide y2038 safe do_settimeofday() replacement

2014-11-21T19:59:57Z

The kernel uses 32-bit signed value(time_t) for seconds elapsed 1970-01-01:00:00:00, thus it will overflow at 2038-01-19 03:14:08 on 32-bit systems. This is widely known as the y2038 problem. As part of addressing "y2038 problem" for in-kernel uses, this patch adds safe do_settimeofday64() using timespec64. After this patch, do_settimeofday() is deprecated and all its call sites will be fixed using do_settimeofday64(), after that it can be removed. Signed-off-by: pang.xunlei Signed-off-by: John Stultz

timekeeping: Provide y2038 safe accessor to the seconds portion of CLOCK_REALTIME

2014-10-29T14:15:40Z

ktime_get_real_seconds() is the replacement function for get_seconds() returning the seconds portion of CLOCK_REALTIME in a time64_t. For 64bit the function is equivivalent to get_seconds(), but for 32bit it protects the readout with the timekeeper sequence count. This is required because 32-bit machines cannot access 64-bit tk->xtime_sec variable atomically. [tglx: Massaged changelog and added docbook comment ] Signed-off-by: Heena Sirwani Reviewed-by: Arnd Bergman Cc: John Stultz Cc: opw-kernel@googlegroups.com Link: http://lkml.kernel.org/r/7adcfaa8962b8ad58785d9a2456c3f77d93c0ffb.1414578445.git.heenasirwani@gmail.com Signed-off-by: Thomas Gleixner

timekeeping: Provide fast accessor to the seconds part of CLOCK_MONOTONIC

2014-10-29T14:15:40Z

This is the counterpart to get_seconds() based on CLOCK_MONOTONIC. The use case for this interface are kernel internal coarse grained timestamps which do neither require the nanoseconds fraction of current time nor the CLOCK_REALTIME properties. Such timestamps can currently only retrieved by calling ktime_get_ts64() and using the tv_sec field of the returned timespec64. That's inefficient as it involves the read of the clocksource, math operations and must be protected by the timekeeper sequence counter. To avoid the sequence counter protection we restrict the return value to unsigned 32bit on 32bit machines. This covers ~136 years of uptime and therefor an overflow is not expected to hit anytime soon. To avoid math in the function we calculate the current seconds portion of CLOCK_MONOTONIC when the timekeeper gets updated in tk_update_ktime_data() similar to the CLOCK_REALTIME counterpart xtime_sec. [ tglx: Massaged changelog, simplified and commented the update function, added docbook comment ] Signed-off-by: Heena Sirwani Reviewed-by: Arnd Bergman Cc: John Stultz Cc: opw-kernel@googlegroups.com Link: http://lkml.kernel.org/r/da0b63f4bdf3478909f92becb35861197da3a905.1414578445.git.heenasirwani@gmail.com Signed-off-by: Thomas Gleixner