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    timekeeping: Add the new CLOCK_MONOTONIC_ACTIVE clock · 72199320
    Thomas Gleixner 提交于
    The planned change to unify the behaviour of the MONOTONIC and BOOTTIME
    clocks vs. suspend removes the ability to retrieve the active
    non-suspended time of a system.
    
    Provide a new CLOCK_MONOTONIC_ACTIVE clock which returns the active
    non-suspended time of the system via clock_gettime().
    
    This preserves the old behaviour of CLOCK_MONOTONIC before the
    BOOTTIME/MONOTONIC unification.
    
    This new clock also allows applications to detect programmatically that
    the MONOTONIC and BOOTTIME clocks are identical.
    Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
    Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>
    Cc: John Stultz <john.stultz@linaro.org>
    Cc: Jonathan Corbet <corbet@lwn.net>
    Cc: Kevin Easton <kevin@guarana.org>
    Cc: Linus Torvalds <torvalds@linux-foundation.org>
    Cc: Mark Salyzyn <salyzyn@android.com>
    Cc: Michael Kerrisk <mtk.manpages@gmail.com>
    Cc: Peter Zijlstra <peterz@infradead.org>
    Cc: Petr Mladek <pmladek@suse.com>
    Cc: Prarit Bhargava <prarit@redhat.com>
    Cc: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
    Cc: Steven Rostedt <rostedt@goodmis.org>
    Link: http://lkml.kernel.org/r/20180301165149.965235774@linutronix.deSigned-off-by: NIngo Molnar <mingo@kernel.org>
    72199320
posix-timers.c 35.8 KB