time: Add do_timens_ktime_to_host() helper

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The helper subtracts namespace's clock offset from the given time
and ensures that the result is within [0, KTIME_MAX].

Co-developed-by: Dmitry Safonov <dima@arista.com>
Signed-off-by: Andrei Vagin <avagin@gmail.com>
Signed-off-by: Dmitry Safonov <dima@arista.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20191112012724.250792-13-dima@arista.com

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Andrei Vagin 2019-11-12 01:27:01 +00:00 • committed by Thomas Gleixner

parent 5a590f35ad

commit 89dd8eecfe

2 changed files with 53 additions and 0 deletions

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17

include/linux/time_namespace.h

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36

kernel/time/namespace.c

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