hangcheck-timer: Use ktime_get_ns()
There is no point in having a S390 private implementation and there is no point in using the raw monotonic time. The NTP freqeuency adjustment of CLOCK_MONOTONIC is really not doing any harm for the hang check timer. Use ktime_get_ns() for everything and get rid of the timespec conversions. V2: Drop the raw monotonic and the S390 special case Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: John Stultz <john.stultz@linaro.org>
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