Determining the Instantaneous Time

Hello there,

I wish to determine at the MAC-level (i.e., in ieee80211_tx.c) exactly
at what point in time a given packet is queued up for transmission
with a precision of nanoseconds. In order to determine the
instantaneous time, what is the best tool available as I do not think
that I can use gettimeofday() at the kernel level as it requires
sys/time.h.

Please shed some light on this as early as you can.

Thanks in advance for taking your invaluable time to answer my question.

Cheers

Siva

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