Is this actually safe - suppose the machine has no tsc counter (eg old
x86 or indeed new x86 numa, speedstep using, etc). In that case
do_gettimeofday doesn't appear to be either IRQ safe or fast enough to
use in this way ?
This is how netif_rx() has worked for a long time. ATM is just
copying the input packet logic.
So why are you complaining now? :-)
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