timers: Calculate now from jiffies during remote timer handling

We can directly calculate 'now' by reading jiffies. Replace the
call to get_jiffies_update() with a calculation. I have verified that
there is no difference in the value of 'now' as calculated by this
method.

This also helps us get rid of get_jiffies_update() and not require
to hold the seq lock since we are only reading jiffies directly.

Signed-off-by: Joel Fernandes (Google) <joel@joelfernandes.org>
3 files changed