tree 4d33e8e3bb0d9c487bc337e2b9c44387bc847a71
parent ae9ecd92ddabc250817baa7eb401df3cfbd4c2da
author Theodore Ts'o <tytso@mit.edu> 1383514853 -0500
committer Theodore Ts'o <tytso@mit.edu> 1383520805 -0500

random: initialize the last_time field in struct timer_rand_state

Since we initialize jiffies to wrap five minutes before boot (see
INITIAL_JIFFIES defined in include/linux/jiffies.h) it's important to
make sure the last_time field is initialized to INITIAL_JIFFIES.
Otherwise, the entropy estimator will overestimate the amount of
entropy resulting from the first call to add_timer_randomness(),
generally by about 8 bits.

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>