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| author | Igor Opaniuk <igor.opaniuk@toradex.com> | 2020-11-17 14:38:38 +0200 |
|---|---|---|
| committer | Igor Opaniuk <igor.opaniuk@toradex.com> | 2020-11-17 14:38:38 +0200 |
| commit | 8bb9d758833ea1d0622277981b5225980ba0a42d (patch) | |
| tree | 2281499b2970e563f522db7ebc9d03bebfda4bfa /drivers/char/random.c | |
| parent | 0316046d152a1817bd0b4faff8e34c212a936a5e (diff) | |
| parent | 3b59d4725be760cd276094079b4fbe7bd44e1464 (diff) | |
Merge branch 'toradex_5.4-2.1.x-imx' into HEAD
Diffstat (limited to 'drivers/char/random.c')
| -rw-r--r-- | drivers/char/random.c | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/drivers/char/random.c b/drivers/char/random.c index 8ff28c14af7e..75a8f7f57269 100644 --- a/drivers/char/random.c +++ b/drivers/char/random.c @@ -1223,14 +1223,14 @@ static void add_timer_randomness(struct timer_rand_state *state, unsigned num) * We take into account the first, second and third-order deltas * in order to make our estimate. */ - delta = sample.jiffies - state->last_time; - state->last_time = sample.jiffies; + delta = sample.jiffies - READ_ONCE(state->last_time); + WRITE_ONCE(state->last_time, sample.jiffies); - delta2 = delta - state->last_delta; - state->last_delta = delta; + delta2 = delta - READ_ONCE(state->last_delta); + WRITE_ONCE(state->last_delta, delta); - delta3 = delta2 - state->last_delta2; - state->last_delta2 = delta2; + delta3 = delta2 - READ_ONCE(state->last_delta2); + WRITE_ONCE(state->last_delta2, delta2); if (delta < 0) delta = -delta; @@ -1330,6 +1330,7 @@ void add_interrupt_randomness(int irq, int irq_flags) fast_mix(fast_pool); add_interrupt_bench(cycles); + this_cpu_add(net_rand_state.s1, fast_pool->pool[cycles & 3]); if (unlikely(crng_init == 0)) { if ((fast_pool->count >= 64) && |