random32: use msecs_to_jiffies for reseed timer
Use msecs_to_jiffies, for these calculations as different HZ considerations are taken into account for conversion of the timer shot, and also it makes the code more readable. Signed-off-by: Daniel Borkmann <dborkman@redhat.com> Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org> Signed-off-by: David S. Miller <davem@davemloft.net>hifive-unleashed-5.1
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66b251422b
commit
0125737acc
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@ -214,18 +214,22 @@ static DEFINE_TIMER(seed_timer, __prandom_timer, 0, 0);
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static void __prandom_timer(unsigned long dontcare)
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static void __prandom_timer(unsigned long dontcare)
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{
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{
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u32 entropy;
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u32 entropy;
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unsigned long expires;
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get_random_bytes(&entropy, sizeof(entropy));
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get_random_bytes(&entropy, sizeof(entropy));
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prandom_seed(entropy);
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prandom_seed(entropy);
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/* reseed every ~60 seconds, in [40 .. 80) interval with slack */
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/* reseed every ~60 seconds, in [40 .. 80) interval with slack */
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seed_timer.expires = jiffies + (40 * HZ + (prandom_u32() % (40 * HZ)));
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expires = 40 + (prandom_u32() % 40);
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seed_timer.expires = jiffies + msecs_to_jiffies(expires * MSEC_PER_SEC);
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add_timer(&seed_timer);
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add_timer(&seed_timer);
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}
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}
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static void __init __prandom_start_seed_timer(void)
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static void __init __prandom_start_seed_timer(void)
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{
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{
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set_timer_slack(&seed_timer, HZ);
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set_timer_slack(&seed_timer, HZ);
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seed_timer.expires = jiffies + 40 * HZ;
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seed_timer.expires = jiffies + msecs_to_jiffies(40 * MSEC_PER_SEC);
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add_timer(&seed_timer);
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add_timer(&seed_timer);
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}
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}
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