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random: convert to ENTROPY_BITS for better code readability

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commit 12faac30d157970fdbfa171bbeb1fb88350303b1 upstream.

Signed-off-by: Yangtao Li <tiny.windzz@gmail.com>
Link: https://lore.kernel.org/r/20190607182517.28266-2-tiny.windzz@gmail.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Yangtao Li 2019-06-07 14:25:14 -04:00 • committed by Greg Kroah-Hartman
commit f3375cfe31
1 changed files with 2 additions and 3 deletions
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5
drivers/char/random.c
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@ -761,7 +761,7 @@ retry:
if (entropy_bits < 128)
return;
crng_reseed(&primary_crng, r);
entropy_bits = r->entropy_count >> ENTROPY_SHIFT;
entropy_bits = ENTROPY_BITS(r);
}
}
}
@ -1398,8 +1398,7 @@ retry:
goto retry;
trace_debit_entropy(r->name, 8 * ibytes);
if (ibytes &&
(r->entropy_count >> ENTROPY_SHIFT) < random_write_wakeup_bits) {
if (ibytes && ENTROPY_BITS(r) < random_write_wakeup_bits) {
wake_up_interruptible(&random_write_wait);
kill_fasync(&fasync, SIGIO, POLL_OUT);
}