random: only wake up writers after zap if threshold was passed

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The only time that we need to wake up /dev/random writers on
RNDCLEARPOOL/RNDZAPPOOL is when we're changing from a value that is
greater than or equal to POOL_MIN_BITS to zero, because if we're
changing from below POOL_MIN_BITS to zero, the writers are already
unblocked.

Cc: Theodore Ts'o <tytso@mit.edu>
Reviewed-by: Dominik Brodowski <linux@dominikbrodowski.net>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>

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Jason A. Donenfeld 2022-02-22 14:01:57 +01:00

parent da3951ebdc

commit a3f9e8910e

1 changed files with 1 additions and 1 deletions

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drivers/char/random.c

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