random: introduce drain_entropy() helper to declutter crng_reseed()
commit 246c03dd upstream. In preparation for separating responsibilities, break out the entropy count management part of crng_reseed() into its own function. No functional changes. Cc: Theodore Ts'o <tytso@mit.edu> Reviewed-by: Dominik Brodowski <linux@dominikbrodowski.net> Reviewed-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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0971c1c2
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