[PATCH 4.14 040/237] random: convert to ENTROPY_BITS for better code readability

[Greg Kroah-Hartman]

From: Yangtao Li <tiny.windzz@xxxxxxxxx>

commit 12faac30d157970fdbfa171bbeb1fb88350303b1 upstream.

Signed-off-by: Yangtao Li <tiny.windzz@xxxxxxxxx>
Link: https://lore.kernel.org/r/20190607182517.28266-2-tiny.windzz@xxxxxxxxx
Signed-off-by: Theodore Ts'o <tytso@xxxxxxx>
Signed-off-by: Jason A. Donenfeld <Jason@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 drivers/char/random.c |    5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

--- a/drivers/char/random.c
+++ b/drivers/char/random.c
@@ -762,7 +762,7 @@ retry:
 			if (entropy_bits < 128)
 				return;
 			crng_reseed(&primary_crng, r);
-			entropy_bits = r->entropy_count >> ENTROPY_SHIFT;
+			entropy_bits = ENTROPY_BITS(r);
 		}
 	}
 }
@@ -1394,8 +1394,7 @@ 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);
 	}