[PATCH next 7/7] random32: Simplify prandom_seed_full_state()

[David Laight]

Instead of offsetting values that would be treated as zero, just set
a bit that ensures they wont be treated as zero.

Reduces the number of initial states from just under 2**113 to 2**109.
This really shouldn't matter.

Signed-off-by: David Laight <david.laight.linux@xxxxxxxxx>
---
 lib/random32.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/lib/random32.c b/lib/random32.c
index 1d6468045267..2c5c3519a0f8 100644
--- a/lib/random32.c
+++ b/lib/random32.c
@@ -118,13 +118,13 @@ void prandom_seed_full_state(struct rnd_state __percpu *pcpu_state)
 
 	for_each_possible_cpu(i) {
 		struct rnd_state *state = per_cpu_ptr(pcpu_state, i);
-		u32 seeds[4];
 
-		get_random_bytes(&seeds, sizeof(seeds));
-		state->s1 = __seed(seeds[0],   2U);
-		state->s2 = __seed(seeds[1],   8U);
-		state->s3 = __seed(seeds[2],  16U);
-		state->s4 = __seed(seeds[3], 128U);
+		get_random_bytes(state, sizeof(state));
+		/* The values must not be near zero. */
+		state->s1 |= 0x100;
+		state->s2 |= 0x100;
+		state->s3 |= 0x100;
+		state->s4 |= 0x100;
 
 		prandom_warmup(state);
 	}
-- 
2.39.5