From: Song Liu <songliubraving@fb.com>
Date: Mon, 9 Nov 2015 22:32:12 +0000 (-0800)
Subject: make sure __rand_0_1 does not return 0.0
X-Git-Tag: fio-2.2.12~19
X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=592bf4581264dcb7959359a93bbddd46d12794ab;p=fio.git

make sure __rand_0_1 does not return 0.0

Signed-off-by: Jens Axboe <axboe@fb.com>
---

diff --git a/lib/rand.h b/lib/rand.h
index 3d78115d..a95bd28b 100644
--- a/lib/rand.h
+++ b/lib/rand.h
@@ -109,11 +109,11 @@ static inline double __rand_0_1(struct frand_state *state)
 	if (state->use64) {
 		uint64_t val = __rand64(&state->state64);
 
-		return (double) val / (FRAND64_MAX + 1.0);
+		return (val + 1.0) / (FRAND64_MAX + 1.0);
 	} else {
 		uint32_t val = __rand32(&state->state32);
 
-		return (double) val / (FRAND32_MAX + 1.0);
+		return (val + 1.0) / (FRAND32_MAX + 1.0);
 	}
 }