eal: fix casts in random functions

GCC 8.1 warns:

In function 'rte_srand':
rte_random.h:34:10:
warning: conversion to 'long int' from 'long unsigned int'
may change the sign of the result [-Wsign-conversion]
  srand48((long unsigned int)seedval);

rte_random.h:51:8:
warning: conversion to 'uint64_t' {aka 'long unsigned int'}
from 'long int' may change the sign of the result
[-Wsign-conversion]
  val = lrand48();
        ^~~~~~~

rte_random.h:53:6:
warning: conversion to 'long unsigned int' from 'long int'
may change the sign of the result [-Wsign-conversion]
  val += lrand48();

Fixes: af75078fece3 ("first public release")
Cc: stable@dpdk.org
Signed-off-by: Andy Green <andy@warmcat.com>
Acked-by: Bruce Richardson <bruce.richardson@intel.com>

diff --git a/lib/librte_eal/common/include/rte_random.h b/lib/librte_eal/common/include/rte_random.h
index 63bb280..b2ca1c2 100644 (file)
--- a/lib/librte_eal/common/include/rte_random.h
+++ b/lib/librte_eal/common/include/rte_random.h
@@ -31,7 +31,7 @@ extern "C" {
 static inline void
 rte_srand(uint64_t seedval)
 {
-       srand48((long unsigned int)seedval);
+       srand48((long)seedval);
 }
 
 /**
@@ -48,9 +48,9 @@ static inline uint64_t
 rte_rand(void)
 {
        uint64_t val;
-       val = lrand48();
+       val = (uint64_t)lrand48();
        val <<= 32;
-       val += lrand48();
+       val += (uint64_t)lrand48();
        return val;
 }