/*
* inet_ehash_secret must be set exactly once
- * Instead of using a dedicated spinlock, we (ab)use inetsw_lock
*/
void build_ehash_secret(void)
{
u32 rnd;
+
do {
get_random_bytes(&rnd, sizeof(rnd));
} while (rnd == 0);
- spin_lock_bh(&inetsw_lock);
- if (!inet_ehash_secret)
- inet_ehash_secret = rnd;
- spin_unlock_bh(&inetsw_lock);
+
+ cmpxchg(&inet_ehash_secret, 0, rnd);
}
EXPORT_SYMBOL(build_ehash_secret);