static DECLARE_WAIT_QUEUE_HEAD(crng_init_wait);
-#ifdef CONFIG_NUMA
/*
* Hack to deal with crazy userspace progams when they are all trying
* to access /dev/urandom in parallel. The programs are almost
* their brain damage.
*/
static struct crng_state **crng_node_pool __read_mostly;
-#endif
static void invalidate_batched_entropy(void);
static void numa_crng_init(void);
return arch_init;
}
-static void __maybe_unused crng_initialize_secondary(struct crng_state *crng)
+static void crng_initialize_secondary(struct crng_state *crng)
{
chacha_init_consts(crng->state);
_get_random_bytes(&crng->state[4], sizeof(__u32) * 12);
}
}
-#ifdef CONFIG_NUMA
static void do_numa_crng_init(struct work_struct *work)
{
int i;
static void numa_crng_init(void)
{
- schedule_work(&numa_crng_init_work);
+ if (IS_ENABLED(CONFIG_NUMA))
+ schedule_work(&numa_crng_init_work);
}
static struct crng_state *select_crng(void)
{
- struct crng_state **pool;
- int nid = numa_node_id();
-
- /* pairs with cmpxchg_release() in do_numa_crng_init() */
- pool = READ_ONCE(crng_node_pool);
- if (pool && pool[nid])
- return pool[nid];
+ if (IS_ENABLED(CONFIG_NUMA)) {
+ struct crng_state **pool;
+ int nid = numa_node_id();
- return &primary_crng;
-}
-#else
-static void numa_crng_init(void) {}
+ /* pairs with cmpxchg_release() in do_numa_crng_init() */
+ pool = READ_ONCE(crng_node_pool);
+ if (pool && pool[nid])
+ return pool[nid];
+ }
-static struct crng_state *select_crng(void)
-{
return &primary_crng;
}
-#endif
/*
* crng_fast_load() can be called by code in the interrupt service