Avoid the READ_ONCE in commit
4a072c71f49b ("random: silence compiler
warnings and fix race") if we can leave the function after
arch_get_random_XXX().
Cc: Jason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
u64 get_random_u64(void)
{
u64 ret;
u64 get_random_u64(void)
{
u64 ret;
- bool use_lock = READ_ONCE(crng_init) < 2;
unsigned long flags = 0;
struct batched_entropy *batch;
static void *previous;
unsigned long flags = 0;
struct batched_entropy *batch;
static void *previous;
warn_unseeded_randomness(&previous);
warn_unseeded_randomness(&previous);
+ use_lock = READ_ONCE(crng_init) < 2;
batch = &get_cpu_var(batched_entropy_u64);
if (use_lock)
read_lock_irqsave(&batched_entropy_reset_lock, flags);
batch = &get_cpu_var(batched_entropy_u64);
if (use_lock)
read_lock_irqsave(&batched_entropy_reset_lock, flags);
u32 get_random_u32(void)
{
u32 ret;
u32 get_random_u32(void)
{
u32 ret;
- bool use_lock = READ_ONCE(crng_init) < 2;
unsigned long flags = 0;
struct batched_entropy *batch;
static void *previous;
unsigned long flags = 0;
struct batched_entropy *batch;
static void *previous;
warn_unseeded_randomness(&previous);
warn_unseeded_randomness(&previous);
+ use_lock = READ_ONCE(crng_init) < 2;
batch = &get_cpu_var(batched_entropy_u32);
if (use_lock)
read_lock_irqsave(&batched_entropy_reset_lock, flags);
batch = &get_cpu_var(batched_entropy_u32);
if (use_lock)
read_lock_irqsave(&batched_entropy_reset_lock, flags);