random: Wake up all getrandom(2) callers when pool is ready

If more than one application invokes getrandom(2) before the pool
is ready, then all bar one will be stuck forever because we use
wake_up_interruptible which wakes up a single task.

This patch replaces it with wake_up_all.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

diff --git a/drivers/char/random.c b/drivers/char/random.c
index 9cd6968e2f924bf7eb5c545c4298445651d5665d..8b8c46b5fd5ce4565746842798d786a997570933 100644 (file)
--- a/drivers/char/random.c
+++ b/drivers/char/random.c
@@ -660,7 +660,7 @@ retry:
                r->entropy_total = 0;
                if (r == &nonblocking_pool) {
                        prandom_reseed_late();
-                       wake_up_interruptible(&urandom_init_wait);
+                       wake_up_all(&urandom_init_wait);
                        pr_notice("random: %s pool is initialized\n", r->name);
                }
        }