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Diffstat (limited to 'lib/vsprintf.c')
-rw-r--r--lib/vsprintf.c14
1 files changed, 5 insertions, 9 deletions
diff --git a/lib/vsprintf.c b/lib/vsprintf.c
index 5b0611c00956..be71a03c936a 100644
--- a/lib/vsprintf.c
+++ b/lib/vsprintf.c
@@ -41,6 +41,7 @@
#include <linux/siphash.h>
#include <linux/compiler.h>
#include <linux/property.h>
+#include <linux/notifier.h>
#ifdef CONFIG_BLOCK
#include <linux/blkdev.h>
#endif
@@ -752,26 +753,21 @@ early_param("debug_boot_weak_hash", debug_boot_weak_hash_enable);
static bool filled_random_ptr_key __read_mostly;
static siphash_key_t ptr_key __read_mostly;
-static void fill_ptr_key_workfn(struct work_struct *work);
-static DECLARE_DELAYED_WORK(fill_ptr_key_work, fill_ptr_key_workfn);
-static void fill_ptr_key_workfn(struct work_struct *work)
+static int fill_ptr_key(struct notifier_block *nb, unsigned long action, void *data)
{
- if (!rng_is_initialized()) {
- queue_delayed_work(system_unbound_wq, &fill_ptr_key_work, HZ * 2);
- return;
- }
-
get_random_bytes(&ptr_key, sizeof(ptr_key));
/* Pairs with smp_rmb() before reading ptr_key. */
smp_wmb();
WRITE_ONCE(filled_random_ptr_key, true);
+ return NOTIFY_DONE;
}
static int __init vsprintf_init_hashval(void)
{
- fill_ptr_key_workfn(NULL);
+ static struct notifier_block fill_ptr_key_nb = { .notifier_call = fill_ptr_key };
+ execute_with_initialized_rng(&fill_ptr_key_nb);
return 0;
}
subsys_initcall(vsprintf_init_hashval)