diff options
| -rw-r--r-- | kernel/printk/printk.c | 21 |
1 files changed, 11 insertions, 10 deletions
diff --git a/kernel/printk/printk.c b/kernel/printk/printk.c index 8e37a35764f2..b78947077659 100644 --- a/kernel/printk/printk.c +++ b/kernel/printk/printk.c @@ -3050,21 +3050,22 @@ void console_flush_on_panic(enum con_flush_mode mode) console_may_schedule = 0; if (mode == CONSOLE_REPLAY_ALL) { - struct hlist_node *tmp; struct console *c; + int cookie; u64 seq; seq = prb_first_valid_seq(prb); - /* - * This cannot use for_each_console() because it's not established - * that the current context has console locked and neither there is - * a guarantee that there is no concurrency in that case. - * - * Open code it for documentation purposes and pretend that - * it works. - */ - hlist_for_each_entry_safe(c, tmp, &console_list, node) + + cookie = console_srcu_read_lock(); + for_each_console_srcu(c) { + /* + * If the above console_trylock() failed, this is an + * unsynchronized assignment. But in that case, the + * kernel is in "hope and pray" mode anyway. + */ c->seq = seq; + } + console_srcu_read_unlock(cookie); } console_unlock(); } |