From 809631e2bff5aba056df75cc4e43127dbd0278c9 Mon Sep 17 00:00:00 2001 From: John Ogness Date: Thu, 26 May 2022 22:36:56 +0206 Subject: Revert "printk: wake up all waiters" This reverts commit 938ba4084abcf6fdd21d9078513c52f8fb9b00d0. The wait queue @log_wait never has exclusive waiters, so there is no need to use wake_up_interruptible_all(). Using wake_up_interruptible() was the correct function to wake all waiters. Since there are no exclusive waiters, erroneously changing wake_up_interruptible() to wake_up_interruptible_all() did not result in any behavior change. However, using wake_up_interruptible_all() on a wait queue without exclusive waiters is fundamentally wrong. Go back to using wake_up_interruptible() to wake all waiters. Signed-off-by: John Ogness Acked-by: Steven Rostedt (Google) Signed-off-by: Petr Mladek Link: https://lore.kernel.org/r/20220526203056.81123-1-john.ogness@linutronix.de --- kernel/printk/printk.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'kernel/printk') diff --git a/kernel/printk/printk.c b/kernel/printk/printk.c index a3e1035929b0..ea3dd55709e7 100644 --- a/kernel/printk/printk.c +++ b/kernel/printk/printk.c @@ -3904,7 +3904,7 @@ static void wake_up_klogd_work_func(struct irq_work *irq_work) } if (pending & PRINTK_PENDING_WAKEUP) - wake_up_interruptible_all(&log_wait); + wake_up_interruptible(&log_wait); } static DEFINE_PER_CPU(struct irq_work, wake_up_klogd_work) = -- cgit v1.2.3