5 files changed, 0 insertions, 42 deletions

diff --git a/kernel/panic.c b/kernel/panic.c
index fe73d18ecdf0..6737b2332275 100644
--- a/kernel/panic.c
+++ b/kernel/panic.c
@@ -273,7 +273,6 @@ void panic(const char *fmt, ...)
 		 * unfortunately means it may not be hardened to work in a
 		 * panic situation.
 		 */
-		try_block_console_kthreads(10000);
 		smp_send_stop();
 	} else {
 		/*
@@ -281,7 +280,6 @@ void panic(const char *fmt, ...)
 		 * kmsg_dump, we will need architecture dependent extra
 		 * works in addition to stopping other CPUs.
 		 */
-		try_block_console_kthreads(10000);
 		crash_smp_send_stop();
 	}
 
diff --git a/kernel/printk/internal.h b/kernel/printk/internal.h
index e7d8578860ad..d947ca6c84f9 100644
--- a/kernel/printk/internal.h
+++ b/kernel/printk/internal.h
@@ -20,8 +20,6 @@ enum printk_info_flags {
 	LOG_CONT	= 8,	/* text is a fragment of a continuation line */
 };
 
-extern bool block_console_kthreads;
-
 __printf(4, 0)
 int vprintk_store(int facility, int level,
 		  const struct dev_printk_info *dev_info,
diff --git a/kernel/printk/printk.c b/kernel/printk/printk.c
index b095fb5f5f61..45c6c2b0b104 100644
--- a/kernel/printk/printk.c
+++ b/kernel/printk/printk.c
@@ -250,9 +250,6 @@ static atomic_t console_kthreads_active = ATOMIC_INIT(0);
 #define console_kthread_printing_exit() \
 	atomic_dec(&console_kthreads_active)
 
-/* Block console kthreads to avoid processing new messages. */
-bool block_console_kthreads;
-
 /*
  * Helper macros to handle lockdep when locking/unlocking console_sem. We use
  * macros instead of functions so that _RET_IP_ contains useful information.
@@ -3733,7 +3730,6 @@ static bool printer_should_wake(struct console *con, u64 seq)
 
 	if (con->blocked ||
 	    console_kthreads_atomically_blocked() ||
-	    block_console_kthreads ||
 	    system_state > SYSTEM_RUNNING ||
 	    oops_in_progress) {
 		return false;
diff --git a/kernel/printk/printk_safe.c b/kernel/printk/printk_safe.c
index caac4de1ea59..ef0f9a2044da 100644
--- a/kernel/printk/printk_safe.c
+++ b/kernel/printk/printk_safe.c
@@ -8,9 +8,7 @@
 #include <linux/smp.h>
 #include <linux/cpumask.h>
 #include <linux/printk.h>
-#include <linux/console.h>
 #include <linux/kprobes.h>
-#include <linux/delay.h>
 
 #include "internal.h"
 
@@ -52,33 +50,3 @@ asmlinkage int vprintk(const char *fmt, va_list args)
 	return vprintk_default(fmt, args);
 }
 EXPORT_SYMBOL(vprintk);
-
-/**
- * try_block_console_kthreads() - Try to block console kthreads and
- *	make the global console_lock() avaialble
- *
- * @timeout_ms:        The maximum time (in ms) to wait.
- *
- * Prevent console kthreads from starting processing new messages. Wait
- * until the global console_lock() become available.
- *
- * Context: Can be called in any context.
- */
-void try_block_console_kthreads(int timeout_ms)
-{
-	block_console_kthreads = true;
-
-	/* Do not wait when the console lock could not be safely taken. */
-	if (this_cpu_read(printk_context) || in_nmi())
-		return;
-
-	while (timeout_ms > 0) {
-		if (console_trylock()) {
-			console_unlock();
-			return;
-		}
-
-		udelay(1000);
-		timeout_ms -= 1;
-	}
-}
diff --git a/kernel/reboot.c b/kernel/reboot.c
index 310363685502..4177645e74d6 100644
--- a/kernel/reboot.c
+++ b/kernel/reboot.c
@@ -74,7 +74,6 @@ void kernel_restart_prepare(char *cmd)
 {
 	blocking_notifier_call_chain(&reboot_notifier_list, SYS_RESTART, cmd);
 	system_state = SYSTEM_RESTART;
-	try_block_console_kthreads(10000);
 	usermodehelper_disable();
 	device_shutdown();
 }
@@ -263,7 +262,6 @@ static void kernel_shutdown_prepare(enum system_states state)
 	blocking_notifier_call_chain(&reboot_notifier_list,
 		(state == SYSTEM_HALT) ? SYS_HALT : SYS_POWER_OFF, NULL);
 	system_state = state;
-	try_block_console_kthreads(10000);
 	usermodehelper_disable();
 	device_shutdown();
 }