Merge branch 'rework/misc-cleanups' into for-linus

Author: pmladek

include/linux/console.h

@@ -154,6 +154,8 @@ static inline int con_debug_leave(void)
  *			receiving the printk spam for obvious reasons.
  * @CON_EXTENDED:	The console supports the extended output format of
  *			/dev/kmesg which requires a larger output buffer.
+ * @CON_SUSPENDED:	Indicates if a console is suspended. If true, the
+ *			printing callbacks must not be called.
  */
 enum cons_flags {
 	CON_PRINTBUFFER		= BIT(0),
@@ -163,6 +165,7 @@ enum cons_flags {
 	CON_ANYTIME		= BIT(4),
 	CON_BRL			= BIT(5),
 	CON_EXTENDED		= BIT(6),
+	CON_SUSPENDED		= BIT(7),
 };
 
 /**

kernel/debug/kdb/kdb_io.c

@@ -576,6 +576,8 @@ static void kdb_msg_write(const char *msg, int msg_len)
 			continue;
 		if (c == dbg_io_ops->cons)
 			continue;
+		if (!c->write)
+			continue;
 		/*
 		 * Set oops_in_progress to encourage the console drivers to
 		 * disregard their internal spin locks: in the current calling

kernel/printk/internal.h

@@ -103,3 +103,5 @@ struct printk_message {
 	u64			seq;
 	unsigned long		dropped;
 };
+
+bool other_cpu_in_panic(void);