From 68b6507dc554ba015b5ed5e13b1ed4993cdf4024 Mon Sep 17 00:00:00 2001
From: Kay Sievers <kay@vrfy.org>
Date: Fri, 6 Jul 2012 09:50:09 -0700
Subject: kmsg: make sure all messages reach a newly registered boot console

We suppress printing kmsg records to the console, which are already printed
immediately while we have received their fragments.

Newly registered boot consoles print the entire kmsg buffer during
registration. Clear the console-suppress flag after we skipped the record
during its first storage, so any later print will see these records as usual.

Signed-off-by: Kay Sievers <kay@vrfy.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/kernel/printk.c b/kernel/printk.c
index be9a82b..f02f1f5 100644
--- a/kernel/printk.c
+++ b/kernel/printk.c
@@ -1953,6 +1953,12 @@ skip:
 			 */
 			console_idx = log_next(console_idx);
 			console_seq++;
+			/*
+			 * We will get here again when we register a new
+			 * CON_PRINTBUFFER console. Clear the flag so we
+			 * will properly dump everything later.
+			 */
+			msg->flags &= ~LOG_NOCONS;
 			goto skip;
 		}
 
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