From db22c5d0a16eb30b78cdeef927df8c2d0b895ef1 Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <eelco.dolstra@logicblox.com>
Date: Wed, 6 Aug 2014 13:14:51 +0200
Subject: [PATCH] journald: Fix off-by-one error in "Missed X kernel messages"
 warning

On receiving a message, "kernel_seqnum" is set to "serial + 1". So
subtracting 1 will cause messages like "Missed 0 kernel messages",
which should be "Missed 1 kernel messages".

(cherry-picked from b9c488f60050248b35640f28e4d00958702ba1c3)

Resolves: #1147524
---
 src/journal/journald-kmsg.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/journal/journald-kmsg.c b/src/journal/journald-kmsg.c
index e393cb7..0073a33 100644
--- a/src/journal/journald-kmsg.c
+++ b/src/journal/journald-kmsg.c
@@ -152,7 +152,7 @@ static void dev_kmsg_record(Server *s, char *p, size_t l) {
                 /* Did we lose any? */
                 if (serial > *s->kernel_seqnum)
                         server_driver_message(s, SD_MESSAGE_JOURNAL_MISSED, "Missed %"PRIu64" kernel messages",
-                                              serial - *s->kernel_seqnum - 1);
+                                              serial - *s->kernel_seqnum);
 
                 /* Make sure we never read this one again. Note that
                  * we always store the next message serial we expect