printk: Correct wrong casting

[ Upstream commit 51a72ab7372d85c96104e58036f1b49ba11e5d2b ]

log_first_seq and console_seq are 64-bit unsigned integers.
Correct a wrong casting that might cut off the output.

Link: http://lkml.kernel.org/r/1538239553-81805-2-git-send-email-zhe.he@windriver.com
Cc: rostedt@goodmis.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: He Zhe <zhe.he@windriver.com>
[sergey.senozhatsky@gmail.com: More descriptive commit message]
Reviewed-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Signed-off-by: Petr Mladek <pmladek@suse.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/kernel/printk/printk.c b/kernel/printk/printk.c
index 11d70fd15e706a84c82fe6d9473aba76633fb300..52390f5a1db114f4f50c37c35315a6dfe31c4c27 100644 (file)
--- a/kernel/printk/printk.c
+++ b/kernel/printk/printk.c
@@ -2358,8 +2358,9 @@ again:
                printk_safe_enter_irqsave(flags);
                raw_spin_lock(&logbuf_lock);
                if (console_seq < log_first_seq) {
-                       len = sprintf(text, "** %u printk messages dropped **\n",
-                                     (unsigned)(log_first_seq - console_seq));
+                       len = sprintf(text,
+                                     "** %llu printk messages dropped **\n",
+                                     log_first_seq - console_seq);
 
                        /* messages are gone, move to first one */
                        console_seq = log_first_seq;