procfs: Use generic_file_llseek in /proc/kmsg

No need to hold the bkl to seek here, none of the other
fops callbacks use it.

Use generic_file_llseek explicitly.

Signed-off-by: Frederic Weisbecker <[email protected]>
Acked-by: Arnd Bergmann <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Andrew Morton <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: John Kacur <[email protected]>
Cc: KAMEZAWA Hiroyuki <[email protected]>
Cc: Al Viro <[email protected]>

fs/proc/kmsg.c

@@ -53,6 +53,7 @@ static const struct file_operations proc_kmsg_operations = {
 	.poll		= kmsg_poll,
 	.open		= kmsg_open,
 	.release	= kmsg_release,
+	.llseek		= generic_file_llseek,
 };
 
 static int __init proc_kmsg_init(void)