kmsg_dump: fix build for CONFIG_PRINTK=n

kmsg_dump() fails to build when CONFIG_PRINTK=n; provide stubs
for the kmsg_dump*() functions when CONFIG_PRINTK=n.

kernel/printk.c: In function 'kmsg_dump':
kernel/printk.c:1501: error: 'log_buf_len' undeclared (first use in this function)
kernel/printk.c:1502: error: 'logged_chars' undeclared (first use in this function)
kernel/printk.c:1506: error: 'log_buf' undeclared (first use in this function)

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Acked-by: Simon Kagstrom <simon.kagstrom@netinsight.net>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/kernel/printk.c b/kernel/printk.c
index 051d1f50648f..2a564570f822 100644
--- a/kernel/printk.c
+++ b/kernel/printk.c
@@ -1405,7 +1405,6 @@ bool printk_timed_ratelimit(unsigned long *caller_jiffies,
         return false;
 }
 EXPORT_SYMBOL(printk_timed_ratelimit);
-#endif
 
 static DEFINE_SPINLOCK(dump_list_lock);
 static LIST_HEAD(dump_list);
@@ -1524,3 +1523,4 @@ void kmsg_dump(enum kmsg_dump_reason reason)
                 dumper->dump(dumper, reason, s1, l1, s2, l2);
         spin_unlock_irqrestore(&dump_list_lock, flags);
 }
+#endif