diff --git a/include/linux/printk.h b/include/linux/printk.h
index baa3f97d8ce87b4e63aceffa2fd9efeb8871c5e4..9b30871c9149988c87f82a2d7d0de2c50ca89b18 100644
--- a/include/linux/printk.h
+++ b/include/linux/printk.h
@@ -255,6 +255,11 @@ extern asmlinkage void dump_stack(void) __cold;
 	printk(KERN_NOTICE pr_fmt(fmt), ##__VA_ARGS__)
 #define pr_info(fmt, ...) \
 	printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
+/*
+ * Like KERN_CONT, pr_cont() should only be used when continuing
+ * a line with no newline ('\n') enclosed. Otherwise it defaults
+ * back to KERN_DEFAULT.
+ */
 #define pr_cont(fmt, ...) \
 	printk(KERN_CONT fmt, ##__VA_ARGS__)