--- zzzz-none-000/linux-3.10.107/fs/ext4/mballoc.h	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/fs/ext4/mballoc.h	2021-02-04 17:41:59.000000000 +0000
@@ -48,7 +48,7 @@
 		}							\
 	} while (0)
 #else
-#define mb_debug(n, fmt, a...)
+#define mb_debug(n, fmt, a...)		no_printk(fmt, ## a)
 #endif
 
 #define EXT4_MB_HISTORY_ALLOC		1	/* allocation */
@@ -175,8 +175,6 @@
 	/* copy of the best found extent taken before preallocation efforts */
 	struct ext4_free_extent ac_f_ex;
 
-	/* number of iterations done. we have to track to limit searching */
-	unsigned long ac_ex_scanned;
 	__u16 ac_groups_scanned;
 	__u16 ac_found;
 	__u16 ac_tail;