IKXCLOCK-10700 : Device stuck in boot animation

Revert "mm: change max readahead size to 512KB"
This reverts commit 403678af49ff8f8ad050407f62e5f8918b1825a4.
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 4626cec..ee72b19b 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -1615,7 +1615,7 @@
 void task_dirty_inc(struct task_struct *tsk);
 
 /* readahead.c */
-#define VM_MAX_READAHEAD	512	/* kbytes */
+#define VM_MAX_READAHEAD	128	/* kbytes */
 #define VM_MIN_READAHEAD	16	/* kbytes (includes current page) */
 
 int force_page_cache_readahead(struct address_space *mapping, struct file *filp,