mm: move lru_to_page to mm_inline.h

Move lru_to_page() from internal.h to mm_inline.h.

Signed-off-by: Geliang Tang <geliangtang@163.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/mm/readahead.c b/mm/readahead.c
index 0aff760..20e58e8 100644
--- a/mm/readahead.c
+++ b/mm/readahead.c
@@ -17,6 +17,7 @@
 #include <linux/pagemap.h>
 #include <linux/syscalls.h>
 #include <linux/file.h>
+#include <linux/mm_inline.h>
 
 #include "internal.h"