From: Andrew Morton <akpm@osdl.org>

mm/readahead.c:1734:5: warning: "CONFIG_DEBUG_READAHEAD" is not defined

Cc: Wu Fengguang <wfg@mail.ustc.edu.cn>
Signed-off-by: Andrew Morton <akpm@osdl.org>
---

 mm/readahead.c |    2 +-
 1 files changed, 1 insertion(+), 1 deletion(-)

diff -puN mm/readahead.c~readahead-call-scheme-ifdef-fix mm/readahead.c
--- a/mm/readahead.c~readahead-call-scheme-ifdef-fix
+++ a/mm/readahead.c
@@ -1663,7 +1663,7 @@ readit:
 }
 EXPORT_SYMBOL_GPL(page_cache_readahead_adaptive);
 
-#if CONFIG_DEBUG_READAHEAD
+#ifdef CONFIG_DEBUG_READAHEAD
 /**
  * readahead_cache_hit - adaptive read-ahead feedback function
  * @ra: file_ra_state which holds the readahead state
_