From: Andrew Morton <akpm@osdl.org>

mm/readahead.c:41: parse error before numeric constant

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

 mm/readahead.c |    2 ++
 1 file changed, 2 insertions(+)

diff -puN mm/readahead.c~readahead-sysctl-parameters-fix mm/readahead.c
--- a/mm/readahead.c~readahead-sysctl-parameters-fix
+++ a/mm/readahead.c
@@ -36,9 +36,11 @@
 /* Set look-ahead size to 1/# of the thrashing-threshold. */
 #define LOOKAHEAD_RATIO 8
 
+#ifdef CONFIG_ADAPTIVE_READAHEAD
 /* Set read-ahead size to ##% of the thrashing-threshold. */
 int readahead_ratio = 50;
 EXPORT_SYMBOL_GPL(readahead_ratio);
+#endif
 
 /* Readahead as long as cache hit ratio keeps above 1/##. */
 int readahead_hit_rate = 1;
_