[XFS] When compiling with gcc 4.0 and CONFIG_SMP unset, there are many

warnings along the lines: xfs_linux.h:103:5: warning: "CONFIG_SMP" is not
defined. 

SGI-PV: 946630
SGI-Modid: xfs-linux-melb:xfs-kern:25171a
Signed-off-by: NAdrian Bunk <bunk@stusta.de>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NNathan Scott <nathans@sgi.com>

fs/xfs/linux-2.6/xfs_linux.h

@@ -100,7 +100,7 @@
  */
 #undef  HAVE_REFCACHE	/* reference cache not needed for NFS in 2.6 */
 #define HAVE_SENDFILE	/* sendfile(2) exists in 2.6, but not in 2.4 */
-#if CONFIG_SMP
+#ifdef CONFIG_SMP
 #define HAVE_PERCPU_SB	/* per cpu superblock counters are a 2.6 feature */
 #else
 #undef  HAVE_PERCPU_SB	/* per cpu superblock counters are a 2.6 feature */