[PATCH] Move <linux/prio_tree.h> down in <linux/fs.h>

<linux/prio_tree.h> is unsafe for inclusion by userland apps, but it is in
the userland-exposed portion of <linux/fs.h>.  It's only needed in the
__KERNEL__ protected portion of the file, so move the #include down to
there.

lmbench-2.0.4 runs into this issue in 'flushdisk'.
Signed-off-by: Tom Rini <trini@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

include/linux/fs.h

@@ -16,7 +16,6 @@
 #include <linux/dcache.h>
 #include <linux/stat.h>
 #include <linux/cache.h>
-#include <linux/prio_tree.h>
 #include <linux/kobject.h>
 #include <asm/atomic.h>
 
@@ -219,6 +218,7 @@ extern int dir_notify_enable;
 
 #include <linux/list.h>
 #include <linux/radix-tree.h>
+#include <linux/prio_tree.h>
 #include <linux/audit.h>
 #include <linux/init.h>
 #include <asm/semaphore.h>