[PATCH] missing includes from infiniband merge

indirect chains of includes are arch-specific and can't
be relied upon...  (hell, even attempt to build it for
itanic would trigger vmalloc.h ones; err.h triggers
on e.g. alpha).

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

drivers/infiniband/hw/ipath/ipath_diag.c

@@ -43,6 +43,7 @@
 
 #include <linux/io.h>
 #include <linux/pci.h>
+#include <linux/vmalloc.h>
 #include <asm/uaccess.h>
 
 #include "ipath_kernel.h"