[PATCH] missing include in mthca

Missing include - usual portability problems...
Signed-off-by: Al Viro <viro@parcelfarce.linux.theplanet.co.uk>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

drivers/infiniband/hw/mthca/mthca_memfree.c

@@ -35,6 +35,7 @@
 #include "mthca_memfree.h"
 #include "mthca_dev.h"
 #include "mthca_cmd.h"
+#include <linux/mm.h>
 
 /*
  * We allocate in as big chunks as we can, up to a maximum of 256 KB