5404 smbfs needs mmap support
Portions contributed by: Gordon Ross <gordon.w.ross@gmail.com>

@@ -92,10 +92,11 @@
  */
 #define SMI_INT         0x04            /* interrupts allowed */
 #define SMI_NOAC        0x10            /* don't cache attributes */
 #define SMI_LLOCK       0x80            /* local locking only */
 #define SMI_ACL         0x2000          /* share supports ACLs */
+#define SMI_DIRECTIO    0x40000         /* do direct I/O */
 #define SMI_EXTATTR     0x80000         /* share supports ext. attrs */
 #define SMI_DEAD        0x200000        /* mount has been terminated */
 
 /*
  * Stuff returned by smbfs_smb_qfsattr