OS-881 To workaround OS-580 add support to only invalidate mappings from a single process

@@ -113,17 +113,21 @@
         case MC_SYNC:
                 /*
                  * MS_SYNC used to be defined to be zero but is now non-zero.
                  * For binary compatibility we still accept zero
                  * (the absence of MS_ASYNC) to mean the same thing.
+                 * Binary compatibility is not an issue for MS_INVALCURPROC.
                  */
                 iarg = (uintptr_t)arg;
                 if ((iarg & ~MS_INVALIDATE) == 0)
                         iarg |= MS_SYNC;
 
-                if (((iarg & ~(MS_SYNC|MS_ASYNC|MS_INVALIDATE)) != 0) ||
-                    ((iarg & (MS_SYNC|MS_ASYNC)) == (MS_SYNC|MS_ASYNC))) {
+                if (((iarg &
+                    ~(MS_SYNC|MS_ASYNC|MS_INVALIDATE|MS_INVALCURPROC)) != 0) ||
+                    ((iarg & (MS_SYNC|MS_ASYNC)) == (MS_SYNC|MS_ASYNC)) ||
+                    ((iarg & (MS_INVALIDATE|MS_INVALCURPROC)) ==
+                    (MS_INVALIDATE|MS_INVALCURPROC))) {
                         error = set_errno(EINVAL);
                 } else {
                         error = as_ctl(as, addr, len, cmd, attr, iarg, NULL, 0);
                         if (error) {
                                 (void) set_errno(error);