*** ./src/lat_pagefault.c-	Wed Dec  7 21:27:22 1994
--- ./src/lat_pagefault.c	Wed Dec 21 13:27:46 1994
***************
*** 51,60 ****
--- 51,62 ----
  			continue;
  		}
  		where = mmap(0, sbuf.st_size, PROT_READ, MAP_SHARED, fd, 0);
+ #ifdef MS_INVALIDATE
  		if (msync(where, sbuf.st_size, MS_INVALIDATE) != 0) {
  			perror("msync");
  			exit(1);
  		}
+ #endif
  		timeit(av[i], where, sbuf.st_size);
  		munmap(where, sbuf.st_size);
  	}
*** ./src/lmdd.c-	Wed Dec  7 21:27:21 1994
--- ./src/lmdd.c	Wed Dec 21 13:27:46 1994
***************
*** 347,353 ****
--- 347,355 ----
  		return;
  	}
  	where = mmap(0, sb.st_size, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0);
+ #ifdef MS_INVALIDATE
  	msync(where, sb.st_size, MS_INVALIDATE);
+ #endif
  	/* XXX - didn't unmap */
  }
  #endif