Merge remote-tracking branch 'kirr/t' into t

* kirr/t:
  X Fix mlock2 build on Debian 8

wcfs/internal/mm.pyx

@@ -33,12 +33,17 @@ cdef extern from *:
     #include <unistd.h>
     #include <sys/syscall.h>
     static int mlock2(const void *addr, size_t len, int flags) {
+    #ifndef SYS_mlock2
+        errno = ENOSYS;
+        return -1;
+    #else
         long err = syscall(SYS_mlock2, addr, len, flags);
         if (err != 0) {
             errno = -err;
             return -1;
         }
         return 0;
+    #endif
     }
     #endif
     #endif
@@ -62,7 +67,7 @@ cpdef enum:
     MLOCK_ONFAULT   = mman.MLOCK_ONFAULT
     MCL_CURRENT     = mman.MCL_CURRENT
     MCL_FUTURE      = mman.MCL_FUTURE
-    MCL_ONFAULT     = mman.MCL_ONFAULT
+    #MCL_ONFAULT     = mman.MCL_ONFAULT
 
     MADV_NORMAL     = mman.MADV_NORMAL
     MADV_RANDOM     = mman.MADV_RANDOM