Update LKMM based on "Restrict to-r to read-read address dependency" …

…and "Make ppo a subrelation of po" patches (#508)

Signed-off-by: Hernan Ponce de Leon <[email protected]>

cat/linux-kernel.cat

@@ -97,8 +97,8 @@ let dep = addr | data
 let rwdep = (dep | ctrl) ; [W]
 let overwrite = co | fr
 let to-w = rwdep | (overwrite & int) | (addr ; [Plain] ; wmb)
-let to-r = addr | (dep ; [Marked] ; rfi)
-let ppo = to-r | to-w | fence | (po-unlock-lock-po & int)
+let to-r = (addr ; [R]) | (dep ; [Marked] ; rfi)
+let ppo = to-r | to-w | (fence & int) | (po-unlock-lock-po & int)
 
 (* Propagation: Ordering from release operations and strong fences. *)
 let rmw-sequence = (rf ; rmw)*