Arguments InA {A}{eqA} x _.
Arguments AMap.In {elt} x m.

Lemma gsoLockSet_2 :
forall tp b b' ofs ofs' pmap,
b <> b' ->
(Maps.PMap.get b' (lockSet (updLockSet tp (b,ofs) pmap))) ofs' =
(Maps.PMap.get b' (lockSet tp)) ofs'.