diff --git a/tools/memory-model/Documentation/glossary.txt b/tools/memory-model/Documentation/glossary.txt
index 79acb75d56eaa867e38f39e984650bb97188967c..b2da6365be63c0970337d23b74dd37d524ac0a42 100644
--- a/tools/memory-model/Documentation/glossary.txt
+++ b/tools/memory-model/Documentation/glossary.txt
@@ -33,10 +33,11 @@ Acquire: With respect to a lock, acquiring that lock, for example,
acquire loads.
When an acquire load returns the value stored by a release store
- to that same variable, then all operations preceding that store
- happen before any operations following that load acquire.
+ to that same variable, (in other words, the acquire load "reads
+ from" the release store), then all operations preceding that
+ store "happen before" any operations following that load acquire.
- See also "Relaxed" and "Release".
+ See also "Happens-Before", "Reads-From", "Relaxed", and "Release".
Coherence (co): When one CPU's store to a given variable overwrites
either the value from another CPU's store or some later value,
@@ -119,6 +120,11 @@ Fully Ordered: An operation such as smp_mb() that orders all of
that orders all of its CPU's prior accesses, itself, and
all of its CPU's subsequent accesses.
+Happens-Before (hb): A relation between two accesses in which LKMM
+ guarantees the first access precedes the second. For more
+ detail, please see the "THE HAPPENS-BEFORE RELATION: hb"
+ section of explanation.txt.
+
Marked Access: An access to a variable that uses an special function or
macro such as "r1 = READ_ONCE(x)" or "smp_store_release(&a, 1)".
diff --git a/tools/memory-model/README b/tools/memory-model/README
index 39d08d1f0443f1c624eccaad3c63f0b9fd0d01b8..9a84c45504ab64e3b573581acd5af116a00f451c 100644
--- a/tools/memory-model/README
+++ b/tools/memory-model/README
@@ -51,7 +51,7 @@ klitmus7 Compatibility Table
============ ==========
target Linux herdtools7
------------ ----------
- -- 4.18 7.48 --
+ -- 4.14 7.48 --
4.15 -- 4.19 7.49 --
4.20 -- 5.5 7.54 --
5.6 -- 7.56 --
diff --git a/tools/memory-model/litmus-tests/CoRR+poonceonce+Once.litmus b/tools/memory-model/litmus-tests/CoRR+poonceonce+Once.litmus
index 772544f03fb5f0ff459cfaf773bba5e1181edcaf..967f9f2a6226ba62ed593e6aff9e99d1fae02c85 100644
--- a/tools/memory-model/litmus-tests/CoRR+poonceonce+Once.litmus
+++ b/tools/memory-model/litmus-tests/CoRR+poonceonce+Once.litmus
@@ -7,9 +7,7 @@ C CoRR+poonceonce+Once
* reads from the same variable are ordered.
*)
-{
- int x;
-}
+{}
P0(int *x)
{
diff --git a/tools/memory-model/litmus-tests/CoRW+poonceonce+Once.litmus b/tools/memory-model/litmus-tests/CoRW+poonceonce+Once.litmus
index 5faae98f7ffb3f9890e8f6674967ea6ef3ea53e1..4635739f3974dd76925b2a20f874f03a2e55ce5f 100644
--- a/tools/memory-model/litmus-tests/CoRW+poonceonce+Once.litmus
+++ b/tools/memory-model/litmus-tests/CoRW+poonceonce+Once.litmus
@@ -7,9 +7,7 @@ C CoRW+poonceonce+Once
* a given variable and a later write to that same variable are ordered.
*)
-{
- int x;
-}
+{}
P0(int *x)
{
diff --git a/tools/memory-model/litmus-tests/CoWR+poonceonce+Once.litmus b/tools/memory-model/litmus-tests/CoWR+poonceonce+Once.litmus
index 77c9cc9f8dc663652eaa0465e0d8e28ac3cff333..bb068c92d8da27fad692b9d168875bc9c5de815c 100644
--- a/tools/memory-model/litmus-tests/CoWR+poonceonce+Once.litmus
+++ b/tools/memory-model/litmus-tests/CoWR+poonceonce+Once.litmus
@@ -7,9 +7,7 @@ C CoWR+poonceonce+Once
* given variable and a later read from that same variable are ordered.
*)
-{
- int x;
-}
+{}
P0(int *x)
{
diff --git a/tools/memory-model/litmus-tests/CoWW+poonceonce.litmus b/tools/memory-model/litmus-tests/CoWW+poonceonce.litmus
index 85ef746f511a7aad10b9844587e543e15a63aee3..0d9f0a9587996cd37950a7fd4e12eed1e7a7faf9 100644
--- a/tools/memory-model/litmus-tests/CoWW+poonceonce.litmus
+++ b/tools/memory-model/litmus-tests/CoWW+poonceonce.litmus
@@ -7,9 +7,7 @@ C CoWW+poonceonce
* writes to the same variable are ordered.
*)
-{
- int x;
-}
+{}
P0(int *x)
{
diff --git a/tools/memory-model/litmus-tests/IRIW+fencembonceonces+OnceOnce.litmus b/tools/memory-model/litmus-tests/IRIW+fencembonceonces+OnceOnce.litmus
index 87aa900125ab232d14eefe6cb00568dece5e4621..e729d2776e89a7854bc8d2dfc8a856213e4b6a35 100644
--- a/tools/memory-model/litmus-tests/IRIW+fencembonceonces+OnceOnce.litmus
+++ b/tools/memory-model/litmus-tests/IRIW+fencembonceonces+OnceOnce.litmus
@@ -10,10 +10,7 @@ C IRIW+fencembonceonces+OnceOnce
* process? This litmus test exercises LKMM's "propagation" rule.
*)
-{
- int x;
- int y;
-}
+{}
P0(int *x)
{
diff --git a/tools/memory-model/litmus-tests/IRIW+poonceonces+OnceOnce.litmus b/tools/memory-model/litmus-tests/IRIW+poonceonces+OnceOnce.litmus
index f84022dca5551e111c045da83668e65d3795e88e..4b54dd6a6cd9464ace77b470fc38f4ef86ce5cef 100644
--- a/tools/memory-model/litmus-tests/IRIW+poonceonces+OnceOnce.litmus
+++ b/tools/memory-model/litmus-tests/IRIW+poonceonces+OnceOnce.litmus
@@ -10,10 +10,7 @@ C IRIW+poonceonces+OnceOnce
* different process?
*)
-{
- int x;
- int y;
-}
+{}
P0(int *x)
{
diff --git a/tools/memory-model/litmus-tests/ISA2+pooncelock+pooncelock+pombonce.litmus b/tools/memory-model/litmus-tests/ISA2+pooncelock+pooncelock+pombonce.litmus
index 398f624daa7717e1f521d109646643840867a023..094d58df778969c836e97b945e92d3329e1c509f 100644
--- a/tools/memory-model/litmus-tests/ISA2+pooncelock+pooncelock+pombonce.litmus
+++ b/tools/memory-model/litmus-tests/ISA2+pooncelock+pooncelock+pombonce.litmus
@@ -7,12 +7,7 @@ C ISA2+pooncelock+pooncelock+pombonce
* (in P0() and P1()) is visible to external process P2().
*)
-{
- spinlock_t mylock;
- int x;
- int y;
- int z;
-}
+{}
P0(int *x, int *y, spinlock_t *mylock)
{
diff --git a/tools/memory-model/litmus-tests/ISA2+poonceonces.litmus b/tools/memory-model/litmus-tests/ISA2+poonceonces.litmus
index 212a432ba16ba5341fdf1420ed2938bed0c44e18..b321aa6f4ea52d4125b750cd6517d1feddb522d0 100644
--- a/tools/memory-model/litmus-tests/ISA2+poonceonces.litmus
+++ b/tools/memory-model/litmus-tests/ISA2+poonceonces.litmus
@@ -9,11 +9,7 @@ C ISA2+poonceonces
* of the smp_load_acquire() invocations are replaced by READ_ONCE()?
*)
-{
- int x;
- int y;
- int z;
-}
+{}
P0(int *x, int *y)
{
diff --git a/tools/memory-model/litmus-tests/ISA2+pooncerelease+poacquirerelease+poacquireonce.litmus b/tools/memory-model/litmus-tests/ISA2+pooncerelease+poacquirerelease+poacquireonce.litmus
index 7afd85672ccdeaedeb99903a24ed0a284a5ebff8..025b0462ec9bcdb56c35150ab52716aea1b1589c 100644
--- a/tools/memory-model/litmus-tests/ISA2+pooncerelease+poacquirerelease+poacquireonce.litmus
+++ b/tools/memory-model/litmus-tests/ISA2+pooncerelease+poacquirerelease+poacquireonce.litmus
@@ -11,11 +11,7 @@ C ISA2+pooncerelease+poacquirerelease+poacquireonce
* (AKA non-rf) link, so release-acquire is all that is needed.
*)
-{
- int x;
- int y;
- int z;
-}
+{}
P0(int *x, int *y)
{
diff --git a/tools/memory-model/litmus-tests/LB+fencembonceonce+ctrlonceonce.litmus b/tools/memory-model/litmus-tests/LB+fencembonceonce+ctrlonceonce.litmus
index c8a93c7ee556a11ffbfcecdf0890745b1b03d459..4727f5aaf03b05b1c98a6d2d53ded40c8d7023e4 100644
--- a/tools/memory-model/litmus-tests/LB+fencembonceonce+ctrlonceonce.litmus
+++ b/tools/memory-model/litmus-tests/LB+fencembonceonce+ctrlonceonce.litmus
@@ -11,10 +11,7 @@ C LB+fencembonceonce+ctrlonceonce
* another control dependency and order would still be maintained.)
*)
-{
- int x;
- int y;
-}
+{}
P0(int *x, int *y)
{
diff --git a/tools/memory-model/litmus-tests/LB+poacquireonce+pooncerelease.litmus b/tools/memory-model/litmus-tests/LB+poacquireonce+pooncerelease.litmus
index 2fa029568fa1ca9c2d2489ff248a33b57b8bb202..07b9904b0e49f058f8b0f7505078ffb213aa5a6c 100644
--- a/tools/memory-model/litmus-tests/LB+poacquireonce+pooncerelease.litmus
+++ b/tools/memory-model/litmus-tests/LB+poacquireonce+pooncerelease.litmus
@@ -8,10 +8,7 @@ C LB+poacquireonce+pooncerelease
* to the other?
*)
-{
- int x;
- int y;
-}
+{}
P0(int *x, int *y)
{
diff --git a/tools/memory-model/litmus-tests/LB+poonceonces.litmus b/tools/memory-model/litmus-tests/LB+poonceonces.litmus
index 2107306e8625b9acbbeb9a07c6e57e535b3314c0..74c49cb3c37bf78df023689161b09678f78ce2a1 100644
--- a/tools/memory-model/litmus-tests/LB+poonceonces.litmus
+++ b/tools/memory-model/litmus-tests/LB+poonceonces.litmus
@@ -7,10 +7,7 @@ C LB+poonceonces
* be prevented even with no explicit ordering?
*)
-{
- int x;
- int y;
-}
+{}
P0(int *x, int *y)
{
diff --git a/tools/memory-model/litmus-tests/MP+fencewmbonceonce+fencermbonceonce.litmus b/tools/memory-model/litmus-tests/MP+fencewmbonceonce+fencermbonceonce.litmus
index c5c168d929737b68bcae760c12838775cb22a04c..f8ca1229857ad5cabb24b0f31760f17acfc73a39 100644
--- a/tools/memory-model/litmus-tests/MP+fencewmbonceonce+fencermbonceonce.litmus
+++ b/tools/memory-model/litmus-tests/MP+fencewmbonceonce+fencermbonceonce.litmus
@@ -8,10 +8,7 @@ C MP+fencewmbonceonce+fencermbonceonce
* is usually better to use smp_store_release() and smp_load_acquire().
*)
-{
- int buf;
- int flag;
-}
+{}
P0(int *buf, int *flag) // Producer
{
diff --git a/tools/memory-model/litmus-tests/MP+onceassign+derefonce.litmus b/tools/memory-model/litmus-tests/MP+onceassign+derefonce.litmus
index 20ff62649f1ee2e51a7ffa2eb5118d8cad1846d8..d84160b9c1ae01f391b869c8c5b727bbd535f660 100644
--- a/tools/memory-model/litmus-tests/MP+onceassign+derefonce.litmus
+++ b/tools/memory-model/litmus-tests/MP+onceassign+derefonce.litmus
@@ -10,9 +10,7 @@ C MP+onceassign+derefonce
*)
{
- int *p=y;
- int x;
- int y=0;
+p=y;
}
P0(int *x, int **p) // Producer
diff --git a/tools/memory-model/litmus-tests/MP+polockmbonce+poacquiresilsil.litmus b/tools/memory-model/litmus-tests/MP+polockmbonce+poacquiresilsil.litmus
index 153917ad5dc950f84248bf25cee8e493d7dd9fa5..ba91cc63e1487e2dced1cc95997bda5735beaa8c 100644
--- a/tools/memory-model/litmus-tests/MP+polockmbonce+poacquiresilsil.litmus
+++ b/tools/memory-model/litmus-tests/MP+polockmbonce+poacquiresilsil.litmus
@@ -10,10 +10,7 @@ C MP+polockmbonce+poacquiresilsil
* executed before the lock was acquired (loosely speaking).
*)
-{
- spinlock_t lo;
- int x;
-}
+{}
P0(spinlock_t *lo, int *x) // Producer
{
diff --git a/tools/memory-model/litmus-tests/MP+polockonce+poacquiresilsil.litmus b/tools/memory-model/litmus-tests/MP+polockonce+poacquiresilsil.litmus
index aad64397bb8cd4c0e9daa7f429676c9c704b09da..a5ea3ed8f52ebdd7a897032be5ae75ded4a1b3f2 100644
--- a/tools/memory-model/litmus-tests/MP+polockonce+poacquiresilsil.litmus
+++ b/tools/memory-model/litmus-tests/MP+polockonce+poacquiresilsil.litmus
@@ -10,10 +10,7 @@ C MP+polockonce+poacquiresilsil
* speaking).
*)
-{
- spinlock_t lo;
- int x;
-}
+{}
P0(spinlock_t *lo, int *x) // Producer
{
diff --git a/tools/memory-model/litmus-tests/MP+polocks.litmus b/tools/memory-model/litmus-tests/MP+polocks.litmus
index 21cbca6f3be4ca8a385eac87900b379c7ffae09b..e6af05f70069f87df47fedf8a2ebd250e1f86ec1 100644
--- a/tools/memory-model/litmus-tests/MP+polocks.litmus
+++ b/tools/memory-model/litmus-tests/MP+polocks.litmus
@@ -11,11 +11,7 @@ C MP+polocks
* to see all prior accesses by those other CPUs.
*)
-{
- spinlock_t mylock;
- int buf;
- int flag;
-}
+{}
P0(int *buf, int *flag, spinlock_t *mylock) // Producer
{
diff --git a/tools/memory-model/litmus-tests/MP+poonceonces.litmus b/tools/memory-model/litmus-tests/MP+poonceonces.litmus
index 9f9769d647c7bb787e5ce9339ec8414541f53067..ba9c99c6cf65dae90724503c1996935ce9e1f809 100644
--- a/tools/memory-model/litmus-tests/MP+poonceonces.litmus
+++ b/tools/memory-model/litmus-tests/MP+poonceonces.litmus
@@ -7,10 +7,7 @@ C MP+poonceonces
* no ordering at all?
*)
-{
- int buf;
- int flag;
-}
+{}
P0(int *buf, int *flag) // Producer
{
diff --git a/tools/memory-model/litmus-tests/MP+pooncerelease+poacquireonce.litmus b/tools/memory-model/litmus-tests/MP+pooncerelease+poacquireonce.litmus
index cbe28e7334437866a1b250c01999952453b296c1..f174bfe61702c98c73f239475639de40aeaf16ce 100644
--- a/tools/memory-model/litmus-tests/MP+pooncerelease+poacquireonce.litmus
+++ b/tools/memory-model/litmus-tests/MP+pooncerelease+poacquireonce.litmus
@@ -8,10 +8,7 @@ C MP+pooncerelease+poacquireonce
* pattern.
*)
-{
- int buf;
- int flag;
-}
+{}
P0(int *buf, int *flag) // Producer
{
diff --git a/tools/memory-model/litmus-tests/MP+porevlocks.litmus b/tools/memory-model/litmus-tests/MP+porevlocks.litmus
index 012041bd4feb30574d459e583a4e3f31ea1a1c51..b9599141160e62742cc10b99f35801be7b6a70f1 100644
--- a/tools/memory-model/litmus-tests/MP+porevlocks.litmus
+++ b/tools/memory-model/litmus-tests/MP+porevlocks.litmus
@@ -11,11 +11,7 @@ C MP+porevlocks
* see all prior accesses by those other CPUs.
*)
-{
- spinlock_t mylock;
- int buf;
- int flag;
-}
+{}
P0(int *buf, int *flag, spinlock_t *mylock) // Consumer
{
diff --git a/tools/memory-model/litmus-tests/R+fencembonceonces.litmus b/tools/memory-model/litmus-tests/R+fencembonceonces.litmus
index af9463b39b4a5daacd517d7e552f49ac963f1206..222a0b850b4a5d98d087c2d94ab5158e928c43ae 100644
--- a/tools/memory-model/litmus-tests/R+fencembonceonces.litmus
+++ b/tools/memory-model/litmus-tests/R+fencembonceonces.litmus
@@ -9,10 +9,7 @@ C R+fencembonceonces
* cause the resulting test to be allowed.
*)
-{
- int x;
- int y;
-}
+{}
P0(int *x, int *y)
{
diff --git a/tools/memory-model/litmus-tests/R+poonceonces.litmus b/tools/memory-model/litmus-tests/R+poonceonces.litmus
index bcd5574e304ae762c0a32064e215b6a3d200fd38..5386f128a131dfa50852e6fc5869700d0fe09d17 100644
--- a/tools/memory-model/litmus-tests/R+poonceonces.litmus
+++ b/tools/memory-model/litmus-tests/R+poonceonces.litmus
@@ -8,10 +8,7 @@ C R+poonceonces
* store propagation delays.
*)
-{
- int x;
- int y;
-}
+{}
P0(int *x, int *y)
{
diff --git a/tools/memory-model/litmus-tests/S+fencewmbonceonce+poacquireonce.litmus b/tools/memory-model/litmus-tests/S+fencewmbonceonce+poacquireonce.litmus
index c36341d1aed66d2e53df3197526726be1e5ed40b..18479823cd6ccd1315b6723a215bf8df7f38daf2 100644
--- a/tools/memory-model/litmus-tests/S+fencewmbonceonce+poacquireonce.litmus
+++ b/tools/memory-model/litmus-tests/S+fencewmbonceonce+poacquireonce.litmus
@@ -7,10 +7,7 @@ C S+fencewmbonceonce+poacquireonce
* store against a subsequent store?
*)
-{
- int x;
- int y;
-}
+{}
P0(int *x, int *y)
{
diff --git a/tools/memory-model/litmus-tests/S+poonceonces.litmus b/tools/memory-model/litmus-tests/S+poonceonces.litmus
index 7775c23143a0caa635cff6873ae5edd04ae8c174..8c9c2f81a58055cdba5eeea5c502ef24d9416a69 100644
--- a/tools/memory-model/litmus-tests/S+poonceonces.litmus
+++ b/tools/memory-model/litmus-tests/S+poonceonces.litmus
@@ -9,10 +9,7 @@ C S+poonceonces
* READ_ONCE(), is ordering preserved?
*)
-{
- int x;
- int y;
-}
+{}
P0(int *x, int *y)
{
diff --git a/tools/memory-model/litmus-tests/SB+fencembonceonces.litmus b/tools/memory-model/litmus-tests/SB+fencembonceonces.litmus
index 833cdfeb7c093ce9ebb2a616b4e7567d6ee72c79..ed5fff18d2232b722ab4aab2d8bc8403a6fb908b 100644
--- a/tools/memory-model/litmus-tests/SB+fencembonceonces.litmus
+++ b/tools/memory-model/litmus-tests/SB+fencembonceonces.litmus
@@ -9,10 +9,7 @@ C SB+fencembonceonces
* suffice, but not much else.)
*)
-{
- int x;
- int y;
-}
+{}
P0(int *x, int *y)
{
diff --git a/tools/memory-model/litmus-tests/SB+poonceonces.litmus b/tools/memory-model/litmus-tests/SB+poonceonces.litmus
index c92211ecbfdf70b6b820585b4e59f78f7d106637..10d550730b25fdd800f2dd5ec8a9f0e555d65415 100644
--- a/tools/memory-model/litmus-tests/SB+poonceonces.litmus
+++ b/tools/memory-model/litmus-tests/SB+poonceonces.litmus
@@ -8,10 +8,7 @@ C SB+poonceonces
* variable that the preceding process reads.
*)
-{
- int x;
- int y;
-}
+{}
P0(int *x, int *y)
{
diff --git a/tools/memory-model/litmus-tests/SB+rfionceonce-poonceonces.litmus b/tools/memory-model/litmus-tests/SB+rfionceonce-poonceonces.litmus
index 84344b455eb7144ba9378cf5eeba68e2bd0ae399..04a16603660bd29716912acb18d03e894f3a73f3 100644
--- a/tools/memory-model/litmus-tests/SB+rfionceonce-poonceonces.litmus
+++ b/tools/memory-model/litmus-tests/SB+rfionceonce-poonceonces.litmus
@@ -6,10 +6,7 @@ C SB+rfionceonce-poonceonces
* This litmus test demonstrates that LKMM is not fully multicopy atomic.
*)
-{
- int x;
- int y;
-}
+{}
P0(int *x, int *y)
{
diff --git a/tools/memory-model/litmus-tests/WRC+poonceonces+Once.litmus b/tools/memory-model/litmus-tests/WRC+poonceonces+Once.litmus
index 431494708611bfe41cfd744d2b132516e30e536e..6a2bc12a1af1ad6b6bf75c5a902e01acd54f3af7 100644
--- a/tools/memory-model/litmus-tests/WRC+poonceonces+Once.litmus
+++ b/tools/memory-model/litmus-tests/WRC+poonceonces+Once.litmus
@@ -8,10 +8,7 @@ C WRC+poonceonces+Once
* test has no ordering at all.
*)
-{
- int x;
- int y;
-}
+{}
P0(int *x)
{
diff --git a/tools/memory-model/litmus-tests/WRC+pooncerelease+fencermbonceonce+Once.litmus b/tools/memory-model/litmus-tests/WRC+pooncerelease+fencermbonceonce+Once.litmus
index 554999c64db587ba7b5d1b8dd018ef5fc91c7dbc..e9947250d7de6a06ca67a33e9214284fe421a723 100644
--- a/tools/memory-model/litmus-tests/WRC+pooncerelease+fencermbonceonce+Once.litmus
+++ b/tools/memory-model/litmus-tests/WRC+pooncerelease+fencermbonceonce+Once.litmus
@@ -10,10 +10,7 @@ C WRC+pooncerelease+fencermbonceonce+Once
* is A-cumulative in LKMM.
*)
-{
- int x;
- int y;
-}
+{}
P0(int *x)
{
diff --git a/tools/memory-model/litmus-tests/Z6.0+pooncelock+poonceLock+pombonce.litmus b/tools/memory-model/litmus-tests/Z6.0+pooncelock+poonceLock+pombonce.litmus
index 265a95ffef1373bfe605230a718828bf75063f86..415248fb669902a9b1c77e0abf905fabfc9634f5 100644
--- a/tools/memory-model/litmus-tests/Z6.0+pooncelock+poonceLock+pombonce.litmus
+++ b/tools/memory-model/litmus-tests/Z6.0+pooncelock+poonceLock+pombonce.litmus
@@ -9,12 +9,7 @@ C Z6.0+pooncelock+poonceLock+pombonce
* by CPUs not holding that lock.
*)
-{
- spinlock_t mylock;
- int x;
- int y;
- int z;
-}
+{}
P0(int *x, int *y, spinlock_t *mylock)
{
diff --git a/tools/memory-model/litmus-tests/Z6.0+pooncelock+pooncelock+pombonce.litmus b/tools/memory-model/litmus-tests/Z6.0+pooncelock+pooncelock+pombonce.litmus
index 0c9aea8e80df08425721ef252f5f4b3884ba97f6..10a2aa04cd078d9b55898887bb4373437b7b9288 100644
--- a/tools/memory-model/litmus-tests/Z6.0+pooncelock+pooncelock+pombonce.litmus
+++ b/tools/memory-model/litmus-tests/Z6.0+pooncelock+pooncelock+pombonce.litmus
@@ -8,12 +8,7 @@ C Z6.0+pooncelock+pooncelock+pombonce
* seen as ordered by a third process not holding that lock.
*)
-{
- spinlock_t mylock;
- int x;
- int y;
- int z;
-}
+{}
P0(int *x, int *y, spinlock_t *mylock)
{
diff --git a/tools/memory-model/litmus-tests/Z6.0+pooncerelease+poacquirerelease+fencembonceonce.litmus b/tools/memory-model/litmus-tests/Z6.0+pooncerelease+poacquirerelease+fencembonceonce.litmus
index 661f9aaa57914b76ca2759d3deeeb8937c96eaec..88e70b87a683e045ddf3148b7a6a9808214cc5c0 100644
--- a/tools/memory-model/litmus-tests/Z6.0+pooncerelease+poacquirerelease+fencembonceonce.litmus
+++ b/tools/memory-model/litmus-tests/Z6.0+pooncerelease+poacquirerelease+fencembonceonce.litmus
@@ -14,11 +14,7 @@ C Z6.0+pooncerelease+poacquirerelease+fencembonceonce
* involving locking.)
*)
-{
- int x;
- int y;
- int z;
-}
+{}
P0(int *x, int *y)
{