diff options
Diffstat (limited to 'tools/memory-model/README')
| -rw-r--r-- | tools/memory-model/README | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/tools/memory-model/README b/tools/memory-model/README index fc07b52f2028..b9c562e92981 100644 --- a/tools/memory-model/README +++ b/tools/memory-model/README @@ -207,11 +207,15 @@ The Linux-kernel memory model (LKMM) has the following limitations: case as a store release. b. The "unless" RMW operations are not currently modeled: - atomic_long_add_unless(), atomic_add_unless(), - atomic_inc_unless_negative(), and - atomic_dec_unless_positive(). These can be emulated + atomic_long_add_unless(), atomic_inc_unless_negative(), + and atomic_dec_unless_positive(). These can be emulated in litmus tests, for example, by using atomic_cmpxchg(). + One exception of this limitation is atomic_add_unless(), + which is provided directly by herd7 (so no corresponding + definition in linux-kernel.def). atomic_add_unless() is + modeled by herd7 therefore it can be used in litmus tests. + c. The call_rcu() function is not modeled. It can be emulated in litmus tests by adding another process that invokes synchronize_rcu() and the body of the callback |