[lttng-dev] [PATCH v2 03/12] urcu/arch/generic: Use atomic builtins if configured
Olivier Dion via lttng-dev <[email protected]>
| Newsgroups | org.lttng.lists.lttng-dev |
|---|---|
| Message-ID | <[email protected]> |
If configured to use atomic builtins, implement SMP memory barriers in term of atomic builtins if the architecture does not implement its own version. Change-Id: Iddc4283606e0fce572e104d2d3f03b5c0d9926fb Co-authored-by: Mathieu Desnoyers <[email protected]> Signed-off-by: Olivier Dion <[email protected]> --- include/urcu/arch/generic.h | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/include/urcu/arch/generic.h b/include/urcu/arch/generic.h index be6e41e..e292c70 100644 --- a/include/urcu/arch/generic.h +++ b/include/urcu/arch/generic.h @@ -43,6 +43,14 @@ extern "C" { * GCC builtins) as well as cmm_rmb and cmm_wmb (defaulting to cmm_mb). */ +#ifdef CONFIG_RCU_USE_ATOMIC_BUILTINS + +# ifndef cmm_smp_mb +# define cmm_smp_mb() __atomic_thread_fence(__ATOMIC_SEQ_CST) +# endif + +#endif /* CONFIG_RCU_USE_ATOMIC_BUILTINS */ + #ifndef cmm_mb #define cmm_mb() __sync_synchronize() #endif -- 2.40.1 _______________________________________________ lttng-dev mailing list [email protected] https://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev