From: Mathieu Desnoyers via lttng-dev <lttng-dev@lists.lttng.org>
To: Michael Jeanson <mjeanson@efficios.com>
Cc: lttng-dev <lttng-dev@lists.lttng.org>
Subject: Re: [lttng-dev] [PATCH urcu 2/4] Blacklist GCC 4.4.0, 4.4.1 and 4.4.2 on ARM
Date: Thu, 17 Dec 2020 08:29:33 -0500 (EST) [thread overview]
Message-ID: <447689624.6529.1608211773801.JavaMail.zimbra@efficios.com> (raw)
In-Reply-To: <20201215162850.78638-2-mjeanson@efficios.com>
Merged in liburcu master, thanks!
Mathieu
----- On Dec 15, 2020, at 11:28 AM, Michael Jeanson mjeanson@efficios.com wrote:
> GCC added __sync_synchronize() in 4.4.0 but it was broken on ARM until
> 4.4.3, see the GCC bug report for more details :
>
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=42263
>
> Signed-off-by: Michael Jeanson <mjeanson@efficios.com>
> Change-Id: I629e3c8b4baaccb34b2311e220f30d0ad8b69a19
> ---
> include/urcu/arch/arm.h | 9 +++++++++
> 1 file changed, 9 insertions(+)
>
> diff --git a/include/urcu/arch/arm.h b/include/urcu/arch/arm.h
> index 5d1c608..e904b06 100644
> --- a/include/urcu/arch/arm.h
> +++ b/include/urcu/arch/arm.h
> @@ -70,6 +70,15 @@ extern "C" {
> # endif
> #endif
>
> +/*
> + * https://gcc.gnu.org/bugzilla/show_bug.cgi?id=42263
> + */
> +#ifdef URCU_GCC_VERSION
> +# if URCU_GCC_VERSION >= 40400 && URCU_GCC_VERSION <= 40402
> +# error Your gcc version has a non-functional __sync_synchronize()
> +# endif
> +#endif
> +
> #ifdef __cplusplus
> }
> #endif
> --
> 2.29.2
--
Mathieu Desnoyers
EfficiOS Inc.
http://www.efficios.com
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next prev parent reply other threads:[~2020-12-17 13:29 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-12-15 16:28 [lttng-dev] [PATCH urcu 1/4] Cleanup: Move ARM specific code to urcu/arch/arm.h Michael Jeanson via lttng-dev
2020-12-15 16:28 ` [lttng-dev] [PATCH urcu 2/4] Blacklist GCC 4.4.0, 4.4.1 and 4.4.2 on ARM Michael Jeanson via lttng-dev
2020-12-17 13:29 ` Mathieu Desnoyers via lttng-dev [this message]
2020-12-15 16:28 ` [lttng-dev] [PATCH urcu 3/4] Use DMB only on ARMv7 Michael Jeanson via lttng-dev
2020-12-17 13:29 ` Mathieu Desnoyers via lttng-dev
2020-12-15 16:28 ` [lttng-dev] [PATCH urcu 4/4] Don't force a target and optimization level " Michael Jeanson via lttng-dev
2020-12-15 16:39 ` Paul E. McKenney via lttng-dev
2020-12-17 13:30 ` Mathieu Desnoyers via lttng-dev
2020-12-17 13:29 ` [lttng-dev] [PATCH urcu 1/4] Cleanup: Move ARM specific code to urcu/arch/arm.h Mathieu Desnoyers via lttng-dev
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