From: "Philippe Mathieu-Daudé" <philippe.mathieu.daude@gmail.com>
To: Stefan Hajnoczi <stefanha@redhat.com>, qemu-devel@nongnu.org
Cc: Florian Weimer <fweimer@redhat.com>,
Kevin Wolf <kwolf@redhat.com>,
qemu-block@nongnu.org, Peter Maydell <peter.maydell@linaro.org>,
Richard Henderson <richard.henderson@linaro.org>,
Paolo Bonzini <pbonzini@redhat.com>, Fam Zheng <fam@euphon.net>,
Serge Guelton <sguelton@redhat.com>
Subject: Re: [PATCH v4 4/4] cpus: use coroutine TLS macros for iothread_locked
Date: Mon, 21 Feb 2022 16:09:06 +0100 [thread overview]
Message-ID: <33126ecf-e70d-ce9f-1933-af781b5dc166@gmail.com> (raw)
In-Reply-To: <20220221142907.346035-5-stefanha@redhat.com>
On 21/2/22 15:29, Stefan Hajnoczi wrote:
> qemu_mutex_iothread_locked() may be used from coroutines. Standard
> __thread variables cannot be used by coroutines. Use the coroutine TLS
> macros instead.
>
> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
> ---
> softmmu/cpus.c | 8 ++++----
> 1 file changed, 4 insertions(+), 4 deletions(-)
>
> diff --git a/softmmu/cpus.c b/softmmu/cpus.c
> index 035395ae13..005a5c31ef 100644
> --- a/softmmu/cpus.c
> +++ b/softmmu/cpus.c
> @@ -473,11 +473,11 @@ bool qemu_in_vcpu_thread(void)
> return current_cpu && qemu_cpu_is_self(current_cpu);
> }
>
> -static __thread bool iothread_locked = false;
> +QEMU_DEFINE_STATIC_CO_TLS(bool, iothread_locked)
While "qemu/coroutine-tls.h" is indirectly included by "rcu.h",
please include it explicitly.
next prev parent reply other threads:[~2022-02-21 15:11 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-02-21 14:29 [PATCH v4 0/4] tls: add macros for coroutine-safe TLS variables Stefan Hajnoczi
2022-02-21 14:29 ` [PATCH v4 1/4] " Stefan Hajnoczi
2022-02-21 15:16 ` Peter Maydell
2022-02-22 13:44 ` Stefan Hajnoczi
2022-02-23 9:47 ` Paolo Bonzini
2022-02-21 14:29 ` [PATCH v4 2/4] util/async: replace __thread with QEMU TLS macros Stefan Hajnoczi
2022-02-21 15:09 ` Philippe Mathieu-Daudé
2022-02-21 14:29 ` [PATCH v4 3/4] rcu: use coroutine " Stefan Hajnoczi
2022-02-21 14:29 ` [PATCH v4 4/4] cpus: use coroutine TLS macros for iothread_locked Stefan Hajnoczi
2022-02-21 15:07 ` Philippe Mathieu-Daudé
2022-02-21 15:09 ` Philippe Mathieu-Daudé [this message]
2022-02-22 13:25 ` Stefan Hajnoczi
2022-02-23 9:45 ` Paolo Bonzini
2022-02-23 9:48 ` Peter Maydell
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