From: Steven Rostedt <rostedt@goodmis.org>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: LKML <linux-kernel@vger.kernel.org>,
Linux Trace Kernel <linux-trace-kernel@vger.kernel.org>,
Masami Hiramatsu <mhiramat@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
Linux Arch <linux-arch@vger.kernel.org>
Subject: Re: [PATCH v3] ring-buffer: Remove 32bit timestamp logic
Date: Thu, 14 Dec 2023 15:27:40 -0500 [thread overview]
Message-ID: <20231214152740.24d01893@gandalf.local.home> (raw)
In-Reply-To: <20231214151911.2df9f845@gandalf.local.home>
On Thu, 14 Dec 2023 15:19:11 -0500
Steven Rostedt <rostedt@goodmis.org> wrote:
> For this issue of the 64bit cmpxchg, is there any config that works for any
> arch that do not have a safe 64-bit cmpxchg? At least for 486, is the
> second half of the if condition reasonable?
>
> if (IS_ENABLED(CONFIG_X86_32) && !IS_ENABLED(CONFIG_X86_CMPXCHG64)) {
> if (unlikely(in_nmi()))
> return NULL;
> }
Ignore this, I'm now reading your other email. I'll have more questions there.
-- Steve
next prev parent reply other threads:[~2023-12-14 20:26 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-12-14 17:54 [PATCH v3] ring-buffer: Remove 32bit timestamp logic Steven Rostedt
2023-12-14 19:46 ` Linus Torvalds
2023-12-14 20:19 ` Steven Rostedt
2023-12-14 20:27 ` Steven Rostedt [this message]
2023-12-14 20:30 ` Linus Torvalds
2023-12-14 20:32 ` Linus Torvalds
2023-12-14 20:47 ` Steven Rostedt
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