linux-kernel - Re: [PATCH v2 00/12] uprobes: add batched register/unregister APIs and per-CPU RW semaphore

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Message-ID: <20240704083935.GR11386@noisy.programming.kicks-ass.net>
Date: Thu, 4 Jul 2024 10:39:35 +0200
From: Peter Zijlstra <peterz@...radead.org>
To: "Paul E. McKenney" <paulmck@...nel.org>
Cc: Andrii Nakryiko <andrii.nakryiko@...il.com>,
	Andrii Nakryiko <andrii@...nel.org>,
	linux-trace-kernel@...r.kernel.org, rostedt@...dmis.org,
	mhiramat@...nel.org, oleg@...hat.com, mingo@...hat.com,
	bpf@...r.kernel.org, jolsa@...nel.org, clm@...a.com,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 00/12] uprobes: add batched register/unregister APIs
 and per-CPU RW semaphore

On Wed, Jul 03, 2024 at 07:08:21AM -0700, Paul E. McKenney wrote:
> On Wed, Jul 03, 2024 at 09:50:57AM +0200, Peter Zijlstra wrote:

> > Would it make sense to disable it for those architectures that have
> > already done this work?
> 
> It might well.  Any architectures other than x86 at this point?

Per 408b961146be ("tracing: WARN on rcuidle")
and git grep "select.*ARCH_WANTS_NO_INSTR"
arch/arm64/Kconfig:     select ARCH_WANTS_NO_INSTR
arch/loongarch/Kconfig: select ARCH_WANTS_NO_INSTR
arch/riscv/Kconfig:     select ARCH_WANTS_NO_INSTR
arch/s390/Kconfig:      select ARCH_WANTS_NO_INSTR
arch/x86/Kconfig:       select ARCH_WANTS_NO_INSTR

I'm thinking you can simply use that same condition here?