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Message-ID: <CAE-0n50va9r7wrRzbK2KduNPdNNimiKT9CkuP=meA6JaoMTpWw@mail.gmail.com>
Date: Tue, 22 Aug 2023 16:16:37 -0700
From: Stephen Boyd <swboyd@...omium.org>
To: Catalin Marinas <catalin.marinas@....com>,
Daniel Thompson <daniel.thompson@...aro.org>,
Douglas Anderson <dianders@...omium.org>,
Marc Zyngier <maz@...nel.org>,
Mark Rutland <mark.rutland@....com>,
Sumit Garg <sumit.garg@...aro.org>,
Will Deacon <will@...nel.org>
Cc: Lecopzer Chen <lecopzer.chen@...iatek.com>,
linux-arm-kernel@...ts.infradead.org,
linux-perf-users@...r.kernel.org,
Peter Zijlstra <peterz@...radead.org>,
kgdb-bugreport@...ts.sourceforge.net, ito-yuichi@...itsu.com,
Thomas Gleixner <tglx@...utronix.de>,
Chen-Yu Tsai <wens@...e.org>, Ard Biesheuvel <ardb@...nel.org>,
"Rafael J . Wysocki" <rafael.j.wysocki@...el.com>,
Masayoshi Mizuma <msys.mizuma@...il.com>,
D Scott Phillips <scott@...amperecomputing.com>,
Ingo Molnar <mingo@...nel.org>,
Josh Poimboeuf <jpoimboe@...nel.org>,
Kees Cook <keescook@...omium.org>,
Philippe Mathieu-Daudé <philmd@...aro.org>,
Sami Tolvanen <samitolvanen@...gle.com>,
Valentin Schneider <vschneid@...hat.com>,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH v10 3/6] arm64: smp: Remove dedicated wakeup IPI
Quoting Douglas Anderson (2023-08-22 14:26:58)
> diff --git a/arch/arm64/include/asm/smp.h b/arch/arm64/include/asm/smp.h
> index 9b31e6d0da17..798fd76a883a 100644
> --- a/arch/arm64/include/asm/smp.h
> +++ b/arch/arm64/include/asm/smp.h
> @@ -89,9 +89,9 @@ extern void arch_send_call_function_single_ipi(int cpu);
> extern void arch_send_call_function_ipi_mask(const struct cpumask *mask);
>
> #ifdef CONFIG_ARM64_ACPI_PARKING_PROTOCOL
> -extern void arch_send_wakeup_ipi_mask(const struct cpumask *mask);
> +extern void arch_send_wakeup_ipi(int cpu);
Is int used instead of unsigned int because we want to sometimes pass a
negative value to indicate an error? Maybe it should be unsigned int.
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