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([2001:8003:e5b0:9f00:dbbc:1945:6e65:ec5]) by smtp.gmail.com with ESMTPSA id s5-20020a17090a948500b0026b3f76a063sm7639370pjo.44.2023.09.18.20.53.58 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 18 Sep 2023 20:54:03 -0700 (PDT) Message-ID: Date: Tue, 19 Sep 2023 13:53:56 +1000 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.12.0 Subject: Re: [RFC PATCH v2 30/35] irqchip/gic-v3: Add support for ACPI's disabled but 'online capable' CPUs Content-Language: en-US To: "Russell King (Oracle)" , James Morse Cc: linux-pm@vger.kernel.org, loongarch@lists.linux.dev, linux-acpi@vger.kernel.org, linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-riscv@lists.infradead.org, kvmarm@lists.linux.dev, x86@kernel.org, Salil Mehta , Jean-Philippe Brucker , jianyong.wu@arm.com, justin.he@arm.com References: <20230913163823.7880-1-james.morse@arm.com> <20230913163823.7880-31-james.morse@arm.com> From: Gavin Shan In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 9/14/23 18:10, Russell King (Oracle) wrote: > On Wed, Sep 13, 2023 at 04:38:18PM +0000, James Morse wrote: >> static inline bool acpi_gicc_is_usable(struct acpi_madt_generic_interrupt *gicc) >> { >> - return (gicc->flags & ACPI_MADT_ENABLED); >> + return ((gicc->flags & ACPI_MADT_ENABLED || >> + gicc->flags & ACPI_MADT_GICC_CPU_CAPABLE)); > > ... and this starts getting silly with the number of parens. > > return gicc->flags & ACPI_MADT_ENABLED || > gicc->flags & ACPI_MADT_GICC_CPU_CAPABLE; > > is entirely sufficient. Also: > > return gicc->flags & (ACPI_MADT_ENABLED | ACPI_MADT_GICC_CPU_CAPABLE); > > also works. > vote for the second one, which is: gicc->flags & (ACPI_MADT_ENABLED | ACPI_MADT_GICC_CPU_CAPABLE) Thanks, Gavin