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Bottomley" Cc: linux-kernel@vger.kernel.org, James Morse , Jonathan Cameron , Salil Mehta , linux-parisc@vger.kernel.org Subject: [PATCH] parisc: simplify smp_prepare_boot_cpu() MIME-Version: 1.0 Content-Disposition: inline Message-Id: Sender: Russell King Date: Fri, 20 Oct 2023 15:45:30 +0100 X-Spam-Status: No, score=-0.6 required=5.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on morse.vger.email Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-Greylist: Sender passed SPF test, not delayed by milter-greylist-4.6.4 (morse.vger.email [0.0.0.0]); Fri, 20 Oct 2023 07:45:56 -0700 (PDT) X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1780286130329008101 X-GMAIL-MSGID: 1780286130329008101 smp_prepare_boot_cpu() reads the cpuid of the first CPU, printing a message to state which processor booted, and setting it online and present. This cpuid is retrieved from per_cpu(cpu_data, 0).cpuid, which is initialised in arch/parisc/kernel/processor.c:processor_probe() thusly: p = &per_cpu(cpu_data, cpuid); ... p->cpuid = cpuid; /* save CPU id */ Consequently, the cpuid retrieved seems to be guaranteed to also be zero, meaning that the message printed in this boils down to: pr_info("SMP: bootstrap CPU ID is 0\n"); Moreover, since kernel/cpu.c::boot_cpu_init() already sets CPU 0 to be present and online, there is no need to do this again in smp_prepare_boot_cpu(). Remove this code, and simplify the printk(). Signed-off-by: Russell King (Oracle) --- arch/parisc/kernel/smp.c | 7 +------ 1 file changed, 1 insertion(+), 6 deletions(-) diff --git a/arch/parisc/kernel/smp.c b/arch/parisc/kernel/smp.c index 2019c1f04bd0..989efc8c67a5 100644 --- a/arch/parisc/kernel/smp.c +++ b/arch/parisc/kernel/smp.c @@ -404,13 +404,8 @@ static int smp_boot_one_cpu(int cpuid, struct task_struct *idle) void __init smp_prepare_boot_cpu(void) { - int bootstrap_processor = per_cpu(cpu_data, 0).cpuid; - /* Setup BSP mappings */ - printk(KERN_INFO "SMP: bootstrap CPU ID is %d\n", bootstrap_processor); - - set_cpu_online(bootstrap_processor, true); - set_cpu_present(bootstrap_processor, true); + pr_info("SMP: bootstrap CPU ID is 0\n"); }