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[220.132.236.182]) by smtp.gmail.com with ESMTPSA id e10sm2590901pfj.7.2020.01.10.02.46.40 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 10 Jan 2020 02:46:42 -0800 (PST) From: Greentime Hu To: greentime.hu@sifive.com, greentime@kernel.org, anup@brainfault.org, palmer@dabbelt.com, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, rppt@linux.ibm.com, gkulkarni@marvell.com, will@kernel.org, catalin.marinas@arm.com, mark.rutland@arm.com, paul.walmsley@sifive.com, hch@lst.de Subject: [RFC PATCH v2 3/4] riscv: Use variable this_cpu instead of smp_processor_id() Date: Fri, 10 Jan 2020 18:46:26 +0800 Message-Id: <5a30a3a637af05041780214287f46ea576818c99.1577694824.git.greentime.hu@sifive.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: References: In-Reply-To: References: Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org To clean up codes in smpboot.c by using a variable this_cpu to prevent too many calls for smp_processor_id() Signed-off-by: Greentime Hu --- arch/riscv/kernel/smpboot.c | 12 +++++++++--- 1 file changed, 9 insertions(+), 3 deletions(-) diff --git a/arch/riscv/kernel/smpboot.c b/arch/riscv/kernel/smpboot.c index 8bc01f0ca73b..ceef7c579aeb 100644 --- a/arch/riscv/kernel/smpboot.c +++ b/arch/riscv/kernel/smpboot.c @@ -46,6 +46,9 @@ void __init smp_prepare_boot_cpu(void) void __init smp_prepare_cpus(unsigned int max_cpus) { int cpuid; + unsigned int this_cpu; + + this_cpu = smp_processor_id(); /* This covers non-smp usecase mandated by "nosmp" option */ if (max_cpus == 0) @@ -137,6 +140,9 @@ void __init smp_cpus_done(unsigned int max_cpus) asmlinkage __visible void __init smp_callin(void) { struct mm_struct *mm = &init_mm; + unsigned int this_cpu; + + this_cpu = smp_processor_id(); if (!IS_ENABLED(CONFIG_RISCV_SBI)) clint_clear_ipi(cpuid_to_hartid_map(smp_processor_id())); @@ -146,9 +152,9 @@ asmlinkage __visible void __init smp_callin(void) current->active_mm = mm; trap_init(); - notify_cpu_starting(smp_processor_id()); - update_siblings_masks(smp_processor_id()); - set_cpu_online(smp_processor_id(), 1); + notify_cpu_starting(this_cpu); + update_siblings_masks(this_cpu); + set_cpu_online(this_cpu, true); /* * Remote TLB flushes are ignored while the CPU is offline, so emit * a local TLB flush right now just in case. -- 2.17.1