RISC-V: Use a local variable instead of smp_processor_id() (a2693fe2) · Commits · 戴 / test

Store the smp_processor_id() in a local variable to save some pointer chasing. Signed-off-by:

arch/riscv/kernel/smpboot.c

+4 −3

Original line number	Diff line number	Diff line
		@@ -146,6 +146,7 @@ void __init smp_cpus_done(unsigned int max_cpus)
		asmlinkage __visible void smp_callin(void)
		{
		struct mm_struct *mm = &init_mm;
		unsigned int curr_cpuid = smp_processor_id();

		if (!IS_ENABLED(CONFIG_RISCV_SBI))
		clint_clear_ipi(cpuid_to_hartid_map(smp_processor_id()));
		@@ -155,9 +156,9 @@ asmlinkage __visible void 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(curr_cpuid);
		update_siblings_masks(curr_cpuid);
		set_cpu_online(curr_cpuid, 1);
		/*
		* Remote TLB flushes are ignored while the CPU is offline, so emit
		* a local TLB flush right now just in case.