Unverified Commit b18d6f05 authored Oct 02, 2018 by Palmer Dabbelt

RISC-V: Comment on the TLB flush in smp_callin()



This isn't readily apparent from reading the code.

Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
[Atish: code comment formatting update]
Signed-off-by: Atish Patra <atish.patra@wdc.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>

parent 19ccf29b

arch/riscv/kernel/smpboot.c

+4 −0

Original line number	Diff line number	Diff line
		@@ -106,6 +106,10 @@ asmlinkage void __init smp_callin(void)
		trap_init();
		notify_cpu_starting(smp_processor_id());
		set_cpu_online(smp_processor_id(), 1);
		/*
		* Remote TLB flushes are ignored while the CPU is offline, so emit
		* a local TLB flush right now just in case.
		*/
		local_flush_tlb_all();
		local_irq_enable();
		preempt_disable();