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Subject[PATCH 7/8] RISC-V: Comment on the TLB flush in smp_callin()
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This isn't readily apparent from reading the code.

Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
---
arch/riscv/kernel/smpboot.c | 2 ++
1 file changed, 2 insertions(+)

diff --git a/arch/riscv/kernel/smpboot.c b/arch/riscv/kernel/smpboot.c
index 5437a04babcd..953bc540207d 100644
--- a/arch/riscv/kernel/smpboot.c
+++ b/arch/riscv/kernel/smpboot.c
@@ -107,6 +107,8 @@ 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();
--
2.16.4
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