From d595d423d06071bd7a4892c3c2f16bfe1d5b3a85 Mon Sep 17 00:00:00 2001
From: Paul Burton <paul.burton@imgtec.com>
Date: Sat, 12 Aug 2017 19:49:40 -0700
Subject: MIPS: SMP: Allow boot_secondary SMP op to return errors

Allow the boot_secondary SMP op to return an error to __cpu_up(), which
will in turn return it to its caller.

This will allow SMP implementations to return errors quickly in cases
they they know have failed, rather than relying upon __cpu_up()
eventually timing out waiting for the cpu_running completion.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/17014/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
---
 arch/mips/paravirt/paravirt-smp.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'arch/mips/paravirt')

diff --git a/arch/mips/paravirt/paravirt-smp.c b/arch/mips/paravirt/paravirt-smp.c
index b61b26ccf601..107d9f90d668 100644
--- a/arch/mips/paravirt/paravirt-smp.c
+++ b/arch/mips/paravirt/paravirt-smp.c
@@ -100,11 +100,12 @@ static void paravirt_smp_finish(void)
 	local_irq_enable();
 }
 
-static void paravirt_boot_secondary(int cpu, struct task_struct *idle)
+static int paravirt_boot_secondary(int cpu, struct task_struct *idle)
 {
 	paravirt_smp_gp[cpu] = (unsigned long)task_thread_info(idle);
 	smp_wmb();
 	paravirt_smp_sp[cpu] = __KSTK_TOS(idle);
+	return 0;
 }
 
 static irqreturn_t paravirt_reched_interrupt(int irq, void *dev_id)
-- 
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