From: Ralf Baechle <ralf@linux-mips.org>
Date: Fri, 15 Jul 2005 15:44:02 +0000 (+0000)
Subject: Make sure that the processor is actually online or die spectacularly.
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=ae1b3d51c89a96c641111e2c103557592577cf51;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

Make sure that the processor is actually online or die spectacularly.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
---

diff --git a/arch/mips/kernel/smp.c b/arch/mips/kernel/smp.c
index 25762917e822..798fce509398 100644
--- a/arch/mips/kernel/smp.c
+++ b/arch/mips/kernel/smp.c
@@ -142,6 +142,11 @@ int smp_call_function (void (*func) (void *info), void *info, int retry,
 	int i, cpus = num_online_cpus() - 1;
 	int cpu = smp_processor_id();
 
+	/*
+	 * Can die spectacularly if this CPU isn't yet marked online
+	 */
+	BUG_ON(!cpu_online(cpu));
+
 	if (!cpus)
 		return 0;