From: Huacai Chen <chenhuacai@loongson.cn>
Date: Thu, 29 Jun 2023 12:58:42 +0000 (+0800)
Subject: LoongArch: Set CPU#0 as the io master for FDT
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=872b368b2282604aafbc8af1275e0b28a73b8636;p=linux.git

LoongArch: Set CPU#0 as the io master for FDT

ACPI systems set io masters by parsing ACPI MADT, FDT systems have no
MADT so we explicitly set CPU#0 as the io master. Otherwise CPU#0 will
be considered as hotpluggable.

Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
---

diff --git a/arch/loongarch/kernel/smp.c b/arch/loongarch/kernel/smp.c
index ed167e244cdae..a858a468f7468 100644
--- a/arch/loongarch/kernel/smp.c
+++ b/arch/loongarch/kernel/smp.c
@@ -210,6 +210,7 @@ static void __init fdt_smp_setup(void)
 	}
 
 	loongson_sysconf.nr_cpus = num_processors;
+	set_bit(0, &(loongson_sysconf.cores_io_master));
 #endif
 }